kernel.git/arch/x86/kernel/tsc.c, branch linux-2.6.37.y

Merge branch 'x86-amd-nb-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-10-21T20:01:08Z

* 'x86-amd-nb-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, amd_nb: Enable GART support for AMD family 0x15 CPUs x86, amd: Use compute unit information to determine thread siblings x86, amd: Extract compute unit information for AMD CPUs x86, amd: Add support for CPUID topology extension of AMD CPUs x86, nmi: Support NMI watchdog on newer AMD CPU families x86, mtrr: Assume SYS_CFG[Tom2ForceMemTypeWB] exists on all future AMD CPUs x86, k8: Rename k8.[ch] to amd_nb.[ch] and CONFIG_K8_NB to CONFIG_AMD_NB x86, k8-gart: Decouple handling of garts and northbridges x86, cacheinfo: Fix dependency of AMD L3 CID x86, kvm: add new AMD SVM feature bits x86, cpu: Fix allowed CPUID bits for KVM guests x86, cpu: Update AMD CPUID feature bits x86, cpu: Fix renamed, not-yet-shipping AMD CPUID feature bit x86, AMD: Remove needless CPU family check (for L3 cache info) x86, tsc: Remove CPU frequency calibration on AMD

x86: Add IRQ_TIME_ACCOUNTING

2010-10-18T18:52:25Z

This patch adds IRQ_TIME_ACCOUNTING option on x86 and runtime enables it when TSC is enabled. This change just enables fine grained irq time accounting, isn't used yet. Following patches use it for different purposes. Signed-off-by: Venkatesh Pallipadi Signed-off-by: Peter Zijlstra LKML-Reference: <1286237003-12406-6-git-send-email-venki@google.com> Signed-off-by: Ingo Molnar

Merge remote branch 'origin/x86/cpu' into x86/amd-nb

2010-10-01T23:18:11Z

x86, tsc: Fix a preemption leak in restore_sched_clock_state()

2010-09-11T01:17:45Z

A real life genuine preemption leak.. Reported-and-tested-by: Jeff Chua Signed-off-by: Peter Zijlstra Acked-by: Suresh Siddha Signed-off-by: Linus Torvalds

x86, tsc: Remove CPU frequency calibration on AMD

2010-08-25T20:32:52Z

6b37f5a20c0e5c334c010a587058354215433e92 introduced the CPU frequency calibration code for AMD CPUs whose TSCs didn't increment with the core's P0 frequency. From F10h, revB onward, however, the TSC increment rate is denoted by MSRC001_0015[24] and when this bit is set (which should be done by the BIOS) the TSC increments with the P0 frequency so the calibration is not needed and booting can be a couple of mcecs faster on those machines. Besides, there should be virtually no machines out there which don't have this bit set, therefore this calibration can be safely removed. It is a shaky hack anyway since it assumes implicitly that the core is in P0 when BIOS hands off to the OS, which might not always be the case. Signed-off-by: Borislav Petkov LKML-Reference: <20100825162823.GE26438@aftab> Signed-off-by: H. Peter Anvin

x86, tsc, sched: Recompute cyc2ns_offset's during resume from sleep states

2010-08-20T12:59:02Z

TSC's get reset after suspend/resume (even on cpu's with invariant TSC which runs at a constant rate across ACPI P-, C- and T-states). And in some systems BIOS seem to reinit TSC to arbitrary large value (still sync'd across cpu's) during resume. This leads to a scenario of scheduler rq->clock (sched_clock_cpu()) less than rq->age_stamp (introduced in 2.6.32). This leads to a big value returned by scale_rt_power() and the resulting big group power set by the update_group_power() is causing improper load balancing between busy and idle cpu's after suspend/resume. This resulted in multi-threaded workloads (like kernel-compilation) go slower after suspend/resume cycle on core i5 laptops. Fix this by recomputing cyc2ns_offset's during resume, so that sched_clock() continues from the point where it was left off during suspend. Reported-by: Florian Pritz Signed-off-by: Suresh Siddha Cc: # [v2.6.32+] Signed-off-by: Peter Zijlstra LKML-Reference: <1282262618.2675.24.camel@sbsiddha-MOBL3.sc.intel.com> Signed-off-by: Ingo Molnar

x86: Convert common clocksources to use clocksource_register_hz/khz

2010-07-27T10:40:55Z

This converts the most common of the x86 clocksources over to use clocksource_register_hz/khz. Signed-off-by: John Stultz LKML-Reference: <1279068988-21864-11-git-send-email-johnstul@us.ibm.com> Signed-off-by: Thomas Gleixner

Merge branch 'for-next' into for-linus

2010-03-08T15:55:37Z

Conflicts: Documentation/filesystems/proc.txt arch/arm/mach-u300/include/mach/debug-macro.S drivers/net/qlge/qlge_ethtool.c drivers/net/qlge/qlge_main.c drivers/net/typhoon.c

Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-03-01T16:48:25Z

* 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: posix-timers.c: Don't export local functions clocksource: start CMT at clocksource resume clocksource: add suspend callback clocksource: add argument to resume callback ntp: Cleanup xtime references in ntp.c ntp: Make time_esterror and time_maxerror static

tree-wide: Assorted spelling fixes

2010-02-09T10:13:56Z

In particular, several occurances of funny versions of 'success', 'unknown', 'therefore', 'acknowledge', 'argument', 'achieve', 'address', 'beginning', 'desirable', 'separate' and 'necessary' are fixed. Signed-off-by: Daniel Mack Cc: Joe Perches Cc: Junio C Hamano Signed-off-by: Jiri Kosina