From: Glauber Costa <glommer-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
To: Kamezawa Hiroyuki
<kamezawa.hiroyu-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
Cc: David Rientjes <rientjes-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>,
Michal Hocko <mhocko-AlSwsSmVLrQ@public.gmane.org>,
Hugh Dickins <hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org
Subject: Re: [patch] mm, memcg: avoid unnecessary function call when memcg is disabled
Date: Tue, 20 Nov 2012 12:34:29 +0400 [thread overview]
Message-ID: <50AB4095.6000502@parallels.com> (raw)
In-Reply-To: <50AB05B4.4000303-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
On 11/20/2012 08:23 AM, Kamezawa Hiroyuki wrote:
> (2012/11/20 10:44), David Rientjes wrote:
>> While profiling numa/core v16 with cgroup_disable=memory on the command
>> line, I noticed mem_cgroup_count_vm_event() still showed up as high as
>> 0.60% in perftop.
>>
>> This occurs because the function is called extremely often even when
>> memcg
>> is disabled.
>>
>> To fix this, inline the check for mem_cgroup_disabled() so we avoid the
>> unnecessary function call if memcg is disabled.
>>
>> Signed-off-by: David Rientjes <rientjes-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
>
> Acked-By: KAMEZAWA Hiroyuki <kamezawa.hiroyu-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
>
I am fine with this as well.
Acked-by: Glauber Costa <glommer-bzQdu9zFT3WakBO8gow8eQ@public.gmane.org>
next prev parent reply other threads:[~2012-11-20 8:34 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-20 1:44 [patch] mm, memcg: avoid unnecessary function call when memcg is disabled David Rientjes
[not found] ` <alpine.DEB.2.00.1211191741060.24618-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-11-20 4:23 ` Kamezawa Hiroyuki
[not found] ` <50AB05B4.4000303-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2012-11-20 8:34 ` Glauber Costa [this message]
2012-11-20 17:27 ` Johannes Weiner
2012-11-20 21:49 ` Andrew Morton
[not found] ` <20121120134932.055bc192.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2012-11-21 1:02 ` Kamezawa Hiroyuki
2012-11-21 2:48 ` [patch] mm, memcg: avoid unnecessary function call when memcg is disabled fix David Rientjes
[not found] ` <alpine.DEB.2.00.1211201847450.2278-X6Q0R45D7oAcqpCFd4KODRPsWskHk0ljAL8bYrjMMd8@public.gmane.org>
2012-11-21 4:11 ` Kamezawa Hiroyuki
2012-11-21 8:35 ` [patch] mm, memcg: avoid unnecessary function call when memcg is disabled Michal Hocko
2012-11-28 23:29 ` Hugh Dickins
[not found] ` <alpine.LNX.2.00.1211281509560.15410-fupSdm12i1nKWymIFiNcPA@public.gmane.org>
2012-11-29 13:28 ` [PATCH] memcg: do not check for mm in mem_cgroup_count_vm_event disabled Michal Hocko
2012-11-20 7:07 ` [patch] mm, memcg: avoid unnecessary function call when memcg is disabled Michal Hocko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=50AB4095.6000502@parallels.com \
--to=glommer-bzqdu9zft3wakbo8gow8eq@public.gmane.org \
--cc=akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org \
--cc=cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org \
--cc=hughd-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org \
--cc=kamezawa.hiroyu-+CUm20s59erQFUHtdCDX3A@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org \
--cc=mhocko-AlSwsSmVLrQ@public.gmane.org \
--cc=rientjes-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).