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| author |   Miroslav Benes <mbenes@suse.cz> | 2014-12-22 11:10:12 -0800 |
|---|---|---|
| committer |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-01-15 23:33:16 -0800 |
| commit | ec1fe396ff42e240c9b32111ee53665c5916fe5e (patch) | |
| tree | b9199fa245a072d9428e16d7faf24ae84246271a /tools/testing/selftests | |
| parent | rcu: Add GP-kthread-starvation checks to CPU stall warnings (diff) | |
| download | linux-dev-ec1fe396ff42e240c9b32111ee53665c5916fe5e.tar.xz linux-dev-ec1fe396ff42e240c9b32111ee53665c5916fe5e.zip | |
rcu: Fix RCU CPU stall detection in tiny implementation
The tiny RCU CPU stall detection depends on *rcp->curtail not being
NULL. It is however a tail pointer and thus NULL by definition. Instead we
should check rcp->rcucblist for the presence of pending callbacks which
need to be processed. With this fix INFO about the stall is printed and
jiffies_stall (jiffies at next stall) correctly updated.
Note that the check for pending callback is necessary to avoid spurious
warnings if there are no pendings callbacks.
Signed-off-by: Miroslav Benes <mbenes@suse.cz>
[ paulmck: Fused identical "if" statements, ported to -rcu. ]
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'tools/testing/selftests')
0 files changed, 0 insertions, 0 deletions