lkml.org 
[lkml]   [2017]   [Jul]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH tip/core/rcu 07/13] rcutorture: Enable SRCU readers from timer handler
Date
Now that it is legal to invoke srcu_read_lock() and srcu_read_unlock()
for a given srcu_struct from both process context and {soft,}irq
handlers, it is time to test it. This commit therefore enables
testing of SRCU readers from rcutorture's timer handler, using in_task()
to determine whether or not it is safe to sleep in the SRCU read-side
critical sections.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---
kernel/rcu/rcutorture.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index aedc8f2ad955..8d59c82bec0b 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -522,7 +522,7 @@ static void srcu_read_delay(struct torture_random_state *rrsp)

delay = torture_random(rrsp) %
(nrealreaders * 2 * longdelay * uspertick);
- if (!delay)
+ if (!delay && in_task())
schedule_timeout_interruptible(longdelay);
else
rcu_read_delay(rrsp);
@@ -583,6 +583,7 @@ static struct rcu_torture_ops srcu_ops = {
.call = srcu_torture_call,
.cb_barrier = srcu_torture_barrier,
.stats = srcu_torture_stats,
+ .irq_capable = 1,
.name = "srcu"
};

@@ -615,6 +616,7 @@ static struct rcu_torture_ops srcud_ops = {
.call = srcu_torture_call,
.cb_barrier = srcu_torture_barrier,
.stats = srcu_torture_stats,
+ .irq_capable = 1,
.name = "srcud"
};

--
2.5.2
\
 
 \ /
  Last update: 2017-07-25 00:25    [W:0.177 / U:0.184 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site