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2008-11-08Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: optimize sched_clock() a bit sched: improve sched_clock() performance
2008-11-08sched: optimize sched_clock() a bitIngo Molnar
sched_clock() uses cycles_2_ns() needlessly - which is an irq-disabling variant of __cycles_2_ns(). Most of the time sched_clock() is called with irqs disabled already. The few places that call it with irqs enabled need to be updated. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-08sched: improve sched_clock() performanceIngo Molnar
in scheduler-intense workloads native_read_tsc() overhead accounts for 20% of the system overhead: 659567 system_call 41222.9375 686796 schedule 435.7843 718382 __switch_to 665.1685 823875 switch_mm 4526.7857 1883122 native_read_tsc 55385.9412 9761990 total 2.8468 this is large part due to the rdtsc_barrier() that is done before and after reading the TSC. But sched_clock() is not a precise clock in the GTOD sense, using such barriers is completely pointless. So remove the barriers and only use them in vget_cycles(). This improves lat_ctx performance by about 5%. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-07Merge branch 'oprofile-for-tip' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile into x86/urgent
2008-11-07Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, xen: fix use of pgd_page now that it really does return a page
2008-11-07oprofile: Fix p6 counter overflow checkAndi Kleen
Fix the counter overflow check for CPUs with counter width > 32 I had a similar change in a different patch that I didn't submit and I didn't notice the problem earlier because it was always tested together. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Robert Richter <robert.richter@amd.com>
2008-11-07xen: make sure stray alias mappings are gone before pinningJeremy Fitzhardinge
Xen requires that all mappings of pagetable pages are read-only, so that they can't be updated illegally. As a result, if a page is being turned into a pagetable page, we need to make sure all its mappings are RO. If the page had been used for ioremap or vmalloc, it may still have left over mappings as a result of not having been lazily unmapped. This change makes sure we explicitly mop them all up before pinning the page. Unlike aliases created by kmap, the there can be vmalloc aliases even for non-high pages, so we must do the flush unconditionally. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Linux Memory Management List <linux-mm@kvack.org> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: Revert "x86: default to reboot via ACPI" x86: align DirectMap in /proc/meminfo AMD IOMMU: fix lazy IO/TLB flushing in unmap path x86: add smp_mb() before sending INVALIDATE_TLB_VECTOR x86: remove VISWS and PARAVIRT around NR_IRQS puzzle x86: mention ACPI in top-level Kconfig menu x86: size NR_IRQS on 32-bit systems the same way as 64-bit x86: don't allow nr_irqs > NR_IRQS x86/docs: remove noirqbalance param docs x86: don't use tsc_khz to calculate lpj if notsc is passed x86, voyager: fix smp_intr_init() compile breakage AMD IOMMU: fix detection of NP capable IOMMUs
2008-11-06x86, xen: fix use of pgd_page now that it really does return a pageJeremy Fitzhardinge
Impact: fix 32-bit Xen guest boot crash On 32-bit PAE, pud_page, for no good reason, didn't really return a struct page *. Since Jan Beulich's fix "i386/PAE: fix pud_page()", pud_page does return a struct page *. Because PAE has 3 pagetable levels, the pud level is folded into the pgd level, so pgd_page() is the same as pud_page(), and now returns a struct page *. Update the xen/mmu.c code which uses pgd_page() accordingly. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06Revert "x86: default to reboot via ACPI"Eduardo Habkost
