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Date: Thu, 16 Jul 2009 13:35:07 +0900 (JST) From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: kosaki.motohiro@...fujitsu.com, LKML <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org>, Wu Fengguang <fengguang.wu@...el.com>, Rik van Riel <riel@...hat.com>, Minchan Kim <minchan.kim@...il.com>, Christoph Lameter <cl@...ux-foundation.org> Subject: Re: [PATCH 3/3] add isolate pages vmstat > > reproduce way > > ----------------------- > > % ./hackbench 140 process 1000 > > => OOM occur > > > > active_anon:146 inactive_anon:0 isolated_anon:49245 > > active_file:79 inactive_file:18 isolated_file:113 > > unevictable:0 dirty:0 writeback:0 unstable:0 buffer:39 > > free:370 slab_reclaimable:309 slab_unreclaimable:5492 > > mapped:53 shmem:15 pagetables:28140 bounce:0 > > > > @@ -1164,6 +1170,9 @@ static unsigned long shrink_inactive_lis > > spin_lock_irq(&zone->lru_lock); > > } > > } > > + __mod_zone_page_state(zone, NR_ISOLATED_ANON, -nr_anon); > > + __mod_zone_page_state(zone, NR_ISOLATED_FILE, -nr_file); > > + > > } while (nr_scanned < max_scan); > > This is a non-trivial amount of extra stuff. Do we really need it? In general, Administrator really hate large amount unaccounted memory. Recent msgctl11 discussion, We faced it isolate pages about 1/3 system memory. Ahtough Rik's patch is applied, vmscan can isolate >1GB memory. That's my point. -- 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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