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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-03-11 02:33:20 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2015-05-27 21:59:02 +0200 |
| commit | 0f41c0ddadfb3d5baffe62351c380e2881aacd58 (patch) | |
| tree | d0e4b7585f3016f68b6f9afd23342c4dba7e8f93 /init | |
| parent | rcu: Shut up spurious gcc uninitialized-variable warning (diff) | |
| download | linux-0f41c0ddadfb3d5baffe62351c380e2881aacd58.tar.xz linux-0f41c0ddadfb3d5baffe62351c380e2881aacd58.zip | |
rcu: Provide diagnostic option to slow down grace-period scans
Grace-period scans of the rcu_node combining tree normally
proceed quite quickly, so that it is very difficult to reproduce
races against them. This commit therefore allows grace-period
pre-initialization and cleanup to be artificially slowed down,
increasing race-reproduction probability. A pair of pairs of new
Kconfig parameters are provided, RCU_TORTURE_TEST_SLOW_PREINIT to
enable the slowing down of propagating CPU-hotplug changes up the
combining tree along with RCU_TORTURE_TEST_SLOW_PREINIT_DELAY to
specify the delay in jiffies, and RCU_TORTURE_TEST_SLOW_CLEANUP
to enable the slowing down of the end-of-grace-period cleanup scan
along with RCU_TORTURE_TEST_SLOW_CLEANUP_DELAY to specify the delay
in jiffies. Boot-time parameters named rcutree.gp_preinit_delay and
rcutree.gp_cleanup_delay allow these delays to be specified at boot time.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions