| commit | ec1fe396ff42e240c9b32111ee53665c5916fe5e | |
| author | Miroslav Benes <mbenes@suse.cz> | |
| Mon, 22 Dec 2014 19:10:12 +0000 (22 11:10 -0800) | ||
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | |
| Fri, 16 Jan 2015 07:33:16 +0000 (15 23:33 -0800) | ||
| tree | b9199fa245a072d9428e16d7faf24ae84246271a | treesnapshot (tar.gz zip) |
| parent | fb81a44b88e6173ed0f6e9d6a1afa5305fb63f6e | commitdiff |
rcu: Fix RCU CPU stall detection in tiny implementation
The tiny RCU CPU stall detection depends on *rcp->curtail not being
NULL. It is however a tail pointer and thus NULL by definition. Instead we
should check rcp->rcucblist for the presence of pending callbacks which
need to be processed. With this fix INFO about the stall is printed and
jiffies_stall (jiffies at next stall) correctly updated.
Note that the check for pending callback is necessary to avoid spurious
warnings if there are no pendings callbacks.
Signed-off-by: Miroslav Benes <mbenes@suse.cz>
[ paulmck: Fused identical "if" statements, ported to -rcu. ]
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
The tiny RCU CPU stall detection depends on *rcp->curtail not being
NULL. It is however a tail pointer and thus NULL by definition. Instead we
should check rcp->rcucblist for the presence of pending callbacks which
need to be processed. With this fix INFO about the stall is printed and
jiffies_stall (jiffies at next stall) correctly updated.
Note that the check for pending callback is necessary to avoid spurious
warnings if there are no pendings callbacks.
Signed-off-by: Miroslav Benes <mbenes@suse.cz>
[ paulmck: Fused identical "if" statements, ported to -rcu. ]
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| kernel/rcu/tiny_plugin.h | diffblobblamehistory |