linux-kernel - Re: [PATCH] mm: clear pages_scanned only if draining a pcp adds pages to the buddy allocator again

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Message-Id: <20120622131901.28f273e3.akpm@linux-foundation.org>
Date:	Fri, 22 Jun 2012 13:19:01 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	kosaki.motohiro@...il.com
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	David Rientjes <rientjes@...gle.com>,
	Mel Gorman <mel@....ul.ie>,
	Johannes Weiner <hannes@...xchg.org>,
	Minchan Kim <minchan.kim@...il.com>,
	Wu Fengguang <fengguang.wu@...el.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Rik van Riel <riel@...hat.com>
Subject: Re: [PATCH] mm: clear pages_scanned only if draining a pcp adds
 pages to the buddy allocator again

On Thu, 14 Jun 2012 12:16:10 -0400
kosaki.motohiro@...il.com wrote:

> commit 2ff754fa8f (mm: clear pages_scanned only if draining a pcp adds pages
> to the buddy allocator again) fixed one free_pcppages_bulk() misuse. But two
> another miuse still exist.

This changelog is irritating.  One can understand it a bit if one
happens to have a git repo handy (and why do this to the reader?), but
the changelog for 2ff754fa8f indicates that the patch might fix a
livelock.  Is that true of this patch?  Who knows...
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