Kernel

[PATCH 0/4] Wall time clocks + change in access rules
During our work we encountered a problem of obtaining a reliable and fine-grained measurements of CPU time/wall time of a process/thread. The existing methods (taskstats, procfs, POSIX CPU clocks) have either unfriendly interface (taskstats) or give unsatisfactory precision (procfs). However, even the most precise... 21 Jul 2010 14:43

[PATCH] i2c: Single-wire Serial Bus Interface for Qualcomm MSM chipsets
This bus driver supports the Single-wire Serial Bus Interface (SSBI) controller in the Qualcomm MSM SOCs. SSBI is not an I2C but is functionally related enough such that it is able to leaverage the I2C framework. Unlike I2C, SSBI is a point-to-point connection, and therefore there is no need to specify a slave ... 21 Jul 2010 14:43

Soft lockup debug for arm (at91sam9g20)
Hi. I try to run a linux with the preempt rt patch on my board (an at91sam9g20 based board). I have an error message, but i need help to understand where i should search. Here is the message : Freeing init memory: 108K BUG: soft lockup - CPU#0 stuck for 61s! [rcS:165] irq event stamp: 0 ... 21 Jul 2010 14:43

[PATCH] x86: Do not try to disable hpet if it hasn't been initialized before
hpet_disable is called unconditionally on machine reboot if hpet support is compiled in the kernel. hpet_disable only checks if the machine is hpet capable but doesn't make sure that hpet has been initialized. Signed-off-by: Stefano Stabellini <stefano.stabellini(a)eu.citrix.com> Acked-by: Venkatesh Pallipadi <ven... 21 Jul 2010 14:43

kernel/panic.c warn_slowpath_common printk timestamp weirdness
On Wed, 21 Jul 2010 06:36:41 PDT, Arjan van de Ven said: On 7/21/2010 5:54 AM, Valdis.Kletnieks(a)vt.edu wrote: Seeing this on my Dell Latitude. The timestamps from the 'cut here' and WARNING lines are different even though they're issued by sequential lines in panic.c - but then the printk timestamp... 21 Jul 2010 14:43

[PATCH 4/7] x86, xsave: make init_xstate_buf static
The pointer is only used in xsave.c. Making it static. Signed-off-by: Robert Richter <robert.richter(a)amd.com> --- arch/x86/include/asm/xsave.h | 1 - arch/x86/kernel/xsave.c | 10 +++++----- 2 files changed, 5 insertions(+), 6 deletions(-) diff --git a/arch/x86/include/asm/xsave.h b/arch/x86/includ... 21 Jul 2010 13:34

[PATCH 1/7] x86, xsave: separate fpu and xsave initialization
As xsave also supports other than fpu features, it should be initialized independently of the fpu. This patch moves this out of fpu initialization. There is also a lot of cross referencing between fpu and xsave code. This patch reduces this by making xsave_cntxt_init() and init_thread_xstate() static functions. ... 21 Jul 2010 13:34

[PATCH 5/7] x86, xsave: add __init attribute to setup_xstate_features()
This is called only from initialization code. Signed-off-by: Robert Richter <robert.richter(a)amd.com> --- arch/x86/kernel/xsave.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c index 3b44a9b..cfc7901 100644 --- a/arch/x86/kernel/xsav... 21 Jul 2010 13:34

[PATCH 2/7] x86, xsave: introduce xstate enable functions
The patch renames xsave_cntxt_init() and __xsave_init() into xstate_enable_boot_cpu() and xstate_enable() as this names are more meaningful. It also removes the duplicate xcr setup for the boot cpu. Signed-off-by: Robert Richter <robert.richter(a)amd.com> --- arch/x86/kernel/xsave.c | 19 ++++++++----------- ... 21 Jul 2010 13:34

[PATCH 0/7] x86, xsave: some code cleanups and reworks, -v2
Hans Peter, Suresh, and Cyrill, thanks for your feedback. This is version 2 of the patch series. Patches 2, 4, 7 are unchanged compared to -v1. Patch 1 folds the initialization code into one patch. fpu_init() is now called before xsave_init(). xsave_init() can later overwrite xstate_size based on xstate feat... 21 Jul 2010 13:34