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2009-09-16HWPOISON: Enable error_remove_page on btrfsAndi Kleen
Cc: chris.mason@oracle.com Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Add simple debugfs interface to inject hwpoison on arbitary PFNsAndi Kleen
Useful for some testing scenarios, although specific testing is often done better through MADV_POISON This can be done with the x86 level MCE injector too, but this interface allows it to do independently from low level x86 changes. v2: Add module license (Haicheng Li) Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Add madvise() based injector for hardware poisoned pages v4Andi Kleen
Impact: optional, useful for debugging Add a new madvice sub command to inject poison for some pages in a process' address space. This is useful for testing the poison page handling. This patch can allow root to tie up large amounts of memory. I got feedback from container developers and they didn't see any problem. v2: Use write flag for get_user_pages to make sure to always get a fresh page v3: Don't request write mapping (Fengguang Wu) v4: Move MADV_* number to avoid conflict with KSM (Hugh Dickins) Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Enable error_remove_page for NFSAndi Kleen
Enable hardware memory error handling for NFS Truncation of data pages at runtime should be safe in NFS, even when it doesn't support migration so far. Trond tells me migration is also queued up for 2.6.32. Acked-by: Trond.Myklebust@netapp.com Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Enable .remove_error_page for migration aware file systemsAndi Kleen
Enable removing of corrupted pages through truncation for a bunch of file systems: ext*, xfs, gfs2, ocfs2, ntfs These should cover most server needs. I chose the set of migration aware file systems for this for now, assuming they have been especially audited. But in general it should be safe for all file systems on the data area that support read/write and truncate. Caveat: the hardware error handler does not take i_mutex for now before calling the truncate function. Is that ok? Cc: tytso@mit.edu Cc: hch@infradead.org Cc: mfasheh@suse.com Cc: aia21@cantab.net Cc: hugh.dickins@tiscali.co.uk Cc: swhiteho@redhat.com Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: The high level memory error handler in the VM v7Andi Kleen
Add the high level memory handler that poisons pages that got corrupted by hardware (typically by a two bit flip in a DIMM or a cache) on the Linux level. The goal is to prevent everyone from accessing these pages in the future. This done at the VM level by marking a page hwpoisoned and doing the appropriate action based on the type of page it is. The code that does this is portable and lives in mm/memory-failure.c To quote the overview comment: High level machine check handler. Handles pages reported by the hardware as being corrupted usually due to a 2bit ECC memory or cache failure. This focuses on pages detected as corrupted in the background. When the current CPU tries to consume corruption the currently running process can just be killed directly instead. This implies that if the error cannot be handled for some reason it's safe to just ignore it because no corruption has been consumed yet. Instead when that happens another machine check will happen. Handles page cache pages in various states. The tricky part here is that we can access any page asynchronous to other VM users, because memory failures could happen anytime and anywhere, possibly violating some of their assumptions. This is why this code has to be extremely careful. Generally it tries to use normal locking rules, as in get the standard locks, even if that means the error handling takes potentially a long time. Some of the operations here are somewhat inefficient and have non linear algorithmic complexity, because the data structures have not been optimized for this case. This is in particular the case for the mapping from a vma to a process. Since this case is expected to be rare we hope we can get away with this. There are in principle two strategies to kill processes on poison: - just unmap the data and wait for an actual reference before killing - kill as soon as corruption is detected. Both have advantages and disadvantages and should be used in different situations. Right now both are implemented and can be switched with a new sysctl vm.memory_failure_early_kill The default is early kill. The patch does some rmap data structure walking on its own to collect processes to kill. This is unusual because normally all rmap data structure knowledge is in rmap.c only. I put it here for now to keep everything together and rmap knowledge has been seeping out anyways Includes contributions from Johannes Weiner, Chris Mason, Fengguang Wu, Nick Piggin (who did a lot of great work) and others. Cc: npiggin@suse.de Cc: riel@redhat.com Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Rik van Riel <riel@redhat.com> Reviewed-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