This reverts commit c7ffa6c26277b403920e2255d10df849bd613380. the assumptio of this change was that this would not break any existing machine. Andrey Borzenkov reported troubles with the ACPI reboot method: the system would hang on reboot, necessiating a power cycle. Probably more systems are affected as well. Also, there are patches queued up for v2.6.29 to disable virtualization on emergency_restart() - which was the original motivation of this change. Reported-by: Andrey Borzenkov <arvidjaar@mail.ru> Bisected-by: Andrey Borzenkov <arvidjaar@mail.ru> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Acked-by: Avi Kivity <avi@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06x86: align DirectMap in /proc/meminfoHugh Dickins
Impact: right-align /proc/meminfo consistent with other fields When the split-LRU patches added Inactive(anon) and Inactive(file) lines to /proc/meminfo, all counts were moved two columns rightwards to fit in. Now move x86's DirectMap lines two columns rightwards to line up. Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06Merge branch 'iommu-fixes-2.6.28' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into x86/urgent
2008-11-06AMD IOMMU: fix lazy IO/TLB flushing in unmap pathJoerg Roedel
Lazy flushing needs to take care of the unmap path too which is not yet implemented and leads to stale IO/TLB entries. This is fixed by this patch. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-11-06x86: add smp_mb() before sending INVALIDATE_TLB_VECTORSuresh Siddha
Impact: fix rare x2apic hang On x86, x2apic mode accesses for sending IPI's don't have serializing semantics. If the IPI receivner refers(in lock-free fashion) to some memory setup by the sender, the need for smp_mb() before sending the IPI becomes critical in x2apic mode. Add the smp_mb() in native_flush_tlb_others() before sending the IPI. Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06x86: remove VISWS and PARAVIRT around NR_IRQS puzzleYinghai Lu
Impact: fix warning message when PARAVIRT is set in config Remove stale #ifdef components from our IRQ sizing logic. x86/Voyager is the only holdout. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06x86: mention ACPI in top-level Kconfig menuBjorn Helgaas
Impact: clarify menuconfig text Mention ACPI in the top-level menu to give a clue as to where it lives. This matches what ia64 does. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06x86: size NR_IRQS on 32-bit systems the same way as 64-bitYinghai Lu
Impact: make NR_IRQS big enough for system with lots of apic/pins If lots of IO_APIC's are there (or can be there), size the same way as 64-bit, depending on MAX_IO_APICS and NR_CPUS. This fixes the boot problem reported by Ben Hutchings on a 32-bit server with 5 IO-APICs and 240 IO-APIC pins. Signed-off-by: Yinghai <yinghai@kernel.org> Tested-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-06x86: don't allow nr_irqs > NR_IRQSBen Hutchings
Impact: fix boot hang on 32-bit systems with more than 224 IO-APIC pins On some 32-bit systems with a lot of IO-APICs probe_nr_irqs() can return a value larger than NR_IRQS. This will lead to probe_irq_on() overrunning the irq_desc array. I hit this when running net-next-2.6 (close to 2.6.28-rc3) on a Supermicro dual Xeon system. NR_IRQS is 224 but probe_nr_irqs() detects 5 IOAPICs and returns 240. Here are the log messages: Tue Nov 4 16:53:47 2008 ACPI: IOAPIC (id[0x01] address[0xfec00000] gsi_base[0]) Tue Nov 4 16:53:47 2008 IOAPIC[0]: apic_id 1, version 32, address 0xfec00000, GSI 0-23 Tue Nov 4 16:53:47 2008 ACPI: IOAPIC (id[0x02] address[0xfec81000] gsi_base[24]) Tue Nov 4 16:53:47 2008 IOAPIC[1]: apic_id 2, version 32, address 0xfec81000, GSI 24-47 Tue Nov 4 16:53:47 2008 ACPI: IOAPIC (id[0x03] address[0xfec81400] gsi_base[48]) Tue Nov 4 16:53:47 2008 IOAPIC[2]: apic_id 3, version 32, address 0xfec81400, GSI 48-71 Tue Nov 4 16:53:47 2008 ACPI: IOAPIC (id[0x04] address[0xfec82000] gsi_base[72]) Tue Nov 4 16:53:47 2008 IOAPIC[3]: apic_id 4, version 32, address 0xfec82000, GSI 72-95 Tue Nov 4 16:53:47 2008 ACPI: IOAPIC (id[0x05] address[0xfec82400] gsi_base[96]) Tue Nov 4 16:53:47 2008 IOAPIC[4]: apic_id 5, version 32, address 0xfec82400, GSI 96-119 Tue Nov 4 16:53:47 2008 ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 high edge) Tue Nov 4 16:53:47 2008 ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level) Tue Nov 4 16:53:47 2008 Enabling APIC mode: Flat. Using 5 I/O APICs Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Acked-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-05sched: re-tune balancingIngo Molnar
