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Re: deadlocks with fallocate

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: deadlocks with fallocate
From: Thomas Neumann <tneumann@xxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 15 Oct 2009 01:16:27 +0200
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <20091014150951.GA13123@xxxxxxxxxxxxx>
References: <hak2l2$ko2$1@xxxxxxxxxxxxx> <20091014150951.GA13123@xxxxxxxxxxxxx>
User-agent: KMail/1.12.2 (Linux/2.6.31-14-generic; KDE/4.3.2; x86_64; ; )
> And this thread is inside the fallocate handler.
> 
> Can you try if the hack below makes the problem go away?
> 
> +     current->flags |= PF_FSTRANS;

that seems to do the trick. I will test it some more, but so far it has 
already survived a workload that usually triggered the deadlock quite 
reliably.

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