2009-09-16HWPOISON: Add PR_MCE_KILL prctl to control early kill behaviour per processAndi Kleen
This allows processes to override their early/late kill behaviour on hardware memory errors. Typically applications which are memory error aware is better of with early kill (see the error as soon as possible), all others with late kill (only see the error when the error is really impacting execution) There's a global sysctl, but this way an application can set its specific policy. We're using two bits, one to signify that the process stated its intention and that I also made the prctl future proof by enforcing the unused arguments are 0. The state is inherited to children. Note this makes us officially run out of process flags on 32bit, but the next patch can easily add another field. Manpage patch will be supplied separately. Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: shmem: call set_page_dirty() with locked pageWu Fengguang
The dirtying of page and set_page_dirty() can be moved into the page lock. - In shmem_write_end(), the page was dirtied while the page lock was held, but it's being marked dirty just after dropping the page lock. - In shmem_symlink(), both dirtying and marking can be moved into page lock. It's valuable for the hwpoison code to know whether one bad page can be dropped without losing data. It mainly judges by testing the PG_dirty bit after taking the page lock. So it becomes important that the dirtying of page and the marking of dirtiness are both done inside the page lock. Which is a common practice, but sadly not a rule. The noticeable exceptions are - mapped pages - pages with buffer_heads The above pages could go dirty at any time. Fortunately the hwpoison will unmap the page and release the buffer_heads beforehand anyway. Many other types of pages (eg. metadata pages) can also be dirtied at will by their owners, the hwpoison code cannot do meaningful things to them anyway. Only the dirtiness of pagecache pages owned by regular files are interested. v2: AK: Add comment about set_page_dirty rules (suggested by Peter Zijlstra) Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Reviewed-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Define a new error_remove_page address space op for async truncationAndi Kleen
Truncating metadata pages is not safe right now before we haven't audited all file systems. To enable truncation only for data address space define a new address_space callback error_remove_page. This is used for memory_failure.c memory error handling. This can be then set to truncate_inode_page() This patch just defines the new operation and adds documentation. Callers and users come in followon patches. Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Add invalidate_inode_pageWu Fengguang
Add a simple way to invalidate a single page This is just a refactoring of the truncate.c code. Originally from Fengguang, modified by Andi Kleen. Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Refactor truncate to allow direct truncating of page v2Nick Piggin
Extract out truncate_inode_page() out of the truncate path so that it can be used by memory-failure.c [AK: description, headers, fix typos] v2: Some white space changes from Fengguang Wu Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: check and isolate corrupted free pages v2Wu Fengguang
If memory corruption hits the free buddy pages, we can safely ignore them. No one will access them until page allocation time, then prep_new_page() will automatically check and isolate PG_hwpoison page for us (for 0-order allocation). This patch expands prep_new_page() to check every component page in a high order page allocation, in order to completely stop PG_hwpoison pages from being recirculated. Note that the common case -- only allocating a single page, doesn't do any more work than before. Allocating > order 0 does a bit more work, but that's relatively uncommon. This simple implementation may drop some innocent neighbor pages, hopefully it is not a big problem because the event should be rare enough. This patch adds some runtime costs to high order page users. [AK: Improved description] v2: Andi Kleen: Port to -mm code Move check into separate function. Don't dump stack in bad_pages for hwpoisoned pages. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Handle hardware poisoned pages in try_to_unmapAndi Kleen
When a page has the poison bit set replace the PTE with a poison entry. This causes the right error handling to be done later when a process runs into it. v2: add a new flag to not do that (needed for the memory-failure handler later) (Fengguang) v3: remove unnecessary is_migration_entry() test (Fengguang, Minchan) Reviewed-by: Minchan Kim <minchan.kim@gmail.com> Reviewed-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Use bitmask/action code for try_to_unmap behaviourAndi Kleen
try_to_unmap currently has multiple modi (migration, munlock, normal unmap) which are selected by magic flag variables. The logic is not very straight forward, because each of these flag change multiple behaviours (e.g. migration turns off aging, not only sets up migration ptes etc.) Also the different flags interact in magic ways. A later patch in this series adds another mode to try_to_unmap, so this becomes quickly unmanageable. Replace the different flags with a action code (migration, munlock, munmap) and some additional flags as modifiers (ignore mlock, ignore aging). This makes the logic more straight forward and allows easier extension to new behaviours. Change all the caller to declare what they want to do. This patch is supposed to be a nop in behaviour. If anyone can prove it is not that would be a bug. Cc: Lee.Schermerhorn@hp.com Cc: npiggin@suse.de Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: x86: Add VM_FAULT_HWPOISON handling to x86 page fault handler v2Andi Kleen
Add VM_FAULT_HWPOISON handling to the x86 page fault handler. This is very similar to VM_FAULT_OOM, the only difference is that a different si_code is passed to user space and the new addr_lsb field is initialized. v2: Make the printk more verbose/unique Cc: x86@kernel.org Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Add poison check to page fault handlingAndi Kleen
Bail out early when hardware poisoned pages are found in page fault handling. Since they are poisoned they should not be mapped freshly into processes, because that would cause another (potentially deadly) machine check This is generally handled in the same way as OOM, just a different error code is returned to the architecture code. v2: Do a page unlock if needed (Fengguang Wu) Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Add basic support for poisoned pages in fault handler v3Andi Kleen
- Add a new VM_FAULT_HWPOISON error code to handle_mm_fault. Right now architectures have to explicitely enable poison page support, so this is forward compatible to all architectures. They only need to add it when they enable poison page support. - Add poison page handling in swap in fault code v2: Add missing delayacct_clear_flag (Hidehiro Kawai) v3: Really use delayacct_clear_flag (Hidehiro Kawai) Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Add new SIGBUS error codes for hardware poison signalsAndi Kleen
Add new SIGBUS codes for reporting machine checks as signals. When the hardware detects an uncorrected ECC error it can trigger these signals. This is needed for telling KVM's qemu about machine checks that happen to guests, so that it can inject them, but might be also useful for other programs. I find it useful in my test programs. This patch merely defines the new types. - Define two new si_codes for SIGBUS. BUS_MCEERR_AO and BUS_MCEERR_AR * BUS_MCEERR_AO is for "Action Optional" machine checks, which means that some corruption has been detected in the background, but nothing has been consumed so far. The program can ignore those if it wants (but most programs would already get killed) * BUS_MCEERR_AR is for "Action Required" machine checks. This happens when corrupted data is consumed or the application ran into an area which has been known to be corrupted earlier. These require immediate action and cannot just returned to. Most programs would kill themselves. - They report the address of the corruption in the user address space in si_addr. - Define a new si_addr_lsb field that reports the extent of the corruption to user space. That's currently always a (small) page. The user application cannot tell where in this page the corruption happened. AK: I plan to write a man page update before anyone asks. Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Add support for poison swap entries v2Andi Kleen
Memory migration uses special swap entry types to trigger special actions on page faults. Extend this mechanism to also support poisoned swap entries, to trigger poison handling on page faults. This allows follow-on patches to prevent processes from faulting in poisoned pages again. v2: Fix overflow in MAX_SWAPFILES (Fengguang Wu) v3: Better overflow fix (Hidehiro Kawai) Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Export some rmap vma locking to outside worldAndi Kleen
Needed for later patch that walks rmap entries on its own. This used to be very frowned upon, but memory-failure.c does some rather specialized rmap walking and rmap has been stable for quite some time, so I think it's ok now to export it. Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-16HWPOISON: Add page flag for poisoned pagesAndi Kleen
Hardware poisoned pages need special handling in the VM and shouldn't be touched again. This requires a new page flag. Define it here. The page flags wars seem to be over, so it shouldn't be a problem to get a new one. v2: Add TestSetHWPoison (suggested by Johannes Weiner) Acked-by: Christoph Lameter <cl@linux.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
