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Add an above_background_load() function which can be used by other
subsystems to detect if there is anything besides niced tasks running.
Place it in sched.h to allow it to be compiled out if not used.
Unused for now, but it is a useful hint to the IO scheduler and to
swap-prefetch.
Signed-off-by: Con Kolivas <kernel@kolivas.org>
Cc: Peter Williams <pwil3058@bigpond.net.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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This adds a general mechanism whereby a task can request the scheduler to
notify it whenever it is preempted or scheduled back in. This allows the
task to swap any special-purpose registers like the fpu or Intel's VT
registers.
Signed-off-by: Avi Kivity <avi@qumranet.com>
[ mingo@elte.hu: fixes, cleanups ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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increase SCHED_LOAD_SCALE_FUZZ that adds a small amount of
over-balancing: to help distribute CPU-bound tasks more fairly on SMP
systems.
the problem of unfair balancing was noticed and reported by Tong N Li.
10 CPU-bound tasks running on 8 CPUs, v2.6.23-rc1:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2572 mingo 20 0 1576 244 196 R 100 0.0 1:03.61 loop
2578 mingo 20 0 1576 248 196 R 100 0.0 1:03.59 loop
2576 mingo 20 0 1576 248 196 R 100 0.0 1:03.52 loop
2571 mingo 20 0 1576 244 196 R 100 0.0 1:03.46 loop
2569 mingo 20 0 1576 244 196 R 99 0.0 1:03.36 loop
2570 mingo 20 0 1576 244 196 R 95 0.0 1:00.55 loop
2577 mingo 20 0 1576 248 196 R 50 0.0 0:31.88 loop
2574 mingo 20 0 1576 248 196 R 50 0.0 0:31.87 loop
2573 mingo 20 0 1576 248 196 R 50 0.0 0:31.86 loop
2575 mingo 20 0 1576 248 196 R 50 0.0 0:31.86 loop
v2.6.23-rc1 + patch:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2681 mingo 20 0 1576 244 196 R 85 0.0 3:51.68 loop
2688 mingo 20 0 1576 244 196 R 81 0.0 3:46.35 loop
2682 mingo 20 0 1576 244 196 R 80 0.0 3:43.68 loop
2685 mingo 20 0 1576 248 196 R 80 0.0 3:45.97 loop
2683 mingo 20 0 1576 248 196 R 80 0.0 3:40.25 loop
2679 mingo 20 0 1576 244 196 R 80 0.0 3:33.53 loop
2680 mingo 20 0 1576 244 196 R 79 0.0 3:43.53 loop
2686 mingo 20 0 1576 244 196 R 79 0.0 3:39.31 loop
2687 mingo 20 0 1576 244 196 R 78 0.0 3:33.31 loop
2684 mingo 20 0 1576 244 196 R 77 0.0 3:27.52 loop
so they now nicely converge to the expected 80% long-term CPU usage.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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This adds a function that tells you if a given kernel virtual address
is hitting a PCI or ISA IO port permanent mapping or not. This is to
be used in the next patch to fix iomap APIs to properly unmap things.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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WARNING: vmlinux.o(.text+0x8124): Section mismatch: reference to .init.text:.iSeries_early_setup (between '.__start_initialization_iSeries' and '.__mmu_off')
WARNING: vmlinux.o(.text+0x8128): Section mismatch: reference to .init.text:.early_setup (between '.__start_initialization_iSeries' and '.__mmu_off')
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Commit 3d0e91f7ace12499c4b00088e9a6b1361e1bb0ca introduced a requirement
for vio_enable_interrupts which iSeires has never needed. So create a
dummy one.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Make sure the kerneldoc comments are up to date and relevant.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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Added its pci_id and implemented a quirk for it because this
controller needs to reset cmd and data when setting ios.
