From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: balbir@linux.vnet.ibm.com
Cc: Bharata B Rao <bharata@linux.vnet.ibm.com>,
Li Zefan <lizf@cn.fujitsu.com>,
linux-kernel@vger.kernel.org,
Dhaval Giani <dhaval@linux.vnet.ibm.com>,
Paul Menage <menage@google.com>, Ingo Molnar <mingo@elte.hu>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [PATCH -tip] cpuacct: Make cpuacct hierarchy walk in cpuacct_charge() safe when rcupreempt is used.
Date: Tue, 17 Mar 2009 14:26:01 +0100 [thread overview]
Message-ID: <1237296361.7867.16.camel@twins> (raw)
In-Reply-To: <20090317131251.GU16897@balbir.in.ibm.com>
On Tue, 2009-03-17 at 18:42 +0530, Balbir Singh wrote:
> I'd like to get the patches in -tip and see the results, I would
> recommend using percpu_counter_sum() while reading the data as an
> enhancement to this patch. If user space does not overwhelm with a lot
> of reads, sum would work out better.
You trust userspace? I'd rather not.
next prev parent reply other threads:[~2009-03-17 13:26 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-17 6:17 [PATCH -tip] cpuacct: Make cpuacct hierarchy walk in cpuacct_charge() safe when rcupreempt is used Bharata B Rao
2009-03-17 6:28 ` Li Zefan
2009-03-17 7:36 ` Bharata B Rao
2009-03-17 13:12 ` Balbir Singh
2009-03-17 13:26 ` Peter Zijlstra [this message]
2009-03-17 13:59 ` Balbir Singh
2009-03-17 14:04 ` Peter Zijlstra
2009-03-18 3:25 ` Bharata B Rao
2009-03-18 3:54 ` KAMEZAWA Hiroyuki
2009-03-18 4:48 ` Bharata B Rao
2009-03-18 7:08 ` KAMEZAWA Hiroyuki
2009-03-18 8:05 ` Bharata B Rao
2009-03-17 23:59 ` KAMEZAWA Hiroyuki
2009-03-18 3:18 ` Bharata B Rao
2009-03-18 9:36 ` Balbir Singh
2009-03-19 9:20 ` Peter Zijlstra
2009-03-19 9:43 ` Bharata B Rao
2009-03-17 12:40 ` Balbir Singh
2009-03-18 1:40 ` Li Zefan
2009-03-18 2:59 ` Balbir Singh
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