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author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-10-23 11:41:22 -0700 |
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committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-10-29 10:07:04 -0700 |
commit | eca1a08986f622c11b75b3b44d561a1f901c9cec (patch) | |
tree | 15a635d885e693d2ee86aed4bcf988e8269d3606 /kernel/fork.c | |
parent | d7e29933969e5ca7c112ce1368a07911f4485dc2 (diff) |
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/fork.c')
0 files changed, 0 insertions, 0 deletions