Re: [PATCH 1/2] Btrfs: allocate extent state and check the result properly

From: Chris Mason
Date: Tue Apr 19 2011 - 07:58:16 EST


Excerpts from Xiao Guangrong's message of 2011-04-18 21:49:52 -0400:
> On 04/12/2011 04:14 PM, Xiao Guangrong wrote:
> > It doesn't allocate extent_state and check the result properly:
> > - in set_extent_bit, it doesn't allocate extent_state if the path is not
> > allowed wait
> >
> > - in clear_extent_bit, it doesn't check the result after atomic-ly allocate,
> > we trigger BUG_ON() if it's fail
> >
> > - if allocate fail, we trigger BUG_ON instead of returning -ENOMEM since
> > the return value of clear_extent_bit() is ignored by many callers
> >
>
> Ping...to see what happened. :-)

Sorry, could you please change this to check the results of the atomic
allocatoin in set/clear_extent_bit? I'd rather not add a new BUG_ON
deeper into the code.

-chris
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