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authorTrond Myklebust <Trond.Myklebust@netapp.com>2013-01-27 14:20:49 -0500
committerTrond Myklebust <Trond.Myklebust@netapp.com>2013-01-30 17:45:14 -0500
commitedd2e36fe8bd3cec4fa67e746d4c4a9246d0830e (patch)
treed44df6639a2431212bcb50f6117ba7b1083dc67d /fs/nfs/nfs4state.c
parentab225417825963b6dc66be7ea80f94ac1378dfdf (diff)
downloadlwn-edd2e36fe8bd3cec4fa67e746d4c4a9246d0830e.tar.gz
lwn-edd2e36fe8bd3cec4fa67e746d4c4a9246d0830e.zip
SUNRPC: When changing the queue priority, ensure that we change the owner
This fixes a livelock in the xprt->sending queue where we end up never making progress on lower priority tasks because sleep_on_priority() keeps adding new tasks with the same owner to the head of the queue, and priority bumps mean that we keep resetting the queue->owner to whatever task is at the head of the queue. Regression introduced by commit c05eecf636101dd4347b2d8fa457626bf0088e0a (SUNRPC: Don't allow low priority tasks to pre-empt higher priority ones). Reported-by: Andy Adamson <andros@netapp.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/nfs4state.c')
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