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

[Mel Gorman]

On Fri, Jan 11, 2013 at 12:51:05AM +0000, Eric Wong wrote:
> Mel Gorman <mgorman@xxxxxxx> wrote:
> > mm: compaction: Partially revert capture of suitable high-order page
> 
> <snip>
>  
> > Reported-by: Eric Wong <normalperson@xxxxxxxx>
> > Cc: stable@xxxxxxxxxxxxxxx
> > Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
> 
> Thanks, my original use case and test works great after several hours!
> 
> Tested-by: Eric Wong <normalperson@xxxxxxxx>
> 

Thanks very much Eric. I've resent the patch to Andrew so it should make
its way to mainline. It'll fail to apply to 3.7-stable but I should get
a notification from Greg when that happens and fix it up.

> Unfortunately, I also hit a new bug in 3.8 (not in 3.7.x).  based on Eric
> Dumazet's observations, sk_stream_wait_memory may be to blame.
> Fortunately this is easier to reproduce (I've cc-ed participants
> on this thread already): <20130111004915.GA15415@xxxxxxxxxxxxx>

It looks like the relevant fix for this has already been written by Eric
Dumazet and picked up by David Miller.

-- 
Mel Gorman
SUSE Labs
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