From: Li Zefan <lizf@cn.fujitsu.com>
To: David Rientjes <rientjes@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>,
Andrew Morton <akpm@linux-foundation.org>,
Paul Menage <menage@google.com>,
bblum@andrew.cmu.edu, linux-kernel@vger.kernel.org,
containers@lists.linux-foundation.org,
Dave Hansen <haveblue@us.ibm.com>
Subject: Re: [PATCH 4/8] Use vmalloc for large cgroups pidlist allocations
Date: Fri, 21 Aug 2009 08:53:01 +0800 [thread overview]
Message-ID: <4A8DEFED.5090408@cn.fujitsu.com> (raw)
In-Reply-To: <alpine.DEB.2.00.0908201542440.29906@chino.kir.corp.google.com>
David Rientjes wrote:
> On Thu, 20 Aug 2009, Jonathan Corbet wrote:
>
>> On Thu, 20 Aug 2009 14:14:00 -0700
>> Andrew Morton <akpm@linux-foundation.org> wrote:
>>
>>> Hang on. Isn't this why Dave just wrote and I just rush-merged
>>> lib/flex_array.c?
>>>
>>> Was that code evaluated for this application and judged unsuitable? If so,
>>> for what reason?
>> Should it be helpful: I wrote an overview of the flex_array API here:
>>
>> http://lwn.net/Articles/345273/
>>
>> I could format it up for addition to Documentation/ if people want.
>>
>
> It's definitely helpful for this use case, flex array can store 261,632
> pid_t's on 64 bit.
>
flex_array surely can be used here, or implement Paul's proposal:
http://lkml.org/lkml/2009/7/15/226
Note both solutions will probably make the output pid list unsorted.
Or maybe we can implement flex_array_sort().
next prev parent reply other threads:[~2009-08-21 0:54 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-18 23:58 [PATCH 0/8] CGroups: cgroup memberlist enhancements/fixes Paul Menage
2009-08-18 23:58 ` [PATCH 1/8] Revert commit 8827c288feb7810185aa7c2e37537202fc709869 Paul Menage
2009-08-20 2:34 ` Li Zefan
2009-08-20 2:41 ` Paul Menage
2009-08-20 3:11 ` Li Zefan
2009-08-20 3:13 ` Paul Menage
2009-08-20 3:17 ` Li Zefan
2009-08-20 4:40 ` Matt Helsley
2009-08-20 4:49 ` Paul Menage
2009-08-20 21:13 ` Andrew Morton
2009-08-18 23:58 ` [PATCH 2/8] Adds a read-only "procs" file similar to "tasks" that shows only unique tgids Paul Menage
2009-08-20 2:34 ` Li Zefan
2009-08-18 23:58 ` [PATCH 3/8] Ensures correct concurrent opening/reading of pidlists across pid namespaces Paul Menage
2009-08-18 23:58 ` [PATCH 4/8] Use vmalloc for large cgroups pidlist allocations Paul Menage
2009-08-20 2:37 ` Li Zefan
2009-08-20 2:41 ` Paul Menage
2009-08-20 2:54 ` Li Zefan
2009-08-20 3:04 ` Paul Menage
2009-08-20 21:14 ` Andrew Morton
2009-08-20 22:35 ` Jonathan Corbet
2009-08-20 22:56 ` David Rientjes
2009-08-21 0:53 ` Li Zefan [this message]
2009-08-18 23:58 ` [PATCH 5/8] Changes css_set freeing mechanism to be under RCU Paul Menage
2009-08-20 2:38 ` Li Zefan
2009-08-18 23:58 ` [PATCH 6/8] Lets ss->can_attach and ss->attach do whole threadgroups at a time Paul Menage
2009-08-20 3:06 ` Li Zefan
2009-08-20 4:38 ` Matt Helsley
2009-08-18 23:58 ` [PATCH 7/8] Adds functionality to read/write lock CLONE_THREAD fork()ing per-threadgroup Paul Menage
2009-08-20 2:39 ` Li Zefan
2009-08-20 2:45 ` Paul Menage
2009-08-20 21:13 ` Andrew Morton
2009-08-20 21:16 ` Paul Menage
2009-08-21 4:24 ` Ben Blum
2009-08-21 4:50 ` Andrew Morton
2009-08-21 4:58 ` Paul Menage
2009-08-18 23:58 ` [PATCH 8/8] Adds ability to move all threads in a process to a new cgroup atomically Paul Menage
2009-08-20 3:00 ` Li Zefan
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