From: paul.szabo@sydney.edu.au
To: fengguang.wu@intel.com
Cc: 695182@bugs.debian.org, akpm@linux-foundation.org, jack@suse.cz,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH] Negative (setpoint-dirty) in bdi_position_ratio()
Date: Fri, 25 Jan 2013 12:47:00 +1100 [thread overview]
Message-ID: <201301250147.r0P1l00t001070@como.maths.usyd.edu.au> (raw)
In-Reply-To: <20130125005529.GA21668@localhost>
Dear Fengguang,
> There are 260MB reclaimable slab pages in the normal zone ...
Marked "all_unreclaimable? yes": is that wrong? Question asked also in:
http://marc.info/?l=linux-mm&m=135873981326767&w=2
> ... however we somehow failed to reclaim them. ...
I made a patch that would do a drop_caches at that point, please see:
http://bugs.debian.org/695182
http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=101;filename=drop_caches.patch;att=1;bug=695182
http://marc.info/?l=linux-mm&m=135785511125549&w=2
and that successfully avoided OOM when writing files.
But, the drop_caches patch did not protect against the "sleep test".
> ... What's your filesystem and the content of /proc/slabinfo?
Filesystem is EXT3. See output of slabinfo in Debian bug above or in
http://marc.info/?l=linux-mm&m=135796154427544&w=2
Thanks, Paul
Paul Szabo psz@maths.usyd.edu.au http://www.maths.usyd.edu.au/u/psz/
School of Mathematics and Statistics University of Sydney Australia
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next prev parent reply other threads:[~2013-01-25 1:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-20 0:02 paul.szabo
2013-01-22 23:54 ` Jan Kara
2013-01-24 14:14 ` Fengguang Wu
2013-01-24 14:57 ` Fengguang Wu
2013-01-24 15:16 ` Jan Kara
2013-01-25 0:15 ` paul.szabo
2013-01-24 23:43 ` paul.szabo
2013-01-25 0:55 ` Fengguang Wu
2013-01-25 1:47 ` paul.szabo [this message]
2013-01-26 3:57 ` paul.szabo
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