linux-toradex.git/Documentation/cgroups/cpusets.txt, branch v3.18-rc5

cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags

2014-09-25T02:16:06+00:00

When we change cpuset.memory_spread_{page,slab}, cpuset will flip
PF_SPREAD_{PAGE,SLAB} bit of tsk->flags for each task in that cpuset.
This should be done using atomic bitops, but currently we don't,
which is broken.

Tetsuo reported a hard-to-reproduce kernel crash on RHEL6, which happened
when one thread tried to clear PF_USED_MATH while at the same time another
thread tried to flip PF_SPREAD_PAGE/PF_SPREAD_SLAB. They both operate on
the same task.

Here's the full report:
https://lkml.org/lkml/2014/9/19/230

To fix this, we make PF_SPREAD_PAGE and PF_SPREAD_SLAB atomic flags.

v4:
- updated mm/slab.c. (Fengguang Wu)
- updated Documentation.

Cc: Peter Zijlstra 
Cc: Ingo Molnar 
Cc: Miao Xie 
Cc: Kees Cook 
Fixes: 950592f7b991 ("cpusets: update tasks' page/slab spread flags in time")
Cc:  # 2.6.31+
Reported-by: Tetsuo Handa 
Signed-off-by: Zefan Li 
Signed-off-by: Tejun Heo

sched: Rename sched.c as sched/core.c in comments and Documentation

2013-06-19T10:58:42+00:00

Most of the stuff from kernel/sched.c was moved to kernel/sched/core.c long time
back and the comments/Documentation never got updated.

I figured it out when I was going through sched-domains.txt and so thought of
fixing it globally.

I haven't crossed check if the stuff that is referenced in sched/core.c by all
these files is still present and hasn't changed as that wasn't the motive behind
this patch.

Signed-off-by: Viresh Kumar 
Signed-off-by: Peter Zijlstra 
Link: http://lkml.kernel.org/r/cdff76a265326ab8d71922a1db5be599f20aad45.1370329560.git.viresh.kumar@linaro.org
Signed-off-by: Ingo Molnar

cpuset: use N_MEMORY instead N_HIGH_MEMORY

2012-12-13T01:38:32+00:00

N_HIGH_MEMORY stands for the nodes that has normal or high memory.
N_MEMORY stands for the nodes that has any memory.

The code here need to handle with the nodes which have memory, we should
use N_MEMORY instead.

Signed-off-by: Lai Jiangshan 
Acked-by: Hillf Danton 
Signed-off-by: Wen Congyang 
Cc: Christoph Lameter 
Cc: Lin Feng 
Cc: David Rientjes 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

documentation: remove references to cpu_*_map.

2012-03-29T05:08:31+00:00

This has been obsolescent for a while, fix documentation and
misc comments.

Signed-off-by: Rusty Russell

Documentation: fix ambigous text for root cpuset

2011-07-23T17:58:08+00:00

Only the root cpuset has cpuset.memory_pressure_enabled flag,
but not the only one.

Signed-off-by: Wanlong Gao 
Signed-off-by: Randy Dunlap 
Acked-by: Paul Menage 
Signed-off-by: Linus Torvalds

Documentation: update cgroupfs mount point

2011-06-16T04:52:50+00:00

According to commit 676db4af0430 ("cgroupfs: create /sys/fs/cgroup to
mount cgroupfs on") the canonical mountpoint for the cgroup filesystem
is /sys/fs/cgroup.  Hence, this should be used in the documentation.

Signed-off-by: Jörg Sommer 
Acked-by: Paul Menage 
Signed-off-by: Randy Dunlap 
Signed-off-by: Linus Torvalds

Update cpuset info & webiste for cgroups

2011-03-08T22:12:39+00:00

cpuset related websited is changed.
and, update list of cpuset using cgroup(controller group).

Signed-off-by: Geunsik Lim 
Acked-by: Paul Menage 
Signed-off-by: Jiri Kosina

Documentation: update broken web addresses.

2010-08-04T13:21:40+00:00

Below you will find an updated version from the original series bunching all patches into one big patch
updating broken web addresses that are located in Documentation/*
Some of the addresses date as far far back as 1995 etc... so searching became a bit difficult,
the best way to deal with these is to use web.archive.org to locate these addresses that are outdated.
Now there are also some addresses pointing to .spec files some are located, but some(after searching
on the companies site)where still no where to be found. In this case I just changed the address
to the company site this way the users can contact the company and they can locate them for the users.

Signed-off-by: Justin P. Mattock 
Signed-off-by: Thomas Weber 
Signed-off-by: Mike Frysinger 
Cc: Paulo Marques 
Cc: Randy Dunlap 
Cc: Michael Neuling 
Signed-off-by: Jiri Kosina

cpuset: Fix documentation punctuation

2010-03-25T09:19:29+00:00

Fix cpusets.txt documentation punctuation.

Signed-off-by: Greg Thelen 
Acked-by: Randy Dunlap 
Acked-by: Paul Menage 
Signed-off-by: Jiri Kosina

doc: cpuset: Update the cpuset flag file

2010-02-24T10:06:39+00:00

This patch is for modifying with correct cuset flag file.  We need to update
current manual for cpuset.  For example, before) cpus, cpu_exclusive, mems
after ) cpuset.cpus, cpuset.cpu_exclusive, cpuset.mems

Signed-off-by: Geunsik Lim 
Acked-by: Paul Menage 
Signed-off-by: Jiri Kosina