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Re: 3.5+, xfs and 32bit armhf - xfs_buf_get: failed to map pages

To: Dave Chinner <david@xxxxxxxxxxxxx>
Subject: Re: 3.5+, xfs and 32bit armhf - xfs_buf_get: failed to map pages
From: Paolo Pisati <p.pisati@xxxxxxxxx>
Date: Wed, 29 May 2013 15:56:41 +0200
Cc: Paolo Pisati <p.pisati@xxxxxxxxx>, xfs@xxxxxxxxxxx
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On Thu, May 23, 2013 at 04:34:56PM +0200, Paolo Pisati wrote:
> On Tue, May 21, 2013 at 10:02:09AM +1000, Dave Chinner wrote:
> > 
> > And that fix I mentioned will be useless if you don't apply the
> > patch that avoids the vmap allocation problem....
> ok, so i recompiled a kernel+aforementioend fix, i repartitioned my disk and i
> ran the swift-bench for 2 days in a row until i got this:

i'm testing a 3.5.y kernel plus those 3 patches:

549142a xfs: don't use speculative prealloc for small files
f0843f4 xfs: limit speculative prealloc size on sparse files
454da09 xfs: inode allocation should use unmapped buffers.

and i can confirm that:

-using a small fs (2G) i cannot reproduce any -ENOSPC or vmalloc() problem
anymore, the benchmark runs until running out of inodes 

-using a bigger fs (~250G), two days and my tests are still running good


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