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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2013-12-05 23:56:54 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-02-17 23:55:58 +0100 |
| commit | 6e67669678d2d51b2bcf0411aeb629b4353a9880 (patch) | |
| tree | 954ea91326c4ca225a698ccb3d6e3c3f8ee4b3d0 /Documentation/memory-barriers.txt | |
| parent | Linux 3.14-rc3 (diff) | |
| download | linux-6e67669678d2d51b2bcf0411aeb629b4353a9880.tar.xz linux-6e67669678d2d51b2bcf0411aeb629b4353a9880.zip | |
documentation: Document call_rcu() safety mechanisms and limitations
The call_rcu() family of primitives will take action to accelerate
grace periods when the number of callbacks pending on a given CPU
becomes excessive. Although this safety mechanism can be useful,
it is no substitute for users of call_rcu() having rate-limit controls
in place. This commit adds this nuance to the documentation.
Reported-by: "Michael S. Tsirkin" <mst@redhat.com>
Reported-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'Documentation/memory-barriers.txt')
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