2009-09-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-next-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-next-2.6: ide: fixup for fujitsu disk ide: convert to ->proc_fops at91_ide: remove headers specific for at91sam9263 IDE: palm_bk3710: convert clock usage after clkdev conversion ide: fix races in handling of user-space SET XFER commands ide: allow ide_dev_read_id() to be called from the IRQ context ide: ide-taskfile.c fix style problems drivers/ide/ide-cd.c: Use DIV_ROUND_CLOSEST ide-tape: fix handling of postponed rqs ide-tape: convert to ide_debug_log macro ide-tape: fix debug call ide: Fix annoying warning in ide_pio_bytes(). IDE: Save a call to PageHighMem()
2009-09-15Merge branch 'next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (134 commits) powerpc/nvram: Enable use Generic NVRAM driver for different size chips powerpc/iseries: Fix oops reading from /proc/iSeries/mf/*/cmdline powerpc/ps3: Workaround for flash memory I/O error powerpc/booke: Don't set DABR on 64-bit BookE, use DAC1 instead powerpc/perf_counters: Reduce stack usage of power_check_constraints powerpc: Fix bug where perf_counters breaks oprofile powerpc/85xx: Fix SMP compile error and allow NULL for smp_ops powerpc/irq: Improve nanodoc powerpc: Fix some late PowerMac G5 with PCIe ATI graphics powerpc/fsl-booke: Use HW PTE format if CONFIG_PTE_64BIT powerpc/book3e: Add missing page sizes powerpc/pseries: Fix to handle slb resize across migration powerpc/powermac: Thermal control turns system off too eagerly powerpc/pci: Merge ppc32 and ppc64 versions of phb_scan() powerpc/405ex: support cuImage via included dtb powerpc/405ex: provide necessary fixup function to support cuImage powerpc/40x: Add support for the ESTeem 195E (PPC405EP) SBC powerpc/44x: Add Eiger AMCC (AppliedMicro) PPC460SX evaluation board support. powerpc/44x: Update Arches defconfig powerpc/44x: Update Arches dts ... Fix up conflicts in drivers/char/agp/uninorth-agp.c
2009-09-15Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu: (46 commits) powerpc64: convert to dynamic percpu allocator sparc64: use embedding percpu first chunk allocator percpu: kill lpage first chunk allocator x86,percpu: use embedding for 64bit NUMA and page for 32bit NUMA percpu: update embedding first chunk allocator to handle sparse units percpu: use group information to allocate vmap areas sparsely vmalloc: implement pcpu_get_vm_areas() vmalloc: separate out insert_vmalloc_vm() percpu: add chunk->base_addr percpu: add pcpu_unit_offsets[] percpu: introduce pcpu_alloc_info and pcpu_group_info percpu: move pcpu_lpage_build_unit_map() and pcpul_lpage_dump_cfg() upward percpu: add @align to pcpu_fc_alloc_fn_t percpu: make @dyn_size mandatory for pcpu_setup_first_chunk() percpu: drop @static_size from first chunk allocators percpu: generalize first chunk allocator selection percpu: build first chunk allocators selectively percpu: rename 4k first chunk allocator to page percpu: improve boot messages percpu: fix pcpu_reclaim() locking ... Fix trivial conflict as by Tejun Heo in kernel/sched.c
2009-09-15Nicolas Pitre has a new email addressNicolas Pitre
Due to problems at cam.org, my nico@cam.org email address is no longer valid. FRom now on, nico@fluxnic.net should be used instead. Signed-off-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-15Merge branch 'perfcounters-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perfcounters-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: perf_counter: Fix buffer overflow in perf_copy_attr()
2009-09-15Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (213 commits) V4L/DVB (12720): em28xx-cards: Add vendor/product id for Kworld DVD Maker 2 V4L/DVB (12713): em28xx: Cleanups at ir_i2c handler V4L/DVB (12712): em28xx: properly load ir-kbd-i2c when needed V4L/DVB (12701): saa7134: ir-kbd-i2c init data needs a persistent object V4L/DVB (12699): cx18: ir-kbd-i2c initialization data should point to a persistent object V4L/DVB (12698): em28xx: ir-kbd-i2c init data needs a persistent object V4L/DVB (12707): gspca - sn9c20x: Add SXGA support to MT9M111 V4L/DVB (12706): gspca - sn9c20x: disable exposure/gain controls for MT9M111 sensors. V4L/DVB (12705): gspca - sn9c20x: Add SXGA support to SOI968 V4L/DVB (12703): gspca - sn9c20x: Reduces size of object V4L/DVB (12704): gspca - sn9c20x: Fix exposure on SOI968 sensors V4L/DVB (12696): gspca - sonixj / sn9c102: Two drivers for 0c45:60fc and 0c45:613e. V4L/DVB (12695): gspca - vc032x: Do the LED work with the sensor hv7131r. V4L/DVB (12694): gspca - vc032x: Change the start exchanges of the sensor hv7131r. V4L/DVB (12693): gspca - sunplus: The brightness is signed. V4L/DVB (12692): gspca - sunplus: Optimize code. V4L/DVB (12691): gspca - sonixj: Don't use mdelay(). V4L/DVB (12690): gspca - pac7311: Webcam 06f8:3009 added. V4L/DVB (12686): dvb-core: check supported QAM modulations V4L/DVB (12685): dvb-core: check fe->ops.set_frontend return value ...
2009-09-15Merge branch 'x86-pat-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-pat-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, pat: Fix cacheflush address in change_page_attr_set_clr() mm: remove !NUMA condition from PAGEFLAGS_EXTENDED condition set x86: Fix earlyprintk=dbgp for machines without NX x86, pat: Sanity check remap_pfn_range for RAM region x86, pat: Lookup the protection from memtype list on vm_insert_pfn() x86, pat: Add lookup_memtype to get the current memtype of a paddr x86, pat: Use page flags to track memtypes of RAM pages x86, pat: Generalize the use of page flag PG_uncached x86, pat: Add rbtree to do quick lookup in memtype tracking x86, pat: Add PAT reserve free to io_mapping* APIs x86, pat: New i/f for driver to request memtype for IO regions x86, pat: ioremap to follow same PAT restrictions as other PAT users x86, pat: Keep identity maps consistent with mmaps even when pat_disabled x86, mtrr: make mtrr_aps_delayed_init static bool x86, pat/mtrr: Rendezvous all the cpus for MTRR/PAT init generic-ipi: Allow cpus not yet online to call smp_call_function with irqs disabled x86: Fix an incorrect argument of reserve_bootmem() x86: Fix system crash when loading with "reservetop" parameter
2009-09-15Merge branch 'x86-txt-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-txt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, intel_txt: clean up the impact on generic code, unbreak non-x86 x86, intel_txt: Handle ACPI_SLEEP without X86_TRAMPOLINE x86, intel_txt: Fix typos in Kconfig help x86, intel_txt: Factor out the code for S3 setup x86, intel_txt: tboot.c needs <asm/fixmap.h> intel_txt: Force IOMMU on for Intel TXT launch x86, intel_txt: Intel TXT Sx shutdown support x86, intel_txt: Intel TXT reboot/halt shutdown support x86, intel_txt: Intel TXT boot support
2009-09-15Merge branch 'agp-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6 * 'agp-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6: agp/intel: remove restore in resume agp: fix uninorth build intel-agp: Set dma mask for i915 agp: kill phys_to_gart() and gart_to_phys() intel-agp: fix sglist allocation to avoid vmalloc() intel-agp: Move repeated sglist free into separate function agp: Switch agp_{un,}map_page() to take struct page * argument agp: tidy up handling of scratch pages w.r.t. DMA API intel_agp: Use PCI DMA API correctly on chipsets new enough to have IOMMU agp: Add generic support for graphics dma remapping agp: Switch mask_memory() method to take address argument again, not page
2009-09-15ide: fixup for fujitsu diskWu Zhangjin
This patch will fix the following problem on Yeeloong netbook with fujitsu disk. irq 14: nobody cared (try booting with the "irqpoll" option) Call Trace: [<ffffffff8020d438>] dump_stack+0x8/0x40 [<ffffffff8027ec64>] __report_bad_irq+0x58/0xe4 [<ffffffff8027ee6c>] note_interrupt+0x17c/0x23c [<ffffffff8027f9b8>] handle_level_irq+0xcc/0x134 [<ffffffff802125b0>] mach_irq_dispatch+0xb8/0x1e0 [<ffffffff8020041c>] ret_from_irq+0x0/0x4 [<ffffffff8029e678>] free_hot_cold_page+0x224/0x2a0 [<ffffffff8026f794>] swsusp_free+0xb0/0x14c [<ffffffff8026ec08>] hibernate+0x198/0x218 [<ffffffff8026cfa8>] state_store+0x90/0x138 [<ffffffff8032b5a4>] sysfs_write_file+0x130/0x194 [<ffffffff802c94fc>] vfs_write+0xb8/0x180 [<ffffffff802c96b8>] SyS_write+0x50/0x98 [<ffffffff80203fd8>] handle_sys+0x158/0x174 handlers: [<ffffffff80429670>] (ide_intr+0x0/0x300) Disabling IRQ #14 References: 1. commit 1fde02e7146d4a1bab80fd1506f9018fe71e8521 of git://dev.lemote.com/linux_loongson.git 2. 8bc1e5aa06a2a9a425c4a6795fc564cba1521487 (ide: respect quirk_drives[] list on all controllers) Signed-off-by: Yan Hua <yanh@lemote.com> Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-15perf_counter: Fix buffer overflow in perf_copy_attr()Xiao Guangrong
If we pass a big size data over perf_counter_open() syscall, the kernel will copy this data to a small buffer, it will cause kernel crash. This bug makes the kernel unsafe and non-root local user can trigger it. Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Acked-by: Paul Mackerras <paulus@samba.org> Cc: <stable@kernel.org> LKML-Reference: <4AAF37D4.5010706@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-09-14Merge branch 'for-linus3' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6 * 'for-linus3' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6: SELinux: inline selinux_is_enabled in !CONFIG_SECURITY_SELINUX KEYS: Fix garbage collector KEYS: Unlock tasklist when exiting early from keyctl_session_to_parent CRED: Allow put_cred() to cope with a NULL groups list SELinux: flush the avc before disabling SELinux SELinux: seperate avc_cache flushing Creds: creds->security can be NULL is selinux is disabled
