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From: Johannes Weiner <hannes@cmpxchg.org>
To: linux-mm@kvack.org
Cc: Michal Hocko <mhocko@suse.cz>, Greg Thelen <gthelen@google.com>,
	Dave Hansen <dave@sr71.net>,
	cgroups@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [patch] mm: memcontrol: lockless page counters
Date: Fri, 19 Sep 2014 09:29:19 -0400	[thread overview]
Message-ID: <20140919132919.GA16184@cmpxchg.org> (raw)
In-Reply-To: <1411132928-16143-1-git-send-email-hannes@cmpxchg.org>

Hi Dave,

this patch removes the lock you saw with will-it-scale/page_fault2
entirely, is there a chance you could give it a spin?  It's based on
v3.17-rc4-mmots-2014-09-12-17-13-4 and that memcg THP fix.  That
kernel also includes the recent root-memcg revert, so you'd have to
run it in a memcg; which is as easy as:

mkdir /sys/fs/cgroup/memory/foo
echo $$ >/sys/fs/cgroup/memory/foo/tasks
perf record -g -a ./runtest.py page_fault2

Thanks!

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WARNING: multiple messages have this Message-ID (diff)
From: Johannes Weiner <hannes@cmpxchg.org>
To: linux-mm@kvack.org
Cc: Michal Hocko <mhocko@suse.cz>, Greg Thelen <gthelen@google.com>,
	Dave Hansen <dave@sr71.net>,
	cgroups@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [patch] mm: memcontrol: lockless page counters
Date: Fri, 19 Sep 2014 09:29:19 -0400	[thread overview]
Message-ID: <20140919132919.GA16184@cmpxchg.org> (raw)
In-Reply-To: <1411132928-16143-1-git-send-email-hannes@cmpxchg.org>

Hi Dave,

this patch removes the lock you saw with will-it-scale/page_fault2
entirely, is there a chance you could give it a spin?  It's based on
v3.17-rc4-mmots-2014-09-12-17-13-4 and that memcg THP fix.  That
kernel also includes the recent root-memcg revert, so you'd have to
run it in a memcg; which is as easy as:

mkdir /sys/fs/cgroup/memory/foo
echo $$ >/sys/fs/cgroup/memory/foo/tasks
perf record -g -a ./runtest.py page_fault2

Thanks!

  reply	other threads:[~2014-09-19 13:29 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-19 13:22 [patch] mm: memcontrol: lockless page counters Johannes Weiner
2014-09-19 13:22 ` Johannes Weiner
2014-09-19 13:29 ` Johannes Weiner [this message]
2014-09-19 13:29   ` Johannes Weiner
2014-09-22 14:41 ` Vladimir Davydov
2014-09-22 14:41   ` Vladimir Davydov
2014-09-22 18:57   ` Johannes Weiner
2014-09-22 18:57     ` Johannes Weiner
2014-09-22 18:57     ` Johannes Weiner
     [not found]     ` <20140922185736.GB6630-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2014-09-23 11:06       ` Vladimir Davydov
2014-09-23 11:06         ` Vladimir Davydov
2014-09-23 11:06         ` Vladimir Davydov
2014-09-23 13:28         ` Johannes Weiner
2014-09-23 13:28           ` Johannes Weiner
     [not found]           ` <20140923132801.GA14302-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2014-09-23 15:21             ` Vladimir Davydov
2014-09-23 15:21               ` Vladimir Davydov
2014-09-23 15:21               ` Vladimir Davydov
2014-09-23 17:05               ` Johannes Weiner
2014-09-23 17:05                 ` Johannes Weiner
2014-09-23 17:05                 ` Johannes Weiner
2014-09-24  8:02                 ` Vladimir Davydov
2014-09-24  8:02                   ` Vladimir Davydov
     [not found]                 ` <20140923170525.GA28460-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2014-09-24 13:33                   ` Michal Hocko
2014-09-24 13:33                     ` Michal Hocko
2014-09-24 13:33                     ` Michal Hocko
2014-09-24 16:51                     ` Johannes Weiner
2014-09-24 16:51                       ` Johannes Weiner
2014-09-24 14:16                 ` Michal Hocko
2014-09-24 14:16                   ` Michal Hocko
2014-09-24 17:00                   ` Johannes Weiner
2014-09-24 17:00                     ` Johannes Weiner
2014-09-25 13:07                     ` Michal Hocko
2014-09-25 13:07                       ` Michal Hocko
2014-09-22 14:44 ` Michal Hocko
2014-09-22 14:44   ` Michal Hocko
2014-09-22 15:50   ` Johannes Weiner
2014-09-22 15:50     ` Johannes Weiner
2014-09-22 17:28     ` Michal Hocko
2014-09-22 17:28       ` Michal Hocko
2014-09-22 19:58       ` Johannes Weiner
2014-09-22 19:58         ` Johannes Weiner
     [not found]         ` <20140922195829.GA5197-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2014-09-23 13:25           ` Michal Hocko
2014-09-23 13:25             ` Michal Hocko
2014-09-23 13:25             ` Michal Hocko
2014-09-23 14:05             ` Johannes Weiner
2014-09-23 14:05               ` Johannes Weiner
     [not found]               ` <20140923140526.GA15014-druUgvl0LCNAfugRpC6u6w@public.gmane.org>
2014-09-23 14:28                 ` Michal Hocko
2014-09-23 14:28                   ` Michal Hocko
2014-09-23 14:28                   ` Michal Hocko
2014-09-23 22:33                   ` David Rientjes
2014-09-23 22:33                     ` David Rientjes
2014-09-23  7:46 ` Kamezawa Hiroyuki
2014-09-23  7:46   ` Kamezawa Hiroyuki

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