@@ -5431,8 +5431,8 @@
If there is more than one bit set, the readers
are entered from low-order bit up, and are
exited in the opposite order. For SRCU, the
- 0x1 bit is normal readers and the 0x2 bit is
- for NMI-safe readers.
+ 0x1 bit is normal readers, 0x2 NMI-safe readers,
+ and 0x4 light-weight readers.
rcutorture.shuffle_interval= [KNL]
Set task-shuffle interval (s). Shuffling tasks
@@ -658,6 +658,11 @@ static int srcu_torture_read_lock(void)
WARN_ON_ONCE(idx & ~0x1);
ret += idx << 1;
}
+ if (reader_flavor & 0x4) {
+ idx = srcu_read_lock_lite(srcu_ctlp);
+ WARN_ON_ONCE(idx & ~0x1);
+ ret += idx << 2;
+ }
return ret;
}
@@ -683,6 +688,8 @@ srcu_read_delay(struct torture_random_state *rrsp, struct rt_read_seg *rtrsp)
static void srcu_torture_read_unlock(int idx)
{
WARN_ON_ONCE((reader_flavor && (idx & ~reader_flavor)) || (!reader_flavor && (idx & ~0x1)));
+ if (reader_flavor & 0x4)
+ srcu_read_unlock_lite(srcu_ctlp, (idx & 0x4) >> 2);
if (reader_flavor & 0x2)
srcu_read_unlock_nmisafe(srcu_ctlp, (idx & 0x2) >> 1);
if ((reader_flavor & 0x1) || !(reader_flavor & 0x7))
This commit causes bit 0x4 of rcutorture.reader_flavor to select the new srcu_read_lock_lite() and srcu_read_unlock_lite() functions. Signed-off-by: Paul E. McKenney <paulmck@kernel.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Kent Overstreet <kent.overstreet@linux.dev> Cc: <bpf@vger.kernel.org> --- Documentation/admin-guide/kernel-parameters.txt | 4 ++-- kernel/rcu/rcutorture.c | 7 +++++++ 2 files changed, 9 insertions(+), 2 deletions(-)