linux-kernel - Re: WARNING: at mm/page-writeback.c:1990 __set_page_dirty

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Message-ID: <alpine.LSU.2.00.1206020021280.1376@eggly.anvils>
Date:	Sat, 2 Jun 2012 00:22:34 -0700 (PDT)
From:	Hugh Dickins <hughd@...gle.com>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Mel Gorman <mgorman@...e.de>, Minchan Kim <minchan@...nel.org>,
	Rik van Riel <riel@...hat.com>,
	Dave Jones <davej@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Cong Wang <amwang@...hat.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org
Subject: Re: WARNING: at mm/page-writeback.c:1990
 __set_page_dirty_nobuffers+0x13a/0x170()

On Sat, 2 Jun 2012, Markus Trippelsdorf wrote:
> On 2012.06.01 at 21:40 -0700, Hugh Dickins wrote:
> > 
> > I'm guessing that the few people who see the warning are those running
> > new systemd distros, and that systemd is indeed now making use of the
> > fallocate support we added into tmpfs for it.)
> 
> At least in my case it's nothing that horrible. I'm just setting
> browser.cache.disk.parent_directory to /dev/shm in Firefox. And Firefox
> does indeed use fallocate on its "disk cache" items.

That fits, and it's very helpful to know - thank you.

Hugh
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