Re: [patch] mm: close page_mkwrite races (try 3)

[Trond Myklebust <trond.myklebust@fys.uio.no>]

On Wed, 2009-04-29 at 09:45 +0200, Nick Piggin wrote:
> On Wed, Apr 29, 2009 at 12:24:18AM -0700, Andrew Morton wrote:
> > On Wed, 29 Apr 2009 09:12:33 +0200 Nick Piggin <npiggin@suse.de> wrote:
> > 
> > > I haven't got any prepared, but they should be a pretty trivial
> > > backport, provided we also backport c2ec175c39f62949438354f603f4aa170846aabb
> > > (which is probably a good idea anyway).
> > > 
> > > However I will probably wait for a bit, given that the patch isn't upstream
> > > yet.
> > 
> > err, I'd marked it as for-2.6.31.  It looks like that was wrong?
> 
> At the time I agreed because I didn't know the severity of the NFS
> bugs. So it is up to you and Trond / nfs guys I guess.
> 

The bug affects any serious use of shared mmap writes, so it's pretty
urgent to get it merged together with the NFS 3 liner. As I said in an
earlier email, I'm able to reproduce it at will within 1 minute or so of
using iozone with the right options.

I also concur with the opinion that we should backport it to the stable
kernels as soon as possible.

Cheers
  Trond

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