Impact: improve wakeup affinity on NUMA systems, tweak SMP systems Given the fixes+tweaks to the wakeup-buddy code, re-tweak the domain balancing defaults on NUMA and SMP systems. Turn on SD_WAKE_AFFINE which was off on x86 NUMA - there's no reason why we would not want to have wakeup affinity across nodes as well. (we already do this in the standard NUMA template.) lat_ctx on a NUMA box is particularly happy about this change: before: | phoenix:~/l> ./lat_ctx -s 0 2 | "size=0k ovr=2.60 | 2 5.70 after: | phoenix:~/l> ./lat_ctx -s 0 2 | "size=0k ovr=2.65 | 2 2.07 a 2.75x speedup. pipe-test is similarly happy about it too: | phoenix:~/sched-tests> ./pipe-test | 18.26 usecs/loop. | 14.70 usecs/loop. | 14.38 usecs/loop. | 10.55 usecs/loop. # +WAKE_AFFINE on domain0+domain1 | 8.63 usecs/loop. | 8.59 usecs/loop. | 9.03 usecs/loop. | 8.94 usecs/loop. | 8.96 usecs/loop. | 8.63 usecs/loop. Also: - disable SD_BALANCE_NEWIDLE on NUMA and SMP domains (keep it for siblings) - enable SD_WAKE_BALANCE on SMP domains Sysbench+postgresql improves all around the board, quite significantly: .28-rc3-11474e2c .28-rc3-11474e2c-tune ------------------------------------------------- 1: 571 688 +17.08% 2: 1236 1206 -2.55% 4: 2381 2642 +9.89% 8: 4958 5164 +3.99% 16: 9580 9574 -0.07% 32: 7128 8118 +12.20% 64: 7342 8266 +11.18% 128: 7342 8064 +8.95% 256: 7519 7884 +4.62% 512: 7350 7731 +4.93% ------------------------------------------------- SUM: 55412 59341 +6.62% So it's a win both for the runup portion, the peak area and the tail. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-04x86: don't use tsc_khz to calculate lpj if notsc is passedAlok Kataria
Impact: fix udelay when "notsc" boot parameter is passed With notsc passed on commandline, tsc may not be used for udelays, make sure that we do not use tsc_khz to calculate the lpj value in such cases. Reported-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Alok N Kataria <akataria@vmware.com> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-03Merge branch 'io-mappings-for-linus-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'io-mappings-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: io mapping: clean up #ifdefs io mapping: improve documentation i915: use io-mapping interfaces instead of a variety of mapping kludges resources: add io-mapping functions to dynamically map large device apertures x86: add iomap_atomic*()/iounmap_atomic() on 32-bit using fixmaps
2008-11-03io mapping: clean up #ifdefsKeith Packard
Impact: cleanup clean up ifdefs: change #ifdef CONFIG_X86_32/64 to CONFIG_HAVE_ATOMIC_IOMAP. flip around the #ifdef sections to clean up the structure. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-03x86, voyager: fix smp_intr_init() compile breakageJames Bottomley
Impact: fix x86/Voyager build Looks like this became static on the rest of x86. Fix it up by adding an external definition to mach-voyager/setup.c Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-01Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: fix AMDC1E and XTOPOLOGY conflict in cpufeature x86: build fix
2008-11-01x86: Clean up late e820 resource allocationLinus Torvalds
This makes the late e820 resources use 'insert_resource_expand_to_fit()' instead of doing a 'reserve_region_with_split()', and also avoids marking them as IORESOURCE_BUSY. This results in us being perfectly happy to use pre-existing PCI resources even if they were marked as being in a reserved region, while still avoiding any _new_ allocations in the reserved regions. It also makes for a simpler and more accurate resource tree. Example resource allocation from Jonathan Corbet, who has firmware that has an e820 reserved entry that covered a big range (e0000000-fed003ff), and that had various PCI resources in it set up by firmware. With old kernels, the reserved range would force us to re-allocate