Signed-off-by: Leandro Dorileo <dorileo@ossystems.com.br>
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
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git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] Nail two more simple section mismatch errors
[IA64] fix section mismatch warnings
[IA64] rename partial_page
[IA64] Ensure that machvec is set up takes place before serial console
[IA64] vector-domain - fix vector_table
[IA64] vector-domain - handle assign_irq_vector(AUTO_ASSIGN)
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In 741f98fe298a73c9d47ed53703c1279a29718581 Sam added full
checking across the entire vmlinux image. This flushed out
a dozen new section mismatch warnings. Start the whack-a-mole
game again to stomp them out.
Signed-off-by: Tony Luck <tony.luck@intel.com>
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Jens has added a partial_page thing in splice whcih conflicts with the ia64
one. Rename ia64 out of the way. (ia64 chose poorly).
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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struct apm_bios_info uses "unsigned short" and "unsigned long"
to mean u16 and u32 respectively. Correct.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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Make "struct ist_info" valid on both i386 and x86-64, and use the
structure by name in the setup code. Additionally, "Intel SpeedStep
IST" is redundant, refer to it as IST consistently.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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Fix missing letters in the structure members of struct efi_info.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6:
ACPI: Kconfig: remove CONFIG_ACPI_SLEEP from source
ACPI: quiet ACPI Exceptions due to no _PTC or _TSS
ACPI: Remove references to ACPI_STATE_S2 from acpi_pm_enter
ACPI: Kconfig: always enable CONFIG_ACPI_SLEEP on X86
ACPI: Kconfig: fold /proc/acpi/sleep under CONFIG_ACPI_PROCFS
ACPI: Kconfig: CONFIG_ACPI_PROCFS now defaults to N
ACPI: autoload modules - Create __mod_acpi_device_table symbol for all ACPI drivers
ACPI: autoload modules - Create ACPI alias interface
ACPI: autoload modules - ACPICA modifications
ACPI: asus-laptop: Fix failure exits
ACPI: fix oops due to typo in new throttling code
ACPI: ignore _PSx method for hotplugable PCI devices
ACPI: Use ACPI methods to select PCI device suspend state
ACPI, PNP: hook ACPI D-state to PNP suspend/resume
ACPI: Add acpi_pm_device_sleep_state helper routine
ACPI: Implement the set_target() callback from pm_ops
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Parse the machvec command line option outside of the early_param()
so that ia64_mv is set before any console intialisation that
may result from early_param parsing.
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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Fix types used for reset register address setup.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Need an include/asm-m68knommu/hw_irq.h for kernel/hrtimer.c
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix a small typo in the definition of MCFDMA_DIR_INV (MCF5272 specific).
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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CLOCK_TICK_RATE should give the underlying frequency of the tick timer,
to make ntp happy. For Coldfires, that's the main clock.
Signed-off-by: Philippe De Muyter <phdm@macqel.be>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This avoids xtime lag seen with dynticks, because while 'xtime' itself
is still not updated often, we keep a 'xtime_cache' variable around that
contains the approximate real-time that _is_ updated each time we do a
'update_wall_time()', and is thus never off by more than one tick.
IOW, this restores the original semantics for 'xtime' users, as long as
you use the proper abstraction functions (ie 'current_kernel_time()' or
'get_seconds()' depending on whether you want a timespec or just the
seconds field).
[ Updated Patch. As penance for my sins I've also yanked another #ifdef
that was added to avoid the xtime lag w/ hrtimers. ]
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This avoids use of the kernel-internal "xtime" variable directly outside
of the actual time-related functions. Instead, use the helper functions
that we already have available to us.
This doesn't actually change any behaviour, but this will allow us to
fix the fact that "xtime" isn't updated very often with CONFIG_NO_HZ
(because much of the realtime information is maintained as separate
offsets to 'xtime'), which has caused interfaces that use xtime directly
to get a time that is out of sync with the real-time clock by up to a
third of a second or so.
Signed-off-by: John Stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Conflicts:
drivers/acpi/sleep/main.c
Signed-off-by: Len Brown <len.brown@intel.com>
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As it was a synonym for (CONFIG_ACPI && CONFIG_X86),
the ifdefs for it were more clutter than they were worth.
For ia64, just add a few stubs in anticipation of future
S3 or S4 support.
