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| author | Zach Brown <zach.brown@oracle.com> | 2010-07-15 21:34:33 +0200 |
|---|---|---|
| committer | Andy Grover <andy.grover@oracle.com> | 2010-09-09 03:16:44 +0200 |
| commit | ea819867b788728aca60717e4fdacb3df771f670 (patch) | |
| tree | 68952e283e4b119622c6e8244d96e41c623ae4b0 /kernel/mutex.h | |
| parent | RDS/IB: print IB event strings as well as their number (diff) | |
| download | linux-ea819867b788728aca60717e4fdacb3df771f670.tar.xz linux-ea819867b788728aca60717e4fdacb3df771f670.zip | |
RDS/IB: protect the list of IB devices
The RDS IB device list wasn't protected by any locking. Traversal in
both the get_mr and FMR flushing paths could race with additon and
removal.
List manipulation is done with RCU primatives and is protected by the
write side of a rwsem. The list traversal in the get_mr fast path is
protected by a rcu read critical section. The FMR list traversal is
more problematic because it can block while traversing the list. We
protect this with the read side of the rwsem.
Signed-off-by: Zach Brown <zach.brown@oracle.com>
Diffstat (limited to 'kernel/mutex.h')
0 files changed, 0 insertions, 0 deletions