all pre-existing PCI resources, and his reserved range would end up looking like this: e0000000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 where only the pre-allocated special regions (IOAPIC and HPET) were kept around. With 2.6.28-rc2, which uses 'reserve_region_with_split()', Jonathan's resource tree looked like this: e0000000-fe7fffff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe800000-fe8fffff : reserved fe900000-fe9d9aff : reserved fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9b00-fe9d9bff : reserved fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : reserved fe9da000-fe9dafff : 0000:00:03.3 fe9da000-fe9dafff : reserved fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : reserved fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : reserved fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : reserved fea00000-fea7ffff : 0000:00:02.0 fea00000-fea7ffff : reserved fea80000-feafffff : 0000:00:02.1 fea80000-feafffff : reserved feb00000-febfffff : 0000:00:02.0 feb00000-febfffff : reserved fec00000-fed003ff : reserved fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 and because the reserved entry had been split and moved into the individual resources, and because it used the IORESOURCE_BUSY flag, the drivers that actually wanted to _use_ those resources couldn't actually attach to them: e1000e 0000:00:19.0: BAR 0: can't reserve mem region [0xfe9e0000-0xfe9fffff] HDA Intel 0000:00:1b.0: BAR 0: can't reserve mem region [0xfe9dc000-0xfe9dffff] with this patch, the resource tree instead becomes e0000000-fed003ff : reserved fe800000-fe8fffff : PCI Bus 0000:01 fe9d9b00-fe9d9bff : 0000:00:1f.3 fe9d9c00-fe9d9fff : 0000:00:1a.7 fe9d9c00-fe9d9fff : ehci_hcd fe9da000-fe9dafff : 0000:00:03.3 fe9db000-fe9dbfff : 0000:00:19.0 fe9db000-fe9dbfff : e1000e fe9dc000-fe9dffff : 0000:00:1b.0 fe9dc000-fe9dffff : ICH HD audio fe9e0000-fe9fffff : 0000:00:19.0 fe9e0000-fe9fffff : e1000e fea00000-fea7ffff : 0000:00:02.0 fea80000-feafffff : 0000:00:02.1 feb00000-febfffff : 0000:00:02.0 fec00000-fec00fff : IOAPIC 0 fed00000-fed003ff : HPET 0 ie the one reserved region now ends up surrounding all the PCI resources that were allocated inside of it by firmware, and because it is not marked BUSY, drivers have no problem attaching to the pre-allocated resources. Reported-and-tested-by: Jonathan Corbet <corbet@lwn.net> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Robert Hancock <hancockr@shaw.ca> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-31x86: fix AMDC1E and XTOPOLOGY conflict in cpufeatureVenki Pallipadi
Impact: fix xsave slowdown regression Fix two features from conflicting in feature bits. Fixes this performance regression: Subject: cpu2000(both float and int) 13% regression with 2.6.28-rc1 http://lkml.org/lkml/2008/10/28/36 Reported-by: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com> Bisected-by: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-31x86: add iomap_atomic*()/iounmap_atomic() on 32-bit using fixmapsKeith Packard
Impact: introduce new APIs, separate kmap code from CONFIG_HIGHMEM This takes the code used for CONFIG_HIGHMEM memory mappings except that it's designed for dynamic IO resource mapping. These fixmaps are available even with CONFIG_HIGHMEM turned off. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Eric Anholt <eric@anholt.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-31x86: build fixIngo Molnar
Impact: build fix on certain UP configs fix: arch/x86/kernel/cpu/common.c: In function 'cpu_init': arch/x86/kernel/cpu/common.c:1141: error: 'boot_cpu_id' undeclared (first use in this function) arch/x86/kernel/cpu/common.c:1141: error: (Each undeclared identifier is reported only once arch/x86/kernel/cpu/common.c:1141: error: for each function it appears in.) Pull in asm/smp.h on UP, so that we get the definition of boot_cpu_id. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-30Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: lguest: fix irq vectors. lguest: fix early_ioremap. lguest: fix example launcher compile after moved asm-x86 dir.
