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

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Message-ID: <20130104035254.GA17408@dcvr.yhbt.net>
Date:	Fri, 4 Jan 2013 03:52:54 +0000
From:	Eric Wong <normalperson@...t.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
	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:
> Eric Wong <normalperson@...t.net> wrote:
> > I think this requires frequent dirtying/cycling of pages to reproduce.
> > (from copying large files around) to interact with compaction.
> > I'll see if I can reproduce the issue with read-only FS activity.
> 
> Still successfully running the read-only test on my main machine, will
> provide another update in a few hours or so if it's still successful
> (it usually takes <1 hour to hit).

The read-only test is still going on my main machine.
I think writes/dirty data is required to reproduce the issue...
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