From: Dave Hansen <dave@linux.vnet.ibm.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
lnxninja@linux.vnet.ibm.com
Subject: Re: [RFC][PATCH] update /proc/sys/vm/drop_caches documentation
Date: Wed, 15 Sep 2010 12:27:01 -0700 [thread overview]
Message-ID: <1284578821.27089.17409.camel@nimitz> (raw)
In-Reply-To: <m1d3se7t0h.fsf@fess.ebiederm.org>
On Wed, 2010-09-15 at 11:37 -0700, Eric W. Biederman wrote:
> > I'm worried that there are users out there experiencing real problems
> > that aren't reporting it because "workarounds" like this just paper over
> > the issue.
>
> For what it is worth. I had a friend ask me about a system that had 50%
> of it's memory consumed by slab caches. 20GB out of 40GB. The kernel
> was suse? 2.6.27 so it's old, but if you are curious.
> /proc/sys/vm/drop_caches does nothing in that case.
Was it the reclaimable caches doing it, though? The other really common
cause is kmalloc() leaks.
-- Dave
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next prev parent reply other threads:[~2010-09-15 19:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-14 23:47 Dave Hansen
2010-09-15 4:33 ` KAMEZAWA Hiroyuki
2010-09-15 4:53 ` KOSAKI Motohiro
2010-09-15 6:14 ` Dave Hansen
2010-09-15 18:37 ` Eric W. Biederman
2010-09-15 19:27 ` Dave Hansen [this message]
2010-09-15 21:34 ` Eric W. Biederman
2010-09-15 19:24 ` Tim Pepper
2010-09-16 0:12 ` KAMEZAWA Hiroyuki
2010-09-16 1:21 ` Dave Hansen
2010-09-16 1:33 ` KAMEZAWA Hiroyuki
2010-09-24 13:02 ` Pavel Machek
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