2009-09-14Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: (23 commits) at_hdmac: Rework suspend_late()/resume_early() PM: Reset transition_started at dpm_resume_noirq PM: Update kerneldoc comments in drivers/base/power/main.c PM: Add convenience macro to make switching to dev_pm_ops less error-prone hp-wmi: Switch driver to dev_pm_ops floppy: Switch driver to dev_pm_ops PM: Trivial fixes PM / Hibernate / Memory hotplug: Always use for_each_populated_zone() PM/Hibernate: Do not try to allocate too much memory too hard (rev. 2) PM/Hibernate: Do not release preallocated memory unnecessarily (rev. 2) PM/Hibernate: Rework shrinking of memory PM: Fix typo in label name s/Platofrm_finish/Platform_finish/ PM: Run-time PM platform device bus support PM: Introduce core framework for run-time PM of I/O devices (rev. 17) Driver Core: Make PM operations a const pointer PM: Remove platform device suspend_late()/resume_early() V2 USB: Rework musb suspend()/resume_early() I2C: Rework i2c-s3c2410 suspend_late()/resume() V2 I2C: Rework i2c-pxa suspend_late()/resume_early() DMA: Rework txx9dmac suspend_late()/resume_early() ... Fix trivial conflict in drivers/base/platform.c (due to same constification patch being merged in both sides, along with some other PM work in the PM branch)
2009-09-14Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-kconfig * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-kconfig: kconfig: add missing dependency of conf to localyesconfig kconfig: test if a .config already exists kconfig: make local .config default for streamline_config kconfig: test for /boot/config-uname after /proc/config.gz in localconfig kconfig: unset IKCONFIG_PROC and clean up nesting kconfig: search for a config to base the local(mod|yes)config on kconfig: keep config.gz around even if CONFIG_IKCONFIG_PROC is not set kconfig: have extract-ikconfig read ELF files kconfig: add check if end exists in extract-ikconfig kconfig: enable CONFIG_IKCONFIG from streamline_config.pl kconfig: do not warn about modules built in kconfig: streamline_config.pl do not stop with no depends kconfig: add make localyesconfig option kconfig: make localmodconfig to run streamline_config.pl kconfig: add streamline_config.pl to scripts
2009-09-14V4L/DVB (12720): em28xx-cards: Add vendor/product id for Kworld DVD Maker 2Douglas Schilling Landgraf
Added Kworld DVD Maker 2 Thanks to C Western <l@c-m-w.me.uk> for reporting this board. Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-09-15SELinux: inline selinux_is_enabled in !CONFIG_SECURITY_SELINUXEric Paris
Without this patch building a kernel emits millions of warning like: include/linux/selinux.h:92: warning: ?selinux_is_enabled? defined but not used When it is build without CONFIG_SECURITY_SELINUX. This is harmless, but the function should be inlined, so it gets compiled out. Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Eric Paris <eparis@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>
2009-09-15Merge branch 'for-next' into for-linusTejun Heo
* pcpu_chunk_page_occupied() doesn't exist in for-next. * pcpu_chunk_addr_search() updated to use raw_smp_processor_id(). Conflicts: mm/percpu.c
2009-09-14Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (52 commits) Input: bcm5974 - silence uninitialized variables warnings Input: wistron_btns - add keymap for AOpen 1557 Input: psmouse - use boolean type Input: i8042 - use platform_driver_probe Input: i8042 - use boolean type where it makes sense Input: i8042 - try disabling and re-enabling AUX port at close Input: pxa27x_keypad - allow modifying keymap from userspace Input: sunkbd - fix formatting Input: i8042 - bypass AUX IRQ delivery test on laptops Input: wacom_w8001 - simplify querying logic Input: atkbd - allow setting force-release bitmap via sysfs Input: w90p910_keypad - move a dereference below a NULL test Input: add twl4030_keypad driver Input: matrix-keypad - add function to build device keymap Input: tosakbd - fix cleaning up KEY_STROBEs after error Input: joydev - validate axis/button maps before clobbering current ones Input: xpad - add USB ID for the drumkit controller from Rock Band Input: w90p910_keypad - rename driver name to match platform Input: add new driver for Sentelic Finger Sensing Pad Input: psmouse - allow defining read-only attributes ...
