Re: btrfs filesystem "hang" after page allocation failure: order:0 + kernel BUG at fs/btrfs/extent_io.c:4151

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On Thu, Aug 08, 2013 at 02:17:05AM +0800, Tomasz Chmielewski wrote:
> One of btrfs filesystems hanged on my server.
> 
> By "hang", I mean it's not possible to finish any write operation, i.e.:
> 
> # cd /mnt/btrfs
> 
> # ls
> some-file
> 
> # touch 1
> [it never returns to shell here]
> 

I've just posted a patch to get rid of the panic on oom, could you please apply
it and verify you no longer see the panic?  The OOM is another issue, but we
should at the very least not panic.  Thanks,

Josef
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