| commit | 51c85631c697f7ab2a5eadda12b2b4065820516c | [log] [tgz] |
|---|---|---|
| author | Paul E. McKenney <paulmck@linux.ibm.com> | Wed Dec 12 12:32:06 2018 -0800 |
| committer | Paul E. McKenney <paulmck@linux.ibm.com> | Wed Dec 12 12:32:06 2018 -0800 |
| tree | 4de4c9322199d7fcfce56405418c4fb21531b253 | |
| parent | 8434e14edca91fe628132d0e34c8a9073312ad27 [diff] |
rcu: Add sysrq rcu_node-dump capability Life is hard if RCU manages to get stuck without triggering RCU CPU stall warnings or triggering the rcu_check_gp_start_stall() checks for failing to start a grace period. This commit therefore adds a boot-time-selectable sysrq key (commandeering "y") that allows manually dumping Tree RCU state. The new rcutree.sysrq_rcu kernel boot parameter must be set for this sysrq to be available. Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>