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Re: [PATCH] xfs: flush vmap aliases when mapping fails

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: [PATCH] xfs: flush vmap aliases when mapping fails
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Thu, 17 Mar 2011 10:24:18 -0400
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, linux-mm@xxxxxxxxx, npiggin@xxxxxxxxx, xfs@xxxxxxxxxxx
In-reply-to: <20110310224945.GA15097@dastard>
References: <1299713876-7747-1-git-send-email-david@xxxxxxxxxxxxx> <20110310073751.GB25374@xxxxxxxxxxxxx> <20110310224945.GA15097@dastard>
User-agent: Mutt/1.5.21 (2010-09-15)
On Fri, Mar 11, 2011 at 09:49:45AM +1100, Dave Chinner wrote:
> > IMHO this should be done by vm_map_ram internally.  If we can't get the
> > core code fixes we can put this in as a last resort.
> 
> OK. The patch was done as part of the triage for this bug:
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=27492
> 
> where the vmalloc space on 32 bit systems is getting exhausted. I
> can easily move this flush-and-retry into the vmap code.

Looks like we're not going to make any progress on the VM side for this,
so I think we'll need the XFS variant for 2.6.39.


Reviewed-by: Christoph Hellwig <hch@xxxxxx>

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