Re: [Bugme-new] [Bug 15709] New: swapper page allocation failure

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Apr 21, 2010 at 01:23:12PM +0200, kernel wrote:
> So after the compiler was running hot I've now the following result:
> 
> server10:/usr/src/linux # git bisect log 
> # bad: [74fca6a42863ffacaf7ba6f1936a9f228950f657] Linux 2.6.31
> # good: [07a2039b8eb0af4ff464efd3dfd95de5c02648c6] Linux 2.6.30
> git bisect start 'v2.6.31' 'v2.6.30'
> # good: [925d74ae717c9a12d3618eb4b36b9fb632e2cef3] V4L/DVB (11736):
> videobuf: modify return value of VIDIOC_REQBUFS ioctl
> git bisect good 925d74ae717c9a12d3618eb4b36b9fb632e2cef3
> # bad: [a380137900fca5c79e6daa9500bdb6ea5649188e] ixgbe: Fix device
> capabilities of 82599 single speed fiber NICs.
> git bisect bad a380137900fca5c79e6daa9500bdb6ea5649188e
> # good: [1dbb5765acc7a6fe4bc1957c001037cc9d02ae03] Staging: android:
> lowmemorykiller: fix up remaining checkpatch warnings
> git bisect good 1dbb5765acc7a6fe4bc1957c001037cc9d02ae03
> # good: [df36b439c5fedefe013d4449cb6a50d15e2f4d70] Merge branch
> 'for-2.6.31' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6
> git bisect good df36b439c5fedefe013d4449cb6a50d15e2f4d70
> # bad: [a800faec1b21d7133b5f0c8c6dac593b7c4e118d] Merge branch 'for-linus'
> of git://www.jni.nu/cris
> git bisect bad a800faec1b21d7133b5f0c8c6dac593b7c4e118d
> # good: [ac1b7c378ef26fba6694d5f118fe7fc16fee2fe2] Merge
> git://git.infradead.org/mtd-2.6
> git bisect good ac1b7c378ef26fba6694d5f118fe7fc16fee2fe2
> # bad: [37c6dbe290c05023b47f52528e30ce51336b93eb] V4L/DVB (12091):
> gspca_sonixj: Add light frequency control
> git bisect bad 37c6dbe290c05023b47f52528e30ce51336b93eb
> # bad: [687d680985b1438360a9ba470ece8b57cd205c3b] Merge
> git://git.infradead.org/~dwmw2/iommu-2.6.31
> git bisect bad 687d680985b1438360a9ba470ece8b57cd205c3b
> # bad: [1053414068bad659479e6efa62a67403b8b1ec0a] Merge branch 'for-linus'
> of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
> git bisect bad 1053414068bad659479e6efa62a67403b8b1ec0a
> # good: [b01b4babbf204443b5a846a7494546501614cefc] firewire: net: fix card
> driver reloading
> git bisect good b01b4babbf204443b5a846a7494546501614cefc
> # bad: [c02d7adf8c5429727a98bad1d039bccad4c61c50] NFSv4: Replace
> nfs4_path_walk() with VFS path lookup in a private namespace
> git bisect bad c02d7adf8c5429727a98bad1d039bccad4c61c50
> # good: [616511d039af402670de8500d0e24495113a9cab] VFS: Uninline the
> function put_mnt_ns()
> git bisect good 616511d039af402670de8500d0e24495113a9cab
> # good: [cf8d2c11cb77f129675478792122f50827e5b0ae] VFS: Add VFS helper
> functions for setting up private namespaces
> git bisect good cf8d2c11cb77f129675478792122f50827e5b0ae
> 
> 
> The last "git bisect good" prints out:
> 
> server10:/usr/src/linux # git bisect good
> c02d7adf8c5429727a98bad1d039bccad4c61c50 is the first bad commit
> commit c02d7adf8c5429727a98bad1d039bccad4c61c50
> Author: Trond Myklebust <Trond.Myklebust@netapp.com>
> Date:   Mon Jun 22 15:09:14 2009 -0400
> 
>     NFSv4: Replace nfs4_path_walk() with VFS path lookup in a private
> namespace
>     
>     As noted in the previous patch, the NFSv4 client mount code currently
>     has several limitations. If the mount path contains symlinks, or
>     referrals, or even if it just contains a '..', then the client code in
>     nfs4_path_walk() will fail with an error.
>     
>     This patch replaces the nfs4_path_walk()-based lookup with a helper
>     function that sets up a private namespace to represent the namespace
> on the
>     server, then uses the ordinary VFS and NFS path lookup code to walk
> down the
>     mount path in that namespace.
>     
>     Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
>     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
> 
> :040000 040000 97a18818f26ab9a0987f157257eb6f399c3cc1cc
> 9ab6c712bb64f1349b5ac9f2020191abb5780ca0 M      fs
> 
> Does this help you any further?
> 
> Thanks!
> Robert

Looks suspiciously like some error in testing.
Could you pls retest and verify again that cf8d2c11cb77f129675478792122f50827e5b0ae
is good and c02d7adf8c5429727a98bad1d039bccad4c61c50 is bad?

-- 
MST

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