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2007-07-26[PATCH] sched: arch preempt notifier mechanismAvi Kivity
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>
2007-07-26[PATCH] sched: increase SCHED_LOAD_SCALE_FUZZIngo Molnar
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>
2007-07-25Merge branch 'release' of ↵Linus Torvalds
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)
2007-07-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuildLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: kbuild: fix modpost warnings for xtensa kbuild: be more foregiving on init section naming kbuild: rearrange a few function in modpost kbuild: use LDFLAGS_MODULE only for .ko links kconfig: remove unused members from struct symbol kconfig: attach help text to menus kbuild: fix up printing of Linux C Library version in scripts/ver_linux kbuild: do not do section mismatch checks on vmlinux in 2nd pass
2007-07-25kbuild: fix modpost warnings for xtensaSam Ravnborg
The Xtensa architecture places literal pools in sections separate from the instructions. The corresponsing text sections, therefore, reference the .literal section, and we have to suppress those warnings. The naming convention defines the name for a literal section as .SECTION.literal, unless .SECTION is .text. In that case the name is only .literal. Using strncmp() instead of strcmp() to compare the from-section with .SECTION.init.refok in pattern 0 should not cause any regressions for other architectures. We also need to suppress warnings for two informational sections (.xt.lit and .xt.prop) used by the Xtensa architecture. Signed-off-by: Chris Zankel <chris@zankel.net> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-07-25[IA64] Nail two more simple section mismatch errorsTony Luck
pcibios_setup (between 'pci_setup' and 'quirk_mellanox_tavor') setup_profiling_timer (between 'write_profile' and 'delayed_put_task_struct') Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-07-25[IA64] fix section mismatch warningsTony Luck
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>
2007-07-25[IA64] rename partial_pageakpm@linux-foundation.org
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>
2007-07-25kbuild: be more foregiving on init section namingSam Ravnborg
In the whitelist function of modpost now use the same check to identify init_section as in other places of modpost. This has the effect that we now recognize sections named .init.text.19 as init sections and we no longer warn when we see these. At the same time make surrounding code readable by dropping use of temporary flags. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-07-25kbuild: rearrange a few function in modpostSam Ravnborg
This is a preparational patch that just move two functions and add one (for now unused) function. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-07-25kbuild: use LDFLAGS_MODULE only for .ko linksRoland McGrath
Sam Ravnborg pointed out that Documentation/kbuild/makefiles.txt already says this is what it's for. This patch makes the reality live up to the documentation. This fixes the problem of LDFLAGS_BUILD_ID getting into too many places. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-07-25kconfig: remove unused members from struct symbolSam Ravnborg
dep and dep2 in struct symbol was unused - remove them. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Roman Zippel <zippel@linux-m68k.org>
2007-07-25kconfig: attach help text to menusSam Ravnborg
Roman Zippel wrote: > A simple example would be > help texts, right now they are per symbol, but they should really be per > menu, so archs can provide different help texts for something. This patch does this and at the same time introduce a few API funtions used to access the help text. The relevant api functions are introduced in the various frontends. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Roman Zippel <zippel@linux-m68k.org>
2007-07-25kbuild: fix up printing of Linux C Library version in scripts/ver_linuxJesper Juhl
I noticed, when running scripts/ver_linux on both a Gentoo system and a Slackware system, that the line printing the C library version looked a little odd. So I fixed it up to be in line with all the rest. Old output: Linux C Library > libc.2.5 New output: Linux C Library 2.5 Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-07-25kbuild: do not do section mismatch checks on vmlinux in 2nd passSam Ravnborg
We already check and warn about section mismatches from vmlinux (build as vmlinux.o) during first pass so skip the checks during the 2nd pass where we process modules. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-07-25[x86 setup] Make struct apm_bios_info cross-architectureH. Peter Anvin
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>
2007-07-25[x86 setup] Make struct ist_info cross-architecture, and use in setup codeH. Peter Anvin
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>
2007-07-25[x86 setup] Fix typos in struct efi_infoH. Peter Anvin
Fix missing letters in the structure members of struct efi_info. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2007-07-25[x86 setup] APM: BX should be zero when disconnectingH. Peter Anvin
For APM calls, BX contains the device index, which is zero for the system BIOS. Disconnect requres BX = 0. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2007-07-25[x86 setup] APM detection logic bug fixMikael Pettersson
Starting with kernel 2.6.23-rc1, the i386 APM driver fails on several of my machines with the message: apm: BIOS not found This happens because of a bug in the i386 boot code rewrite from assembler to C. The original assembly code had the following code in its APM BIOS presence test (boot/setup.S): andw $0x02, %cx # Is 32 bit supported? je done_apm_bios # No 32-bit, no (good) APM BIOS That is, the code bails out if bit 2 is zero. In the new C version, this is coded as (boot/apm.c): if (cx & 0x02) /* 32 bits supported? */ return -1; Here we see that the test has been accidentally inverted. The fix is to negate the test. I've verified that this allows the APM driver to work again on my affected machines. Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2007-07-25Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/selinux-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/selinux-2.6: SELinux: null-terminate context string in selinux_xfrm_sec_ctx_alloc
