diff options
| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-10-23 20:41:22 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-10-29 18:07:04 +0100 |
| commit | eca1a08986f622c11b75b3b44d561a1f901c9cec (patch) | |
| tree | 15a635d885e693d2ee86aed4bcf988e8269d3606 /kernel/rcu | |
| parent | rcu: Make rcu_barrier() understand about missing rcuo kthreads (diff) | |
| download | linux-eca1a08986f622c11b75b3b44d561a1f901c9cec.tar.xz linux-eca1a08986f622c11b75b3b44d561a1f901c9cec.zip | |
signal: Exit RCU read-side critical section on each pass through loop
The kill_pid_info() can potentially loop indefinitely if tasks are created
and deleted sufficiently quickly, and if this happens, this function
will remain in a single RCU read-side critical section indefinitely.
This commit therefore exits the RCU read-side critical section on each
pass through the loop. Because a race must happen to retry the loop,
this should have no performance impact in the common case.
Reported-by: Dave Jones <davej@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
Diffstat (limited to 'kernel/rcu')
0 files changed, 0 insertions, 0 deletions