diff options
| author |   Michael Lyle <mlyle@lyle.org> | 2017-10-13 16:35:38 -0700 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2017-10-16 09:07:26 -0600 |
| commit | e41166c5c44e30dbd620f7c77a27efe5d5cc551a (patch) | |
| tree | ac09f29e7df62553409e7a36770e158464b4b6a2 /drivers/md/bcache/bcache.h | |
| parent | bcache: smooth writeback rate control (diff) | |
| download | linux-dev-e41166c5c44e30dbd620f7c77a27efe5d5cc551a.tar.xz linux-dev-e41166c5c44e30dbd620f7c77a27efe5d5cc551a.zip | |
bcache: writeback rate shouldn't artifically clamp
The previous code artificially limited writeback rate to 1000000
blocks/second (NSEC_PER_MSEC), which is a rate that can be met on fast
hardware. The rate limiting code works fine (though with decreased
precision) up to 3 orders of magnitude faster, so use NSEC_PER_SEC.
Additionally, ensure that uint32_t is used as a type for rate throughout
the rate management so that type checking/clamp_t can work properly.
bch_next_delay should be rewritten for increased precision and better
handling of high rates and long sleep periods, but this is adequate for
now.
Signed-off-by: Michael Lyle <mlyle@lyle.org>
Reported-by: Coly Li <colyli@suse.de>
Reviewed-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md/bcache/bcache.h')
| -rw-r--r-- | drivers/md/bcache/bcache.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h index eb83be693d60..d77c4829c497 100644 --- a/drivers/md/bcache/bcache.h +++ b/drivers/md/bcache/bcache.h @@ -361,7 +361,7 @@ struct cached_dev { int64_t writeback_rate_proportional; int64_t writeback_rate_integral; int64_t writeback_rate_integral_scaled; - int64_t writeback_rate_change; + int32_t writeback_rate_change; unsigned writeback_rate_update_seconds; unsigned writeback_rate_i_term_inverse; |