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RE: XFS memory allocation deadlock in 2.6.38

To: "'Dave Chinner'" <david@xxxxxxxxxxxxx>
Subject: RE: XFS memory allocation deadlock in 2.6.38
From: Sean Noonan <Sean.Noonan@xxxxxxxxxxxx>
Date: Wed, 23 Mar 2011 18:33:04 -0400
Accept-language: en-US
Acceptlanguage: en-US
Cc: "'linux-xfs@xxxxxxxxxxx'" <linux-xfs@xxxxxxxxxxx>, Martin Bligh <Martin.Bligh@xxxxxxxxxxxx>, Trammell Hudson <Trammell.Hudson@xxxxxxxxxxxx>
In-reply-to: <20110323220345.GD26611@dastard>
References: <081DDE43F61F3D43929A181B477DCA95639B52E8@xxxxxxxxxxxxxxxxxxxx> <20110322232504.GC15270@dastard> <081DDE43F61F3D43929A181B477DCA95639B532C@xxxxxxxxxxxxxxxxxxxx> <20110323220345.GD26611@dastard>
Thread-index: Acvppjh5mjFB+Va2T1GGTvpxjvayHgAA9vnQ
Thread-topic: XFS memory allocation deadlock in 2.6.38
> So why would creating a 16GB file cause and OOM condition if you
> have 48GB RAM? That doesn't make a whole lot of sense to me. Is
> that memory free, of are other things running and consuming memory?

As far as I know this isn't an OOM condition.  It is a bug, which is why I sent 
a patch that fixes this specific case earlier today.

Sean

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