linux-kernel - 2.6.39-rc1 regression: NFS - unable to mount some shares (bisected)

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Message-ID: <20110330203823.GA3228@dtor-ws.eng.vmware.com>
Date:	Wed, 30 Mar 2011 13:38:23 -0700
From:	Dmitry Torokhov <dtor@...are.com>
To:	linux-kernel@...r.kernel.org
Cc:	Bryan Schumaker <bjschuma@...app.com>,
	Trond Myklebust <Trond.Myklebust@...app.com>
Subject: 2.6.39-rc1 regression: NFS - unable to mount some shares (bisected)

Hi,

The following commit appears to the open preventng me from mounting some
of my NFS shares (not all, of them, just some):

8f70e95f9f4159184f557a1db60c909d7c1bd2e3 is the first bad commit
commit 8f70e95f9f4159184f557a1db60c909d7c1bd2e3
Author: Bryan Schumaker <bjschuma@...app.com>
Date:   Thu Mar 24 17:12:31 2011 +0000

    NFS: Determine initial mount security

    When sec=<something> is not presented as a mount option,
    we should attempt to determine what security flavor the
    server is using.

    Signed-off-by: Bryan Schumaker <bjschuma@...app.com>
    Signed-off-by: Trond Myklebust <Trond.Myklebust@...app.com>

Here is the bisect log:

[dtor@...r-ws linus]$ git bisect log
git bisect start
# good: [4bbba111d94781d34081c37856bbc5eb33f6c72a] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
git bisect good 4bbba111d94781d34081c37856bbc5eb33f6c72a
# bad: [0ce790e7d736cedc563e1fb4e998babf5a4dbc3d] Linux 2.6.39-rc1
git bisect bad 0ce790e7d736cedc563e1fb4e998babf5a4dbc3d
# good: [e285c1746accb80620e511f9c72e9893beeedc0e] Merge branch 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
git bisect good e285c1746accb80620e511f9c72e9893beeedc0e
# bad: [8d49a77568d1105ff3e64aec484dac059f54824e] Merge branch 'for-2.6.39/drivers' of git://git.kernel.dk/linux-2.6-block
git bisect bad 8d49a77568d1105ff3e64aec484dac059f54824e
# bad: [5aafdea448fb86412a6f8e46df518c1545d32436] Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6
git bisect bad 5aafdea448fb86412a6f8e46df518c1545d32436
# bad: [9458ea567a72ebd3852c2d764d32c0f2fb61d0df] MIPS: IP22/IP28: Convert to new irq_chip functions
git bisect bad 9458ea567a72ebd3852c2d764d32c0f2fb61d0df
# good: [ae005cbed12d0b340b04b59d6f5c56e710b3895d] Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
git bisect good ae005cbed12d0b340b04b59d6f5c56e710b3895d
# bad: [1685f3b158a244d4f6e205e67c84483fffcb2d9f] MIPS: SMTC: Move declaration of smtc_init_secondary to <asm/smtc.h>.
git bisect bad 1685f3b158a244d4f6e205e67c84483fffcb2d9f
# good: [988b6dceb0ae6d642587c8594529b94f6be0c5ea] NFSv4.1: remove GETATTR from ds commits
git bisect good 988b6dceb0ae6d642587c8594529b94f6be0c5ea
# good: [35124a0994fc02545b14b9fa3aad000b3331f1c0] Cleanup XDR parsing for LAYOUTGET, GETDEVICEINFO
git bisect good 35124a0994fc02545b14b9fa3aad000b3331f1c0
# bad: [8f70e95f9f4159184f557a1db60c909d7c1bd2e3] NFS: Determine initial mount security
git bisect bad 8f70e95f9f4159184f557a1db60c909d7c1bd2e3
# good: [7c5130588d691a3b34d02312f1bd1b6d56fe0100] NFS: lookup supports s alternate client
git bisect good 7c5130588d691a3b34d02312f1bd1b6d56fe0100
# good: [7ebb931598cd95cccea10d4bc4c0123a464ea565] NFS: use secinfo when crossing mountpoints
git bisect good 7ebb931598cd95cccea10d4bc4c0123a464ea565

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