linux-kernel - Re: [2.6.17.4] slabinfo.buffer

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Message-ID: <45061FCB.1000402@yahoo.com.au>
Date:	Tue, 12 Sep 2006 12:47:39 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Guennadi Liakhovetski <gl@...-ac.de>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [2.6.17.4] slabinfo.buffer_head increases

Guennadi Liakhovetski wrote:

>> On Mon, 10 Jul 2006, Guennadi Liakhovetski wrote:
>>
>>> I am obsering a steadily increasing buffer_head value in slabinfo under
>>> 2.6.17.4. I searched the net / archives and didn't find anything
>>> directly relevant. Does anyone have an idea or how shall we debug it?
>>
>
> The problem is still there under 2.6.18-rc2. I narrowed it down to 
> ext3 journal. To reproduce one just has to mount an ext3 partition and 
> perform (write) accesses to it. A loop { touch /mnt/foo; sleep 1; } 
> suffices - just let it run for a couple of minutes and monitor 
> buffer_head in /proc/slabinfo. If you mount it as ext2 the problem is 
> gone.


What data mode is ext3 mounted with?

Is the memory reclaimable? If yes, is it a problem?

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