2008-10-30Merge branch 'x86-fixes-for-linus-2' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: cpu_index build fix x86/voyager: fix missing cpu_index initialisation x86/voyager: fix compile breakage caused by dc1e35c6e95e8923cf1d3510438b63c600fee1e2 x86: fix /dev/mem mmap breakage when PAT is disabled x86/voyager: fix compile breakage casued by x86: move prefill_possible_map calling early x86: use CONFIG_X86_SMP instead of CONFIG_SMP x86/voyager: fix boot breakage caused by x86: boot secondary cpus through initial_code x86, uv: fix compile error in uv_hub.h i386/PAE: fix pud_page() x86: remove debug code from arch_add_memory() x86: start annotating early ioremap pointers with __iomem x86: two trivial sparse annotations x86: fix init_memory_mapping for [dc000000 - e0000000) - v2
2008-10-31lguest: fix irq vectors.Rusty Russell
do_IRQ: cannot handle IRQ -1 vector 0x20 cpu 0 ------------[ cut here ]------------ kernel BUG at arch/x86/kernel/irq_32.c:219! We're not ISA: we have a 1:1 mapping from vectors to irqs. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2008-10-31lguest: fix early_ioremap.Rusty Russell
dmi_scan_machine breaks under lguest: lguest: unhandled trap 14 at 0xc04edeae (0xffa00000) This is because we use current_cr3 for the read_cr3() paravirt function, and it isn't set until the first cr3 change. We got away with it until this happened. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2008-10-31x86: cpu_index build fixIngo Molnar
fix: arch/x86/kernel/cpu/common.c: In function 'early_identify_cpu': arch/x86/kernel/cpu/common.c:553: error: 'struct cpuinfo_x86' has no member named 'cpu_index' as cpu_index is only available on SMP. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-31x86/voyager: fix missing cpu_index initialisationJames Bottomley
Impact: fix /proc/cpuinfo output on x86/Voyager Ever since | commit 92cb7612aee39642d109b8d935ad265e602c0563 | Author: Mike Travis <travis@sgi.com> | Date: Fri Oct 19 20:35:04 2007 +0200 | | x86: convert cpuinfo_x86 array to a per_cpu array We've had an extra field in cpuinfo_x86 which is cpu_index. Unfortunately, voyager has never initialised this, although the only noticeable impact seems to be that /proc/cpuinfo shows all zeros for the processor ids. Anyway, fix this by initialising the boot CPU properly and setting the index when the secondaries update. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-31x86/voyager: fix compile breakage caused by ↵James Bottomley
dc1e35c6e95e8923cf1d3510438b63c600fee1e2 Impact: build fix on x86/Voyager Given commits like this: | Author: Suresh Siddha <suresh.b.siddha@intel.com> | Date: Tue Jul 29 10:29:19 2008 -0700 | | x86, xsave: enable xsave/xrstor on cpus with xsave support Which deliberately expose boot cpu dependence to pieces of the system, I think it's time to explicitly have a variable for it to prevent this continual misassumption that the boot CPU is zero. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-30x86: fix /dev/mem mmap breakage when PAT is disabledRavikiran G Thirumalai
Impact: allow /dev/mem mmaps on non-PAT CPUs/platforms Fix mmap to /dev/mem when CONFIG_X86_PAT is off and CONFIG_STRICT_DEVMEM is off mmap to /dev/mem on kernel memory has been failing since the introduction of PAT (CONFIG_STRICT_DEVMEM=n case). Seems like the check to avoid cache aliasing with PAT is kicking in even when PAT is disabled. The bug seems to have crept in 2.6.26. This patch makes sure that the mmap to regular kernel memory succeeds if CONFIG_STRICT_DEVMEM=n and PAT is disabled, and the checks to avoid cache aliasing still happens if PAT is enabled. Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Tested-by: Tim Sirianni <tim@scalemp.com> Cc: <stable@kernel.org> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-30x86/voyager: fix compile breakage casued by x86: move prefill_possible_map ↵James Bottomley
