openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

rcu: Account for rcu_all_qs() in cond_resched() 

If cond_resched() returns false, then it has already invoked
rcu_all_qs().  This is also invoked (now redundantly) by
rcu_note_voluntary_context_switch().  This commit therefore changes
cond_resched_rcu_qs() to invoke rcu_note_voluntary_context_switch_lite()
instead of rcu_note_voluntary_context_switch() to avoid the redundant
invocation of rcu_all_qs().

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2017-11-05 05:51:43 -08:00
parent f2b1760aed
commit dc259accec
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/rcupdate.h
View File

@ -197,7 +197,7 @@ static inline void exit_tasks_rcu_finish(void) { }
#define cond_resched_rcu_qs() \
do { \
if (!cond_resched()) \
rcu_note_voluntary_context_switch(current); \
rcu_note_voluntary_context_switch_lite(current); \
} while (0)
/*