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Message-Id: <201301250147.r0P1l00t001070@como.maths.usyd.edu.au> Date: Fri, 25 Jan 2013 12:47:00 +1100 From: paul.szabo@...ney.edu.au To: fengguang.wu@...el.com Cc: 695182@...s.debian.org, akpm@...ux-foundation.org, jack@...e.cz, linux-kernel@...r.kernel.org, linux-mm@...ck.org Subject: Re: [PATCH] Negative (setpoint-dirty) in bdi_position_ratio() 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@...hs.usyd.edu.au http://www.maths.usyd.edu.au/u/psz/ School of Mathematics and Statistics University of Sydney Australia -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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