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rcutorture: Don't do busted forward-progress testing

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The "busted" rcutorture type is an intentionally broken implementation
of RCU.  Doing forward-progress testing on this implementation is not
particularly meaningful on the one hand and can result in fatal abuse
of the memory allocator on the other.  This commit therefore disables
forward-progress testing of the "busted" rcutorture type.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
This commit is contained in:
Paul E. McKenney 2018-10-16 05:46:58 -07:00
parent 2e57bf97a6
commit 5ac7cdc298
1 changed files with 2 additions and 1 deletions
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3
kernel/rcu/rcutorture.c
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@ -1900,7 +1900,8 @@ static int __init rcu_torture_fwd_prog_init(void)
{
if (!fwd_progress)
return 0; /* Not requested, so don't do it. */
if (!cur_ops->stall_dur || cur_ops->stall_dur() <= 0) {
if (!cur_ops->stall_dur || cur_ops->stall_dur() <= 0 ||
cur_ops == &rcu_busted_ops) {
VERBOSE_TOROUT_STRING("rcu_torture_fwd_prog_init: Disabled, unsupported by RCU flavor under test");
return 0;
}