lkml.org 
[lkml]   [2011]   [Aug]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] memcg: remove unneeded preempt_disable
On Wed, 17 Aug 2011 23:50:53 -0700
Greg Thelen <gthelen@google.com> wrote:

> Both mem_cgroup_charge_statistics() and mem_cgroup_move_account() were
> unnecessarily disabling preemption when adjusting per-cpu counters:
> preempt_disable()
> __this_cpu_xxx()
> __this_cpu_yyy()
> preempt_enable()
>
> This change does not disable preemption and thus CPU switch is possible
> within these routines. This does not cause a problem because the total
> of all cpu counters is summed when reporting stats. Now both
> mem_cgroup_charge_statistics() and mem_cgroup_move_account() look like:
> this_cpu_xxx()
> this_cpu_yyy()
>
> Reported-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
> Signed-off-by: Greg Thelen <gthelen@google.com>

Thank you.
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>



\
 
 \ /
  Last update: 2011-08-18 09:03    [W:0.162 / U:0.348 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site