2009-09-14Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: completely remove apple mightymouse from blacklist HID: support larger reports than 64 bytes in hiddev HID: local function should be static HID: ignore Philips IEEE802.15.4 RF Dongle HID: ignore all recent SoundGraph iMON devices HID: fix memory leak on error patch in debug code HID: fix overrun in quirks initialization HID: Drop NULL test on list_entry result HID: driver for Twinhan USB 6253:0100 remote control HID: adding __init/__exit macros to module init/exit functions HID: add rumble support for Thrustmaster Dual Trigger 3-in-1 HID: ntrig tool separation and pen usages HID: Avoid double spin_lock_init on usbhid->lock HID: add force feedback support for Logitech WingMan Formula Force GP HID: Support new variants of Samsung USB IR receiver (0419:0001) HID: fix memory leak on error path in debug code HID: fix debugfs build with !CONFIG_DEBUG_FS HID: use debugfs for events/reports dumping HID: use debugfs for report dumping descriptor
2009-09-14Merge branch 'for-2.6.32' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds
* 'for-2.6.32' of git://git.kernel.dk/linux-2.6-block: (29 commits) block: use blkdev_issue_discard in blk_ioctl_discard Make DISCARD_BARRIER and DISCARD_NOBARRIER writes instead of reads block: don't assume device has a request list backing in nr_requests store block: Optimal I/O limit wrapper cfq: choose a new next_req when a request is dispatched Seperate read and write statistics of in_flight requests aoe: end barrier bios with EOPNOTSUPP block: trace bio queueing trial only when it occurs block: enable rq CPU completion affinity by default cfq: fix the log message after dispatched a request block: use printk_once cciss: memory leak in cciss_init_one() splice: update mtime and atime on files block: make blk_iopoll_prep_sched() follow normal 0/1 return convention cfq-iosched: get rid of must_alloc flag block: use interrupts disabled version of raise_softirq_irqoff() block: fix comment in blk-iopoll.c block: adjust default budget for blk-iopoll block: fix long lines in block/blk-iopoll.c block: add blk-iopoll, a NAPI like approach for block devices ...
2009-09-14Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (209 commits) [SCSI] fix oops during scsi scanning [SCSI] libsrp: fix memory leak in srp_ring_free() [SCSI] libiscsi, bnx2i: make bound ep check common [SCSI] libiscsi: add completion function for drivers that do not need pdu processing [SCSI] scsi_dh_rdac: changes for rdac debug logging [SCSI] scsi_dh_rdac: changes to collect the rdac debug information during the initialization [SCSI] scsi_dh_rdac: move the init code from rdac_activate to rdac_bus_attach [SCSI] sg: fix oops in the error path in sg_build_indirect() [SCSI] mptsas : Bump version to 3.04.12 [SCSI] mptsas : FW event thread and scsi mid layer deadlock in SYNCHRONIZE CACHE command [SCSI] mptsas : Send DID_NO_CONNECT for pending IOs of removed device [SCSI] mptsas : PAE Kernel more than 4 GB kernel panic [SCSI] mptsas : NULL pointer on big endian systems causing Expander not to tear off [SCSI] mptsas : Sanity check for phyinfo is added [SCSI] scsi_dh_rdac: Add support for Sun StorageTek ST2500, ST2510 and ST2530 [SCSI] pmcraid: PMC-Sierra MaxRAID driver to support 6Gb/s SAS RAID controller [SCSI] qla2xxx: Update version number to 8.03.01-k6. [SCSI] qla2xxx: Properly delete rports attached to a vport. [SCSI] qla2xxx: Correct various NPIV issues. [SCSI] qla2xxx: Correct qla2x00_eh_wait_on_command() to wait correctly. ...
2009-09-14Merge branch 'docs-next' of git://git.lwn.net/linux-2.6Linus Torvalds
* 'docs-next' of git://git.lwn.net/linux-2.6: Document the flex_array library. Doc: seq_file.txt fix wrong dd command example.
2009-09-14Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (257 commits) [ARM] Update mach-types ARM: 5636/1: Move vendor enum to AMBA include ARM: Fix pfn_valid() for sparse memory [ARM] orion5x: Add LaCie NAS 2Big Network support [ARM] pxa/sharpsl_pm: zaurus c3000 aka spitz: fix resume ARM: 5686/1: at91: Correct AC97 reset line in at91sam9263ek board ARM: 5640/1: This patch modifies the support of AC97 on the at91sam9263 ek board ARM: 5689/1: Update default config of HP Jornada 700-series machines ARM: 5691/1: fix cache aliasing issues between kmap() and kmap_atomic() with highmem ARM: 5688/1: ks8695_serial: disable_irq() lockup ARM: 5687/1: fix an oops with highmem ARM: 5684/1: Add nuc960 platform to w90x900 ARM: 5683/1: Add nuc950 platform to w90x900 ARM: 5682/1: Add cpu.c and dev.c and modify some files of w90p910 platform ARM: 5626/1: add suspend/resume functions to amba-pl011 serial driver ARM: 5625/1: fix hard coded 4K resource size in amba bus detection MMC: MMCI: convert realview MMC to use gpiolib ARM: 5685/1: Make MMCI driver compile without gpiolib ARM: implement highpte ARM: Show FIQ in /proc/interrupts on CONFIG_FIQ ... Fix up trivial conflict in arch/arm/kernel/signal.c. It was due to the TIF_NOTIFY_RESUME addition in commit d0420c83f ("KEYS: Extend TIF_NOTIFY_RESUME to (almost) all architectures") and follow-ups.
