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Date: Wed, 20 Oct 2010 11:32:38 +0900 (JST) From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> To: "Figo.zhang" <zhangtianfei@...dcoretech.com> Cc: kosaki.motohiro@...fujitsu.com, Wu Fengguang <fengguang.wu@...el.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, Minchan Kim <minchan.kim@...il.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "rientjes@...gle.com" <rientjes@...gle.com>, figo1802 <figo1802@...il.com>, "linux-mm@...ck.org" <linux-mm@...ck.org> Subject: Re: oom_killer crash linux system > > > > page_add_file_rmap() just counts an event where mapcount goes 0->1. > > > Even if thousands process shares a page, it's just counted into file_mapped as 1. > > > > > > Then, there are 480MB of mapped file caches. Do I miss something ? > > > > > > Anyway, sum-of-all-lru-of-highmem is 480MB smaller than present pages. > > > and isolated(anon/file) is 0kB. > > > (NORMAL has similar problem) > > > > hugetlb files? But it's a desktop box. Figo, what's your meminfo? > > > > The GEM objects may be files not in LRU, however they should be > > accounted into shmem. > > > > Figo, would you run "page-types -r" for some clues? It can be compiled > > from the kernel tree: > > > > cd linux > > make Documentation/vm > > sudo Documentation/vm/page-types -r > > hi fengguang, > here is the "page-types -r" result: > > flags page-count MB symbolic-flags > long-symbolic-flags > 0x0000000000005828 74342 290 ___U_l_____Ma_b___________________ uptodate,lru,mmap,anonymous,swapbacked > 0x0000000000005868 373077 1457 ___U_lA____Ma_b___________________ uptodate,lru,active,mmap,anonymous,swapbacked 1457+290=1747MB. that's ok. and this is very different result with your previous oom log. can you please try 1) invoke oom 2) get page-types -r again. I'm curious that oom makes page accounting lost again. I mean, please send us oom log and "page-types -r" result. thanks. -- 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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