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| author |  Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| 2013-09-23 13:57:18 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| 2013-12-03 10:10:18 -0800 |
| commit | 6193c76aba8ec3cc5f083c35efbab9ed924125f6 (patch) | |
| tree | ff0d5698840948f5aef0fab9e7949d47a5d52ff4 /kernel/rcu/tree.h | |
| parent | Linux 3.13-rc2 (diff) | |
| download | linux-6193c76aba8ec3cc5f083c35efbab9ed924125f6.tar.gz linux-6193c76aba8ec3cc5f083c35efbab9ed924125f6.tar.bz2 linux-6193c76aba8ec3cc5f083c35efbab9ed924125f6.zip | |
rcu: Kick CPU halfway to RCU CPU stall warning
When an RCU CPU stall warning occurs, the CPU invokes resched_cpu() on
itself. This can help move the grace period forward in some situations,
but it would be even better to do this -before- the RCU CPU stall warning.
This commit therefore causes resched_cpu() to be called every five jiffies
once the system is halfway to an RCU CPU stall warning.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu/tree.h')
| -rw-r--r-- | kernel/rcu/tree.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h index 52be957c9fe2..8e34d8674a4e 100644 --- a/kernel/rcu/tree.h +++ b/kernel/rcu/tree.h @@ -453,6 +453,8 @@ struct rcu_state { /* but in jiffies. */ unsigned long jiffies_stall; /* Time at which to check */ /* for CPU stalls. */ + unsigned long jiffies_resched; /* Time at which to resched */ + /* a reluctant CPU. */ unsigned long gp_max; /* Maximum GP duration in */ /* jiffies. */ const char *name; /* Name of structure. */ |