Signed-off-by: Len Brown <len.brown@intel.com>
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master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc
* 'for_paulus' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc: (25 commits)
[POWERPC] 85xx: Added needed MPC85xx PCI device IDs
[POWERPC] Add Freescale PCI VENDOR ID and 8641 device IDs
[POWERPC] 85xxCDS: MPC8548 DTS cleanup.
[POWERPC] 85xxCDS: Misc 8548 PCI Corrections.
[POWERPC] 85xxCDS: Delay 8259 cascade hookup.
[POWERPC] 85xxCDS: Make sure restart resets the PCI bus.
[POWERPC] 85xxCDS: Allow 8259 cascade to share an MPIC interrupt line.
[POWERPC] FSL: Add support for PCI-X controllers
[POWERPC] Make sure virtual P2P bridge registers are setup on PCIe PHB
[POWERPC] Provide ability to setup P2P bridge registers from struct resource
[POWERPC] Add basic PCI/PCI Express support for 8544DS board
[POWERPC] Make endianess of cfg_addr for indirect pci ops runtime
[POWERPC] Removed setup_indirect_pci_nomap
[POWERPC] 85xx: Add quirk to ignore bogus FPGA on CDS
[POWERPC] 85xx: Added 8568 PCIe support
[POWERPC] Fixup resources on pci_bus for PCIe PHB when no device is connected
[POWERPC] Add basic PCI node for mpc8568mds board
[POWERPC] Use Freescale pci/pcie common code for 85xx boards
[POWERPC] Update PCI nodes in the 83xx/85xx boards device tree
[POWERPC] Add 8548 CDS PCI express controller node and PCI-X device node
...
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* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
[MIPS] Fix marge error due to conflict in arch/mips/kernel/head.S
[MIPS] ARC: Remove unused arch/mips/arc/console.c
[MIPS] SNI: sniprom
[MIPS] Jazz: remove unneeded reset functions
[MIPS] Whitespace cleanup.
[MIPS] Make resources for ds1742 "static __initdata"
[MIPS] Replace __attribute_used__ with __used
[MIPS] Jazz: Remove unused arch/mips/jazz/io.c
[MIPS] Mark prom_free_prom_memory as __init_refok
[MIPS] MIPSsim: Fix cflags
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master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
pata_hpt37x: Fix 2.6.22 clock PLL regression
pata_ali: Correct HP detect
ata_piix: fix suspend/resume for some TOSHIBA laptops
PCI: export __pci_reenable_device()
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master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (26 commits)
netdev: i82596 Ethernet needs <asm/cacheflush.h>
forcedeth: mcp73 device addition
forcedeth: new device ids in pci_ids.h
atl1: make atl1_init_ring_ptrs static
eHEA: net_poll support
drivers/net/acenic.c: fix check-after-use
defxx: Use __maybe_unused rather than a local hack
Fix error checking in Vitesse IRQ config
ps3: reduce allocation size of rx skb buffers
atl1: use kernel provided ethernet length constants
atl1: fix typo in dma_req_block
atl1: change cmb write threshold
atl1: fix typo in DMA engine setup
atl1: change tpd_avail function name
ps3: fix rare issue that reenabling rx DMA fails
ps3: removed calling netif_poll_enable() in open()
ps3: use ethX as the name of irq
ps3: use net_device_stats of net_device structure
ps3: removed conditional ethtool support
ps3: removed defines no longer used
...
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ACPI implementations in several TOSHIBA laptops are weird and burn cpu
cycles for tens of seconds while trying to suspend if the PCI device
for the ATA controller is disabled when the ACPI suspend is called.
This patch uses DMI to match those machines and bypass device disable
on those machines during suspend. As the device needs to be put into
enabled state on resume without affecting PCI enable count, matching
resume callback uses __pci_reenable_device().
This bug is reported in bugzilla bug 7780.
http://bugzilla.kernel.org/show_bug.cgi?id=7780
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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Some odd ACPI implementations choke if certain controller is disabled
when ACPI suspend is invoked but we still need to make sure the PCI
device is enabled during resume. Simply using pci_enable_device()
unbalances device enable count. Export __pci_reenable_device().
Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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This patch contains new device ids for MCP73 chipset.
Signed-Off-By: Ayaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
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* 'request-queue-t' of git://git.kernel.dk/linux-2.6-block:
[BLOCK] Add request_queue_t and mark it deprecated
[BLOCK] Get rid of request_queue_t typedef
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include/linux/loop.h:66: error: expected specifier-qualifier-list before 'request_queue_t'
Cc: Sebastian Siewior <sebastian@breakpoint.cc>
Cc: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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CC kernel/time/clocksource.o
In file included from
/home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/include/linux/clocksource.h:18,
from
/home/bunk/linux/kernel-2.6/linux-2.6.22-rc6-mm1/kernel/time/clocksource.c:27:
include2/asm/io.h: In function 'virt_to_phys':
include2/asm/io.h:46: error: implicit declaration of function '__pa'
include2/asm/io.h: In function 'phys_to_virt':
include2/asm/io.h:51: error: implicit declaration of function '__va'
include2/asm/io.h:51: warning: return makes pointer from integer without a cast
make[3]: *** [kernel/time/clocksource.o] Error 1
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: Christian Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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At present, various parts of the serial code use unsigned long to define
resource addresses. This is a problem, because some 32-bit platforms have
physical addresses larger than 32-bits, and have mmio serial uarts located
above the 4GB point.
This patch changes the type of mapbase in both struct uart_port and struct
plat_serial8250_port to resource_size_t, which can be configured to be 64
bits on such platforms. The mapbase in serial_struct can't safely be
changed, because that structure is user visible.
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Just using #defines for the
bsg_register_queue()/bsg_unregister_queue() can cause undefined
variables when they're defined to nothing. Use dummy inline functions
instead.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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Added the MPC85xx PCI device IDs that we need for the quirks we have.
Also, fixed the MPC8567E, MPC8567 device IDs which had the wrong value.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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Also add 8641/8641D device IDs as well.
All of which already exist or have been submitted to
The Linux PCI ID Repository at:
http://pci-ids.ucw.cz/
CC-to: pci-ids@ucw.cz
Signed-off-by: Jon Loeliger <jdl@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Andrew thinks I should be nice and allow outside code to at least just
compile, so add the request_queue_t typedef back and mark it deprecated.
It'll warn people that this type is going away soonish.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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Signed-off-by: Bryan Wu <bryan.wu@analog.com>
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Some of the code has been gradually transitioned to using the proper
struct request_queue, but there's lots left. So do a full sweet of
the kernel and get rid of this typedef and replace its uses with
the proper type.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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We need the ability to set P2P bridge registers to properly setup the virtual
P2P bridges that exist in PCIe controllers for some of the embedded setups.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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Make it so we do a runtime check to know if we need to write cfg_addr
as big or little endian. This is needed if we want to allow 86xx support
to co-exist in the same kernel as other 6xx PPCs.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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This replaces the current linear search for a unique minor number with
lib/idr.c.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
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Modify modpost (file2alias.c) to add acpi*:XYZ0001: alias in modules.alias
like:
grep acpi /lib/modules/2.6.22-rc4-default/modules.alias
alias acpi*:SNY5001:* sony_laptop
alias acpi*:SNY6001:* sony_laptop
for e.g. the sony_laptop module.
This module matches against all ACPI devices with a HID or CID of SNY5001
or SNY6001
Export an uevent and modalias sysfs file containing the string:
[MODALIAS=]acpi:PNP0C0C:
additional CIDs are concatenated at the end.
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Len Brown <len.brown@intel.com>
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Define standardized HIDs - Rename current acpi_device_id to acpica_device_id
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
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We don't use setup_indirect_pci_nomap in arch/powerpc and it appears
the users that needed it from arch/ppc are now using setup_indirect_pci.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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Added PPC_INDIRECT_TYPE_NO_PCIE_LINK flag to the indirect pci handling
code to ensure that we don't talk to any device other than the PHB
if we don't have PCIe link. Some controllers will lockup if they try
to do a config cycle to any device on the bus except the PHB.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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