calling early Impact: fix build failure on x86/Voyager Before: | commit 329513a35d1a2b6b28d54f5c2c0dde4face8200b | Author: Yinghai Lu <yhlu.kernel@gmail.com> | Date: Wed Jul 2 18:54:40 2008 -0700 | | x86: move prefill_possible_map calling early prefill_possible_mask() was hidden under CONFIG_HOTPLUG_CPU rendering it invisitble to voyager. Since this commit it's exposed, but not provided by the voyager subarch, so add a dummy stub to fix the link breakage. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-30x86: use CONFIG_X86_SMP instead of CONFIG_SMPJames Bottomley
Impact: fix x86/Voyager boot CONFIG_SMP is used for features which work on *all* x86 boxes. CONFIG_X86_SMP is used for standard PC like x86 boxes (for things like multi core and apics) Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-30x86/voyager: fix boot breakage caused by x86: boot secondary cpus through ↵James Bottomley
initial_code Impact: boot up secondary CPUs as well on x86/Voyager systems This commit: | commit 3e9704739daf46a8ba6593d749c67b5f7cd633d2 | Author: Glauber Costa <gcosta@redhat.com> | Date: Wed May 28 13:01:54 2008 -0300 | | x86: boot secondary cpus through initial_code removed the use of initialize_secondary. However, it didn't update voyager, so the secondary cpus no longer boot. Fix this by adding the initial_code switch to voyager as well. Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-30Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, gart: fix gart detection for Fam11h CPUs x86: 64 bit print out absent pages num too x86, kdump: fix invalid access on i386 sparsemem x86: fix APIC_DEBUG with inquire_remote_apic x86: AMD microcode patch loader author update x86: microcode patch loader author update mailmap: add Peter Oruba x86, bts: improve help text for BTS config doc/x86: fix doc subdirs
2008-10-30Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: x86/PCI: build failure at x86/kernel/pci-dma.c with !CONFIG_PCI
2008-10-30x86, uv: fix compile error in uv_hub.hMike Travis
Impact: include file dependency cleanup Fix compile errors of files that include asm/uv/uv_hub.h but do not include linux/timer.h. [ such files are not mainline right now. ] Signed-of-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-30.gitignore updatesAlexey Dobriyan
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-30AMD IOMMU: fix detection of NP capable IOMMUsJoerg Roedel
This patch changes the code to use IOMMU_CAP_NPCACHE as a shift and not as a mask. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2008-10-30i386/PAE: fix pud_page()Jan Beulich
Impact: cleanup To the unsuspecting user it is quite annoying that this broken and inconsistent with x86-64 definition still exists. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-29x86: remove debug code from arch_add_memory()Gary Hade
Impact: remove incorrect WARN_ON(1) Gets rid of dmesg spam created during physical memory hot-add which will very likely confuse users. The change removes what appears to be debugging code which I assume was unintentionally included in: x86: arch/x86/mm/init_64.c printk fixes commit 10f22dde556d1ed41d55355d1fb8ad495f9810c8 Signed-off-by: Gary Hade <garyhade@us.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-29x86: start annotating early ioremap pointers with __iomemHarvey Harrison
Impact: some new sparse warnings in e820.c etc, but no functional change. As with regular ioremap, iounmap etc, annotate with __iomem. Fixes the following sparse warnings, will produce some new ones elsewhere in arch/x86 that will get worked out over time. arch/x86/mm/ioremap.c:402:9: warning: cast removes address space of expression arch/x86/mm/ioremap.c:406:10: warning: cast adds address space to expression (<asn:2>) arch/x86/mm/ioremap.c:782:19: warning: Using plain integer as NULL pointer Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-29x86: two trivial sparse annotationsHarvey Harrison
