Messages in this thread | | | Subject | Re: [PATCH 3/3] nfs: use ->mmap_prepare() to avoid an AB-BA deadlock | From | Trond Myklebust <> | Date | Wed, 14 Nov 2007 17:53:48 -0500 |
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On Wed, 2007-11-14 at 23:24 +0100, Nick Piggin wrote:
> mmap()s can be different from read in that the syscall may have little > relation to when the data gets used. But I guess it's still a best > effort thing. Fair enough.
Agreed that mmap() is special and very problematic on NFS. However I can't see how we can improve on the existing models short of some significant protocol modifications, and so far, nobody has presented the IETF with a good case for why they need this level of cache consistency.
Cheers Trond
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