From: Lutz Vieweg <lvml@5t9.de>
To: Michal Hocko <mhocko@suse.cz>
Cc: Hiroyuki Kamezawa <kamezawa.hiroyuki@gmail.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Christoph Hellwig <hch@infradead.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>, Rik van Riel <riel@redhat.com>,
Michel Lespinasse <walken@google.com>,
Mel Gorman <mgorman@suse.de>
Subject: Re: [PATCH] mm: preallocate page before lock_page at filemap COW. (WasRe: [PATCH V2] mm: Do not keep page locked during page fault while charging it for memcg
Date: Thu, 26 Jan 2012 11:46:33 +0100 [thread overview]
Message-ID: <4F212F09.4090802@5t9.de> (raw)
In-Reply-To: <20110712094841.GC10552@tiehlicka.suse.cz>
On 07/12/2011 11:48 AM, Michal Hocko wrote:
> Is there any intereset in discussing this or the email just got lost?
> Just for reference preallocation patch from Kamezawa is already in the
> Andrew's tree.
It's been a long time since this discussion, I just wanted to add
that I've been recently able to confirm the ability of memcg
to prevent single users from DOSing a system by "make -j" - in
a real-world scenario (using linux-3.2.1).
So thanks to all who contributed to the solution in whatever way :-)
(A minor issue remained: The kernel is very verbose when
killing tasks due to memcg restrictions. In fork-bomb like
scenarios, this can lead to high resource utilization for
syslog et al.)
Regards,
Lutz Vieweg
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WARNING: multiple messages have this Message-ID (diff)
From: Lutz Vieweg <lvml@5t9.de>
To: Michal Hocko <mhocko@suse.cz>
Cc: Hiroyuki Kamezawa <kamezawa.hiroyuki@gmail.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Christoph Hellwig <hch@infradead.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Hugh Dickins <hughd@google.com>, Rik van Riel <riel@redhat.com>,
Michel Lespinasse <walken@google.com>,
Mel Gorman <mgorman@suse.de>
Subject: Re: [PATCH] mm: preallocate page before lock_page at filemap COW. (WasRe: [PATCH V2] mm: Do not keep page locked during page fault while charging it for memcg
Date: Thu, 26 Jan 2012 11:46:33 +0100 [thread overview]
Message-ID: <4F212F09.4090802@5t9.de> (raw)
In-Reply-To: <20110712094841.GC10552@tiehlicka.suse.cz>
On 07/12/2011 11:48 AM, Michal Hocko wrote:
> Is there any intereset in discussing this or the email just got lost?
> Just for reference preallocation patch from Kamezawa is already in the
> Andrew's tree.
It's been a long time since this discussion, I just wanted to add
that I've been recently able to confirm the ability of memcg
to prevent single users from DOSing a system by "make -j" - in
a real-world scenario (using linux-3.2.1).
So thanks to all who contributed to the solution in whatever way :-)
(A minor issue remained: The kernel is very verbose when
killing tasks due to memcg restrictions. In fork-bomb like
scenarios, this can lead to high resource utilization for
syslog et al.)
Regards,
Lutz Vieweg
next prev parent reply other threads:[~2012-01-26 10:46 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-22 12:06 [PATCH] mm: Do not keep page locked during page fault while charging it for memcg Michal Hocko
2011-06-22 12:06 ` Michal Hocko
2011-06-22 12:15 ` Christoph Hellwig
2011-06-22 12:15 ` Christoph Hellwig
2011-06-22 12:32 ` [PATCH V2] " Michal Hocko
2011-06-22 12:32 ` Michal Hocko
2011-06-23 6:08 ` [PATCH] memcg: unlock page before charging it. (WasRe: " KAMEZAWA Hiroyuki
2011-06-23 6:08 ` KAMEZAWA Hiroyuki
2011-06-23 7:23 ` Daisuke Nishimura
2011-06-23 7:23 ` Daisuke Nishimura
2011-06-23 7:41 ` Michal Hocko
2011-06-23 7:41 ` Michal Hocko
2011-06-23 8:08 ` KAMEZAWA Hiroyuki
2011-06-23 8:08 ` KAMEZAWA Hiroyuki
2011-06-23 9:02 ` Michal Hocko
2011-06-23 9:02 ` Michal Hocko
2011-06-23 10:01 ` [PATCH] mm: preallocate page before lock_page at filemap COW. " KAMEZAWA Hiroyuki
2011-06-23 10:01 ` KAMEZAWA Hiroyuki
2011-06-23 11:58 ` Michal Hocko
2011-06-23 11:58 ` Michal Hocko
2011-06-23 13:01 ` Hiroyuki Kamezawa
2011-06-23 13:01 ` Hiroyuki Kamezawa
2011-06-23 13:23 ` Michal Hocko
2011-06-23 13:23 ` Michal Hocko
2011-06-23 13:51 ` Hiroyuki Kamezawa
2011-06-23 13:51 ` Hiroyuki Kamezawa
2011-06-24 7:57 ` Michal Hocko
2011-06-24 7:57 ` Michal Hocko
2011-06-24 11:46 ` Hiroyuki Kamezawa
2011-06-24 11:46 ` Hiroyuki Kamezawa
2011-07-12 9:48 ` Michal Hocko
2011-07-12 9:48 ` Michal Hocko
2012-01-26 10:46 ` Lutz Vieweg [this message]
2012-01-26 10:46 ` Lutz Vieweg
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