2007-07-25Merge branch 'release' of ↵Linus Torvalds
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
2007-07-25[IA64] Ensure that machvec is set up takes place before serial consoleHorms
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>
2007-07-25[IA64] vector-domain - fix vector_tableKenji Kaneshige
Fix wrong access to vector_table[]. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-07-25[IA64] vector-domain - handle assign_irq_vector(AUTO_ASSIGN)Yasuaki Ishimatsu
This change fixes a panic when assign_irq_vector(irq) is called with irq = AUTO_ASSIGN. Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-07-25m68knommu: make BOOTPARAM setup commonGreg Ungerer
Currently most of the m68knommu cpu/board setup files are handling the setup of fixed boot parameters (via CONFIG_BOOTPARAM) themselves. Move all this into the common setup code. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-25m68knommu: fix reset register address castingGreg Ungerer
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>
2007-07-25m68knommu: add configure support for Intec boardsGreg Ungerer
Add configure support for the Intec Wildfire and WildFireMod boards. Signed-Off-By: Steve Bennett <steveb@workware.net.au> Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-25m68knommu: simplify ColdFire resume codeGreg Ungerer
It is useless to preserve THREAD_SR in `resume'. The real user's sr is actually in the stack. We also don't need to disable interrupts : we'll never be in an invalid state, the sp switch is atomic. 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>
2007-07-25m68knommu: create hw_irq.hGreg Ungerer
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>
2007-07-25m68knommu: fix definition of MCFDMA_DIR_INVPhilippe De Muyter
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>
2007-07-25m68knommu: add build support for more Arcturus boardsGreg Ungerer
Add build support for the new Arcturus boards. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-25m68knommu: need to include linux/device.h in dma.cGreg Ungerer
Need to explicitly include linux/device.h. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-25m68knommu: fix tick timer definition for coldfireGreg Ungerer
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>
2007-07-25m68knommu: add configure support for more Arcturus boardsDavid Wu
Add configure support for the Arcturus UC5272 and UC5282 boards. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-25m68knommu: fix workqueues in 68328 serial driverGreg Ungerer
Fix workqueues in 68328 serial driver. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-25m68knommu: remove legacy power managament from 68328 serial driverGreg Ungerer
Remove the legacy power management code from the 68328 serial driver. It is not used, and there is no current kernel support for power management on the 68328. Signed-off-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-25Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: KVM: disable writeback for 0x0f 0x01 instructions. KVM: Fix removal of nx capability from guest cpuid Revert "KVM: Avoid useless memory write when possible" KVM: Fix unlikely kvm_create vs decache_vcpus_on_cpu race KVM: Correctly handle writes crossing a page boundary
2007-07-25Cache xtime every call to update_wall_timejohn stultz
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>
2007-07-25Cleanup non-arch xtime uses, use get_seconds() or current_kernel_time().john stultz
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>
2007-07-25SELinux: null-terminate context string in selinux_xfrm_sec_ctx_allocVenkat Yekkirala
xfrm_audit_log() expects the context string to be null-terminated which currently doesn't happen with user-supplied contexts. Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
2007-07-25KVM: disable writeback for 0x0f 0x01 instructions.Aurelien Jarno
0x0f 0x01 instructions (ie lgdt, lidt, smsw, lmsw and invlpg) does not use writeback. This patch set no_wb=1 when emulating those instructions. This fixes a regression booting the FreeBSD kernel on AMD. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-07-25KVM: Fix removal of nx capability from guest cpuidAvi Kivity
Testing the wrong bit caused kvm not to disable nx on the guest when it is disabled on the host (an mmu optimization relies on the nx bits being the same in the guest and host). This allows Windows to boot when nx is disabled on te host (e.g. when host pae is disabled). Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-07-25Revert "KVM: Avoid useless memory write when possible"Avi Kivity
This reverts commit a3c870bdce4d34332ebdba7eb9969592c4c6b243. While it does save useless updates, it (probably) defeats the fork detector, causing a massive performance loss. Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-07-25KVM: Fix unlikely kvm_create vs decache_vcpus_on_cpu raceRusty Russell
We add the kvm to the vm_list before initializing the vcpu mutexes, which can be mutex_trylock()'ed by decache_vcpus_on_cpu(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-07-25KVM: Correctly handle writes crossing a page boundaryAvi Kivity
Writes that are contiguous in virtual memory may not be contiguous in physical memory; so split writes that straddle a page boundary. Thanks to Aurelien for reporting the bug, patient testing, and a fix to this very patch. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-07-25Pull auto-load-modules into release branchLen Brown
2007-07-25Pull d-states into release branchLen Brown
Conflicts: drivers/acpi/sleep/main.c Signed-off-by: Len Brown <len.brown@intel.com>
2007-07-25Pull kconfig into release branchLen Brown
2007-07-25ACPI: Kconfig: remove CONFIG_ACPI_SLEEP from sourceLen Brown
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>