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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-04-05 17:19:17 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2018-05-15 10:27:56 -0700 |
| commit | f7194ac32ca241d28765a98e42a7fe13debc85a7 (patch) | |
| tree | 788cdde1d2f7abe01e14b37004e89734cc642835 /kernel/rcu/rcutorture.c | |
| parent | 17672480fb1e953f999623b598a98130f8aacfbc (diff) | |
| download | lwn-f7194ac32ca241d28765a98e42a7fe13debc85a7.tar.gz lwn-f7194ac32ca241d28765a98e42a7fe13debc85a7.zip | |
srcu: Add cleanup_srcu_struct_quiesced()
The current cleanup_srcu_struct() flushes work, which prevents it
from being invoked from some workqueue contexts, as well as from
atomic (non-blocking) contexts. This patch therefore introduced a
cleanup_srcu_struct_quiesced(), which can be invoked only after all
activity on the specified srcu_struct has completed. This restriction
allows cleanup_srcu_struct_quiesced() to be invoked from workqueue
contexts as well as from atomic contexts.
Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Nitzan Carmi <nitzanc@mellanox.com>
Tested-by: Nicholas Piggin <npiggin@gmail.com>
Diffstat (limited to 'kernel/rcu/rcutorture.c')
| -rw-r--r-- | kernel/rcu/rcutorture.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 680c96d8c00f..f0e1d44459f8 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -593,7 +593,12 @@ static void srcu_torture_init(void) static void srcu_torture_cleanup(void) { - cleanup_srcu_struct(&srcu_ctld); + static DEFINE_TORTURE_RANDOM(rand); + + if (torture_random(&rand) & 0x800) + cleanup_srcu_struct(&srcu_ctld); + else + cleanup_srcu_struct_quiesced(&srcu_ctld); srcu_ctlp = &srcu_ctl; /* In case of a later rcutorture run. */ } |