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| author | Thomas Gleixner | 2017-11-23 16:29:05 +0100 |
|---|---|---|
| committer | Thomas Gleixner | 2017-11-23 16:29:05 +0100 |
| commit | 866c9b94ef968445c52214b3748ecc52a8491bca (patch) | |
| tree | 1fd073acb9be8e89e77b35c41e2964ac6feabee6 /drivers/md/bcache/util.c | |
| parent | timekeeping: Remove CONFIG_GENERIC_TIME_VSYSCALL_OLD (diff) | |
| parent | treewide: Remove TIMER_FUNC_TYPE and TIMER_DATA_TYPE casts (diff) | |
| download | kernel-qcow2-linux-866c9b94ef968445c52214b3748ecc52a8491bca.tar.gz kernel-qcow2-linux-866c9b94ef968445c52214b3748ecc52a8491bca.tar.xz kernel-qcow2-linux-866c9b94ef968445c52214b3748ecc52a8491bca.zip | |
Merge tag 'for-linus-timers-conversion-final-v4.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux into timers/urgent
Pull the last batch of manual timer conversions from Kees Cook:
- final batch of "non trivial" timer conversions (multi-tree dependencies,
things Coccinelle couldn't handle, etc).
- treewide conversions via Coccinelle, in 4 steps:
- DEFINE_TIMER() functions converted to struct timer_list * argument
- init_timer() -> setup_timer()
- setup_timer() -> timer_setup()
- setup_timer() -> timer_setup() (with a single embedded structure)
- deprecated timer API removals (init_timer(), setup_*timer())
- finalization of new API (remove global casts)
Diffstat (limited to 'drivers/md/bcache/util.c')
| -rw-r--r-- | drivers/md/bcache/util.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/md/bcache/util.c b/drivers/md/bcache/util.c index 176d3c2ef5f5..e548b8b51322 100644 --- a/drivers/md/bcache/util.c +++ b/drivers/md/bcache/util.c @@ -232,8 +232,14 @@ uint64_t bch_next_delay(struct bch_ratelimit *d, uint64_t done) d->next += div_u64(done * NSEC_PER_SEC, d->rate); - if (time_before64(now + NSEC_PER_SEC, d->next)) - d->next = now + NSEC_PER_SEC; + /* Bound the time. Don't let us fall further than 2 seconds behind + * (this prevents unnecessary backlog that would make it impossible + * to catch up). If we're ahead of the desired writeback rate, + * don't let us sleep more than 2.5 seconds (so we can notice/respond + * if the control system tells us to speed up!). + */ + if (time_before64(now + NSEC_PER_SEC * 5LLU / 2LLU, d->next)) + d->next = now + NSEC_PER_SEC * 5LLU / 2LLU; if (time_after64(now - NSEC_PER_SEC * 2, d->next)) d->next = now - NSEC_PER_SEC * 2; |