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Date: Wed, 4 Feb 2009 03:30:37 -0500
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: reproducible xfs/vmap oops
Message-ID: <20090204083037.GA17493@infradead.org>
References: <20090201081224.GA22398@infradead.org>
	<20090203214711.GA24837@infradead.org>
	<20090203220808.GA9195@infradead.org>
	<200902041648.55603.nickpiggin@yahoo.com.au>
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To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Christoph Hellwig <hch@infradead.org>, xfs@oss.sgi.com

On Wed, Feb 04, 2009 at 03:15:47AM -0500, Christoph Hellwig wrote:
> On Wed, Feb 04, 2009 at 04:48:55PM +1100, Nick Piggin wrote:
> > OK, I could reproduce this directly with a vmap test. With this patch,
> > I'm no longer able to. (not sure how this mail client goes with attaching
> > patches, sorry if it messes up)
> 
> With that patch applies I run into a different issue:

And later on we run out of vmalloc space a lot getting warnings like
this:

[ 5796.986579] vmap allocation for size 4194304 failed: use
vmalloc=<size> to increase size.
[ 5797.008728] xfs_buf_get_noaddr: failed to map pages


This didn't happen before.  Maybe it's a result of some of the more
lazy TLB flushing?

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