Impact: fewer sparse warnings, no functional changes arch/x86/kernel/vsmp_64.c:87:14: warning: incorrect type in argument 1 (different address spaces) arch/x86/kernel/vsmp_64.c:87:14: expected void const volatile [noderef] <asn:2>*addr arch/x86/kernel/vsmp_64.c:87:14: got void *[assigned] address arch/x86/kernel/vsmp_64.c:88:22: warning: incorrect type in argument 1 (different address spaces) arch/x86/kernel/vsmp_64.c:88:22: expected void const volatile [noderef] <asn:2>*addr arch/x86/kernel/vsmp_64.c:88:22: got void * arch/x86/kernel/vsmp_64.c:100:23: warning: incorrect type in argument 2 (different address spaces) arch/x86/kernel/vsmp_64.c:100:23: expected void volatile [noderef] <asn:2>*addr arch/x86/kernel/vsmp_64.c:100:23: got void * arch/x86/kernel/vsmp_64.c:101:23: warning: incorrect type in argument 1 (different address spaces) arch/x86/kernel/vsmp_64.c:101:23: expected void const volatile [noderef] <asn:2>*addr arch/x86/kernel/vsmp_64.c:101:23: got void * arch/x86/mm/gup.c:235:6: warning: incorrect type in argument 1 (different base types) arch/x86/mm/gup.c:235:6: expected void const volatile [noderef] <asn:1>*<noident> arch/x86/mm/gup.c:235:6: got unsigned long [unsigned] [assigned] start Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-28x86: fix init_memory_mapping for [dc000000 - e0000000) - v2Yinghai Lu
Impact: change over-mapping to precise mapping, fix /proc/meminfo output v2: fix less than 1G ram system handling when gart aperture is 0xdc000000 - 0xe0000000 it return 0xc0000000 - 0xe0000000 that is not right. this patch fix that will get exact mapping on 256g sytem with that aperture after patch LBSuse:~ # cat /proc/meminfo MemTotal: 264742432 kB MemFree: 263920628 kB Buffers: 1416 kB Cached: 24468 kB ... DirectMap4k: 5760 kB DirectMap2M: 3205120 kB DirectMap1G: 265289728 kB it is consistent to LBSuse:~ # cat /sys/kernel/debug/kernel_page_tables .. ---[ Low Kernel Mapping ]--- 0xffff880000000000-0xffff880000200000 2M RW GLB x pte 0xffff880000200000-0xffff880040000000 1022M RW PSE GLB x pmd 0xffff880040000000-0xffff8800c0000000 2G RW PSE GLB NX pud 0xffff8800c0000000-0xffff8800d7e00000 382M RW PSE GLB NX pmd 0xffff8800d7e00000-0xffff8800d7fa0000 1664K RW GLB NX pte 0xffff8800d7fa0000-0xffff8800d8000000 384K pte 0xffff8800d8000000-0xffff8800dc000000 64M pmd 0xffff8800dc000000-0xffff8800e0000000 64M RW PSE GLB NX pmd 0xffff8800e0000000-0xffff880100000000 512M pmd 0xffff880100000000-0xffff880800000000 28G RW PSE GLB NX pud 0xffff880800000000-0xffff880824600000 582M RW PSE GLB NX pmd 0xffff880824600000-0xffff8808247f0000 1984K RW GLB NX pte 0xffff8808247f0000-0xffff880824800000 64K RW PCD GLB NX pte 0xffff880824800000-0xffff880840000000 440M RW PSE GLB NX pmd 0xffff880840000000-0xffff884000000000 223G RW PSE GLB NX pud 0xffff884000000000-0xffff884028000000 640M RW PSE GLB NX pmd 0xffff884028000000-0xffff884040000000 384M pmd 0xffff884040000000-0xffff888000000000 255G pud 0xffff888000000000-0xffffc20000000000 58880G pgd Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-28Merge branch 'tracing-fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (31 commits) ftrace: fix current_tracer error return tracing: fix a build error on alpha ftrace: use a real variable for ftrace_nop in x86 tracing/ftrace: make boot tracer select the sched_switch tracer tracepoint: check if the probe has been registered asm-generic: define DIE_OOPS in asm-generic trace: fix printk warning for u64 ftrace: warning in kernel/trace/ftrace.c ftrace: fix build failure ftrace, powerpc, sparc64, x86: remove notrace from arch ftrace file ftrace: remove ftrace hash ftrace: remove mcount set ftrace: remove daemon ftrace: disable dynamic ftrace for all archs that use daemon ftrace: add ftrace warn on to disable ftrace ftrace: only have ftrace_kill atomic ftrace: use probe_kernel ftrace: comment arch ftrace code ftrace: return error on failed modified text. ftrace: dynamic ftrace process only text section ...
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