Kernel blocks during rsync to NFS-mounted directory exported from Sun OS machine
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== About == | == About == | ||
| - | * Kernel version: | + | * Kernel version: 2.6.27.29-170.2.79.fc10.x86_64 |
* [https://bugzilla.kernel.org/show_bug.cgi?id=14053 bug 14053] | * [https://bugzilla.kernel.org/show_bug.cgi?id=14053 bug 14053] | ||
| - | * Reported by: | + | * Reported by: Matthew Breeze (August 25, 2009) |
| - | * Fixed by: | + | * Fixed by: Trond Myklebust (August 28, 2009) |
== Symptoms == | == Symptoms == | ||
| - | + | * Fedora 10 machine and a Sun OS machine. | |
| - | + | * The Sun OS machine exports a ZFS filesystem (pool) to the Fedora 10 machine, which mounts it using a NFS v4 mount | |
| + | ** /etc/fstab: melon:/melon1 /melon1 nfs4 rw,rsize=8192,wsize=8192,timeo=14,intr | ||
| + | * Kernel panic when reading a large file (3 GB) through NFS | ||
| + | * Kernel panic when rsyncing to the mounted directory | ||
| + | * No ill effects on the Sun OS machine | ||
== Cause == | == Cause == | ||
| - | + | * Need to retransmit the entire request when xprt_transmit fails with a network error. | |
== Resolution == | == Resolution == | ||
| + | * This problem was fixed by commit [http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=2574cc9f4ffc6c681c9177111357efe5b76f0e36 2574cc9f4ffc6c681c9177111357efe5b76f0e36] | ||
| + | <pre> | ||
| + | commit 2574cc9f4ffc6c681c9177111357efe5b76f0e36 | ||
| + | Author: Trond Myklebust <Trond.Myklebust@netapp.com> | ||
| + | Date: Fri Aug 28 11:12:12 2009 -0400 | ||
| - | + | SUNRPC: Fix rpc_task_force_reencode | |
| - | + | ||
| - | + | This patch fixes the bug that was reported in | |
| + | http://bugzilla.kernel.org/show_bug.cgi?id=14053 | ||
| + | |||
| + | If we're in the case where we need to force a reencode and then resend of | ||
| + | the RPC request, due to xprt_transmit failing with a networking error, then | ||
| + | we _must_ retransmit the entire request. | ||
| + | |||
| + | Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com> | ||
| + | Cc: stable@kernel.org | ||
| + | Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> | ||
| + | </pre> | ||
Latest revision as of 19:46, 22 October 2010
Contents |
About
- Kernel version: 2.6.27.29-170.2.79.fc10.x86_64
- bug 14053
- Reported by: Matthew Breeze (August 25, 2009)
- Fixed by: Trond Myklebust (August 28, 2009)
Symptoms
- Fedora 10 machine and a Sun OS machine.
- The Sun OS machine exports a ZFS filesystem (pool) to the Fedora 10 machine, which mounts it using a NFS v4 mount
- /etc/fstab: melon:/melon1 /melon1 nfs4 rw,rsize=8192,wsize=8192,timeo=14,intr
- Kernel panic when reading a large file (3 GB) through NFS
- Kernel panic when rsyncing to the mounted directory
- No ill effects on the Sun OS machine
Cause
- Need to retransmit the entire request when xprt_transmit fails with a network error.
Resolution
- This problem was fixed by commit 2574cc9f4ffc6c681c9177111357efe5b76f0e36
commit 2574cc9f4ffc6c681c9177111357efe5b76f0e36
Author: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Fri Aug 28 11:12:12 2009 -0400
SUNRPC: Fix rpc_task_force_reencode
This patch fixes the bug that was reported in
http://bugzilla.kernel.org/show_bug.cgi?id=14053
If we're in the case where we need to force a reencode and then resend of
the RPC request, due to xprt_transmit failing with a networking error, then
we _must_ retransmit the entire request.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
