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    SubjectRe: NFS regression in 2.6.37.1 (current stable)
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    On Thu, Mar 10, 2011 at 8:59 PM, Marc Kleine-Budde <mkl@pengutronix.de> wrote:
    > Hello Andrew,
    >
    > On 03/10/2011 07:53 PM, Dr Andrew John Hughes wrote:
    >> [Please CC me on responses as I'm not subscribed]
    >>
    >> Hi,
    >>
    >> I seem to have uncovered a regression in the NFS code between 2.6.37 and 2.6.37.1
    >> caused by this changeset:
    >>
    >> commit 55ea499d60aefa3d03a77fc8590c26b5881faa92
    >> Author: Trond Myklebust <Trond.Myklebust@netapp.com>
    >> Date:   Sat Jan 8 17:45:38 2011 -0500
    >> NFS: Don't use vm_map_ram() in readdir
    >> http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.37.y.git;a=commit;h=6650239a4b01077e80d5a4468562756d77afaa59
    >>
    >> With this change applied, copying of files between NFS and non-NFS
    >> mounts seems to be broken.  The easiest way I've found to replicate
    >> this myself is to use a VCS to do a clone of a tree on a NFS mount to
    >> a directory on a non-NFS mount.  I used Mercurial, as I had Mercurial
    >> trees to hand from work on IcedTea, but I assume doing it with a git
    >> tree such as the linux tree would also work.  The idea is to do
    >> something which involves copying over a bunch of directories and
    >> checking the result is readable.
    >>
    >> $ hg clone $HOME/projects/openjdk/icedtea6-hg
    >> destination directory: icedtea6-hg
    >> updating to branch default
    >> abort:
    >> data/contrib/templater/hotspot/src/cpu/CPU/vm/bytecodeInterpreter_CPU.inline.hpp.i@16d04ce16287:
    >> no match found!
    >>
    >> In the above, $HOME is an NFS mount and $PWD is a local reiserfs
    >> partition.  I initially hit failures doing builds with source on $HOME
    >> and the build directory on a local reiserfs partition.  In that
    >> scenario, it would fail as not being able to find files that should
    >> have been copied over.
    >>
    >> Reverting the changeset fixes the issue.  2.6.37.2 still has the bug.
    >> I haven't checked 2.6.37.3 yet but I didn't see any NFS changes in there.
    >
    > Which arch are you using? As this patch is also part of the upcoming
    > 2.6.38, can you check if the latest .38 is affected, too?

    Looking at the Gentoo bug report, I think Andrew is using x86-64:

    https://bugs.gentoo.org/show_bug.cgi?id=357121
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