diff options
Diffstat (limited to 'include/linux/rcuclassic.h')
| -rw-r--r-- | include/linux/rcuclassic.h | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/include/linux/rcuclassic.h b/include/linux/rcuclassic.h index c847e59c600..04c728147be 100644 --- a/include/linux/rcuclassic.h +++ b/include/linux/rcuclassic.h @@ -66,11 +66,7 @@ static inline int rcu_batch_after(long a, long b) return (a - b) > 0; } -/* - * Per-CPU data for Read-Copy UPdate. - * nxtlist - new callbacks are added here - * curlist - current batch for which quiescent cycle started if any - */ +/* Per-CPU data for Read-Copy UPdate. */ struct rcu_data { /* 1) quiescent state handling : */ long quiescbatch; /* Batch # for grace period */ @@ -78,12 +74,24 @@ struct rcu_data { int qs_pending; /* core waits for quiesc state */ /* 2) batch handling */ - long batch; /* Batch # for current RCU batch */ + /* + * if nxtlist is not NULL, then: + * batch: + * The batch # for the last entry of nxtlist + * [*nxttail[1], NULL = *nxttail[2]): + * Entries that batch # <= batch + * [*nxttail[0], *nxttail[1]): + * Entries that batch # <= batch - 1 + * [nxtlist, *nxttail[0]): + * Entries that batch # <= batch - 2 + * The grace period for these entries has completed, and + * the other grace-period-completed entries may be moved + * here temporarily in rcu_process_callbacks(). + */ + long batch; struct rcu_head *nxtlist; - struct rcu_head **nxttail; + struct rcu_head **nxttail[3]; long qlen; /* # of queued callbacks */ - struct rcu_head *curlist; - struct rcu_head **curtail; struct rcu_head *donelist; struct rcu_head **donetail; long blimit; /* Upper limit on a processed batch */ |