From: Wu Fengguang <fengguang.wu@intel.com>
To: Lukas Hejtmanek <xhejtman@ics.muni.cz>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Bill Davidsen <davidsen@tmr.com>
Subject: Re: 2.6.28-rc8 big regression in VM
Date: Wed, 17 Dec 2008 21:02:18 +0800 [thread overview]
Message-ID: <20081217130218.GA22620@localhost> (raw)
In-Reply-To: <20081217124904.GG4480@ics.muni.cz>
On Wed, Dec 17, 2008 at 02:49:04PM +0200, Lukas Hejtmanek wrote:
> On Wed, Dec 17, 2008 at 08:44:21PM +0800, Wu Fengguang wrote:
> > So the cache memory shrinks a lot.
> >
> > Maybe your 'free' command is reporting wrong numbers?
> > Or it's not a quite reproducible problem?
>
> it depends, I think that 100MB of caches which is not dropped is not quite OK.
>
> While using the system without reboots for a long time, 'undroppable' amount
> of caches rises until the system is unusable.
The mapped file pages are not easily dropped:
Mapped: 73380 kB => 73384 kB
You can check this number when the system becomes somehow unusable. The
/proc/filecache interface can also help you identify which files/pages
tend to stick in memory.
Thanks,
Fengguang
next prev parent reply other threads:[~2008-12-17 13:03 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-12 18:38 2.6.28-rc8 big regression in VM Lukas Hejtmanek
2008-12-13 1:21 ` Wu Fengguang
2008-12-13 9:58 ` Lukas Hejtmanek
2008-12-13 14:02 ` Wu Fengguang
2008-12-16 21:08 ` Bill Davidsen
2008-12-15 1:16 ` Wu Fengguang
2008-12-15 2:05 ` KOSAKI Motohiro
2008-12-15 9:53 ` Lukas Hejtmanek
2008-12-15 10:56 ` KOSAKI Motohiro
2008-12-15 9:44 ` Lukas Hejtmanek
2008-12-16 4:59 ` Wu Fengguang
[not found] ` <20081216195219.GA4480@ics.muni.cz>
2008-12-17 12:27 ` Wu Fengguang
2008-12-17 12:33 ` Lukas Hejtmanek
2008-12-17 12:44 ` Wu Fengguang
2008-12-17 12:49 ` Lukas Hejtmanek
2008-12-17 13:02 ` Wu Fengguang [this message]
2008-12-25 10:50 ` Wu Fengguang
2008-12-25 10:58 ` Lukas Hejtmanek
2008-12-25 11:18 ` Wu Fengguang
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