2009-09-14fix undefined reference to user_shm_unlockHugh Dickins
My 353d5c30c666580347515da609dd74a2b8e9b828 "mm: fix hugetlb bug due to user_shm_unlock call" broke the CONFIG_SYSVIPC !CONFIG_MMU build of both 2.6.31 and 2.6.30.6: "undefined reference to `user_shm_unlock'". gcc didn't understand my comment! so couldn't figure out to optimize away user_shm_unlock() from the error path in the hugetlb-less case, as it does elsewhere. Help it to do so, in a language it understands. Reported-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: stable@kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-14Merge branch 'kvm-updates/2.6.32' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
* 'kvm-updates/2.6.32' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (202 commits) MAINTAINERS: update KVM entry KVM: correct error-handling code KVM: fix compile warnings on s390 KVM: VMX: Check cpl before emulating debug register access KVM: fix misreporting of coalesced interrupts by kvm tracer KVM: x86: drop duplicate kvm_flush_remote_tlb calls KVM: VMX: call vmx_load_host_state() only if msr is cached KVM: VMX: Conditionally reload debug register 6 KVM: Use thread debug register storage instead of kvm specific data KVM guest: do not batch pte updates from interrupt context KVM: Fix coalesced interrupt reporting in IOAPIC KVM guest: fix bogus wallclock physical address calculation KVM: VMX: Fix cr8 exiting control clobbering by EPT KVM: Optimize kvm_mmu_unprotect_page_virt() for tdp KVM: Document KVM_CAP_IRQCHIP KVM: Protect update_cr8_intercept() when running without an apic KVM: VMX: Fix EPT with WP bit change during paging KVM: Use kvm_{read,write}_guest_virt() to read and write segment descriptors KVM: x86 emulator: Add adc and sbb missing decoder flags KVM: Add missing #include ...
2009-09-14cleanup console_print()Anirban Sinha
console_print() is an old legacy interface mostly unused in the entire kernel tree. It's best to clean up its existing use and let developers use their own implementation of it as they feel fit. Signed-off-by: Anirban Sinha <asinha@zeugmasystems.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-14Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6: slub: fix slab_pad_check() slub: release kobject if sysfs_create_group failed in sysfs_slab_add SLUB: fix ARCH_KMALLOC_MINALIGN cases 64 and 256 SLUB: Fix some coding style issues SLUB: Drop write permission to /proc/slabinfo slab: remove duplicate kmem_cache_init_late() declarations slub: change kmem_cache->align to record the real alignment slub: use size and objsize orders to disable debug flags slub: add option to disable higher order debugging slabs
2009-09-14Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bpLinus Torvalds
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp: x86, mce: do not compile mcelog message on AMD EDAC, AMD: decode FR MCEs EDAC, AMD: decode load store MCEs EDAC, AMD: decode bus unit MCEs EDAC, AMD: decode instruction cache MCEs EDAC, AMD: decode data cache MCEs EDAC, AMD: carve out decoding of MCi_STATUS ErrorCode EDAC, AMD: carve out MCi_STATUS decoding x86, mce: pass mce info to EDAC for decoding amd64_edac: cleanup amd64_decode_bus_error amd64_edac: remove memory and GART TLB error decoders amd64_edac: cleanup/complete NB MCE decoding amd64_edac: cleanup amd64_process_error_info EDAC: beef up ErrorCodeExt error signatures EDAC: move MCE error descriptions to EDAC core
2009-09-15KEYS: Fix garbage collectorDavid Howells
Fix a number of problems with the new key garbage collector: (1) A rogue semicolon in keyring_gc() was causing the initial count of dead keys to be miscalculated. (2) A missing return in keyring_gc() meant that under certain circumstances, the keyring semaphore would be unlocked twice. (3) The key serial tree iterator (key_garbage_collector()) part of the garbage collector has been modified to: (a) Complete each scan of the keyrings before setting the new timer. (b) Only set the new timer for keys that have yet to expire. This means that the new timer is now calculated correctly, and the gc doesn't get into a loop continually scanning for keys that have expired, and preventing other things from happening, like RCU cleaning up the old keyring contents. (c) Perform an extra scan if any keys were garbage collected in this one as a key might become garbage during a scan, and (b) could mean we don't set the timer again. (4) Made key_schedule_gc() take the time at which to do a collection run, rather than the time at which the key expires. This means the collection of dead keys (key type unregistered) can happen immediately. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: James Morris <jmorris@namei.org>