uml: pthreads instead of manual clone()?
Hi Jeff, is there (still) any reason to use explicit clone() instead of pthreads to spawn UML kernel threads? While playing with a patch to finally move os_nsecs to proper CLOCK_MONOTONIC, I noticed some subtle side-effect: We need to link against librt for clock_gettime, but that indirectly drags in libpthre... 17 May 2010 11:18
[PATCH 3/3] [PATCH] ipc/sem.c: cacheline align the ipc spinlock for semaphores
This patch cacheline aligns the spinlock for sysv semaphores: Without the patch, the spinlock and sem_otime [written by every semop that modified the array] and sem_base [read in the hot path of try_atomic_semop()] can be in the same cacheline. --- include/linux/sem.h | 4 +++- 1 files changed, 3 insertions(+... 18 Apr 2010 14:10
[PATCH] uml: Fix build breakage after slab.h changes
We now have to to include linux/slab.h explicitly for kmalloc & friends. Files that build against host headers already get their prototypes via um_malloc.h, linux/slab.h may even be unavailable. Signed-off-by: Jan Kiszka <jan.kiszka(a)web.de> --- arch/um/drivers/line.c | 1 + arch/um/os-Linux/helper.c | ... 18 Apr 2010 13:03
[RFC patch] CFS fix place entity spread issue (v2)
CFS fix place entity spread issue (v2) Huge CFS vruntime spread (18 minutes) has been observed with LTTng while simply running Xorg on a uniprocessor machine. Detailed explanation in my ELC2010 presentation at: http://www.efficios.com/elc2010 (includes slides, ad-hoc CFS instrumentation patches and wakeup la... 18 Apr 2010 09:44
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i2c-core: fix some coding style issues in i2c-core.c
Hi Farid, On Sun, 18 Apr 2010 10:41:07 +0200, Farid Hammane wrote: This is a patch to the i2c-core.c file that fixes up coding style issues found by the checkpatch.pl tool Signed-off-by: Farid Hammane <farid.hammane(a)gmail.com> --- drivers/i2c/i2c-core.c | 86 ++++++++++++++++++++++++---------------... 18 Apr 2010 07:34
[RFC patch] CFS fix place entity spread issue
Huge CFS vruntime spread (18 minutes) has been observed with LTTng while simply running Xorg on a uniprocessor machine, 2.6.33.2 kernel. Detailed explanation in my ELC2010 presentation at: http://www.efficios.com/elc2010 (includes slides, ad-hoc CFS instrumentation patches and wakeup latency test program) I... 18 Apr 2010 04:16
Change some config options to be automatically selected
> I'm not sure if there is anyone who feels really the maintainer of the platform-x86 directory Matthew Garrett maintains the platform-x86 directory. Cheers, -Len ... 17 Apr 2010 22:54
srcu: add missing header file
On Sat, Apr 17, 2010 at 07:13:53PM +0800, Lai Jiangshan wrote: When I was writing a module, I hit this compile error. include/linux/srcu.h:39: error: field 'mutex' has incomplete type include/linux/srcu.h:41: error: field 'dep_map' has incomplete type mutex.h is missed in srcu.h, but srcu.h uses str... 17 Apr 2010 21:49
fs/partitions: use ADDPART_FLAG_RAID instead of magic number
From: Cesar Eduardo Barros <cesarb(a)cesarb.net> Date: Sat, 17 Apr 2010 19:28:09 -0300 ADDPART_FLAG_RAID was introduced in commit d18d768, and most places were converted to use it instead of a hardcoded value. However, some places seem to have been missed. Change all of them to the symbolic names via t... 17 Apr 2010 19:39