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Date: Wed, 20 Oct 2010 13:14:27 +0900 From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> Cc: Greg Thelen <gthelen@...gle.com>, Andrew Morton <akpm@...ux-foundation.org>, linux-kernel@...r.kernel.org, linux-mm@...ck.org, containers@...ts.osdl.org, Andrea Righi <arighi@...eler.com>, Balbir Singh <balbir@...ux.vnet.ibm.com>, Daisuke Nishimura <nishimura@....nes.nec.co.jp>, Minchan Kim <minchan.kim@...il.com>, Ciju Rajan K <ciju@...ux.vnet.ibm.com>, David Rientjes <rientjes@...gle.com> Subject: Re: [PATCH][memcg+dirtylimit] Fix overwriting global vm dirty limit setting by memcg (Re: [PATCH v3 00/11] memcg: per cgroup dirty page accounting On Wed, 20 Oct 2010 12:21:44 +0900 KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote: > > One bug fix here. > == > From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> > > Now, at calculating dirty limit, vm_dirty_param() is called. > This function returns dirty-limit related parameters considering > memory cgroup settings. > > Now, assume that vm_dirty_bytes=100M (global dirty limit) and > memory cgroup has 1G of pages and 40 dirty_ratio, dirtyable memory is > 500MB. > > In this case, global_dirty_limits will consider dirty_limt as > 500 *0.4 = 200MB. This is bad...memory cgroup is not back door. > > This patch limits the return value of vm_dirty_param() considring > global settings. > > Sorry, this one is buggy. I'll post a new one later. Thanks, -Kame -- 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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