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| author |   Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-05-02 11:58:56 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2016-06-15 15:45:00 -0700 |
| commit | 4929c913bda505dbe44bb42c00da06011fee6c9d (patch) | |
| tree | aa11d64d780bba090f5e964308ab88c397340754 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | rcu: Disable TASKS_RCU for usermode Linux (diff) | |
| download | linux-dev-4929c913bda505dbe44bb42c00da06011fee6c9d.tar.xz linux-dev-4929c913bda505dbe44bb42c00da06011fee6c9d.zip | |
rcu: Make call_rcu_tasks() tolerate first call with irqs disabled
Currently, if the very first call to call_rcu_tasks() has irqs disabled,
it will create the rcu_tasks_kthread with irqs disabled, which will
result in a splat in the memory allocator, which kthread_run() invokes
with the expectation that irqs are enabled.
This commit fixes this problem by deferring kthread creation if called
with irqs disabled. The first call to call_rcu_tasks() that has irqs
enabled will create the kthread.
This bug was detected by rcutorture changes that were motivated by
Iftekhar Ahmed's mutation-testing efforts.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions