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Date: Wed, 27 Jan 2010 15:46:15 -0800 (PST) From: David Rientjes <rientjes@...gle.com> To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> cc: Andrew Morton <akpm@...ux-foundation.org>, Balbir Singh <balbir@...ux.vnet.ibm.com>, minchan.kim@...il.com, linux-kernel@...r.kernel.org, linux-mm@...ck.org Subject: Re: [PATCH v3] oom-kill: add lowmem usage aware oom kill handling On Wed, 27 Jan 2010, KAMEZAWA Hiroyuki wrote: > Yes, I think you're right. But "breaking current behaviro of our servers!" > arguments kills all proposal to this area and this oom-killer or vmscan is > a feature should be tested by real users. Nobody has said we should discount lowmem rss when dealing with a GFP_DMA allocation, it simply wasn't possible until the lowmem rss counters were introduced in -mm. It would prevent the needless killing of innocent tasks which would not allow the page allocation to succeed, so it's a good feature to have. It doesn't need to be configurable at all, we just need to find a way to introduce it into the heuristic without mangling oom_adj. -- 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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