linux-kernel - Re: ppoll() stuck on POLLIN while TCP peer is sending

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Message-ID: <20130102204712.GA17806@dcvr.yhbt.net>
Date:	Wed, 2 Jan 2013 20:47:12 +0000
From:	Eric Wong <normalperson@...t.net>
To:	Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Rik van Riel <riel@...hat.com>,
	Minchan Kim <minchan@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: ppoll() stuck on POLLIN while TCP peer is sending

Eric Wong <normalperson@...t.net> wrote:
> [1] my full setup is very strange.
> 
>     Other than the FUSE component I forgot to mention, little depends on
>     the kernel.  With all this, the standalone toosleepy can get stuck.
>     I'll try to reproduce it with less...

I just confirmed my toosleepy processes will get stuck while just
doing "rsync -a" between local disks.  So this does not depend on
sendfile or FUSE to reproduce.
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