diff options
Diffstat (limited to 'include/linux/res_counter.h')
| -rw-r--r-- | include/linux/res_counter.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h index 8cb1ecd420a..df8085acba1 100644 --- a/include/linux/res_counter.h +++ b/include/linux/res_counter.h @@ -25,6 +25,10 @@ struct res_counter { */ unsigned long long usage; /* + * the maximal value of the usage from the counter creation + */ + unsigned long long max_usage; + /* * the limit that usage cannot exceed */ unsigned long long limit; @@ -67,6 +71,7 @@ ssize_t res_counter_write(struct res_counter *counter, int member, enum { RES_USAGE, + RES_MAX_USAGE, RES_LIMIT, RES_FAILCNT, }; @@ -127,4 +132,13 @@ static inline bool res_counter_check_under_limit(struct res_counter *cnt) return ret; } +static inline void res_counter_reset_max(struct res_counter *cnt) +{ + unsigned long flags; + + spin_lock_irqsave(&cnt->lock, flags); + cnt->max_usage = cnt->usage; + spin_unlock_irqrestore(&cnt->lock, flags); +} + #endif |