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| author | Vivek Goyal <vgoyal@redhat.com> | 2010-11-15 19:32:42 +0100 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2010-11-15 19:32:42 +0100 |
| commit | c2f6805d470af369a7337801deeecea800dbfe1c (patch) | |
| tree | 2381b8c512d611869877adfad3d5e0dfe75e668a /block | |
| parent | d69b78ba1deaaa95ffa8dac5a9ca819ce454d52e (diff) | |
| download | linux-c2f6805d470af369a7337801deeecea800dbfe1c.tar.gz linux-c2f6805d470af369a7337801deeecea800dbfe1c.tar.bz2 linux-c2f6805d470af369a7337801deeecea800dbfe1c.zip | |
blk-throttle: Fix calculation of max number of WRITES to be dispatched
o Currently we try to dispatch more READS and less WRITES (75%, 25%) in one
dispatch round. ummy pointed out that there is a bug in max_nr_writes
calculation. This patch fixes it.
Reported-by: ummy y <yummylln@yahoo.com.cn>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-throttle.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c index 56ad4531b412..004be80fd894 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -645,7 +645,7 @@ static int throtl_dispatch_tg(struct throtl_data *td, struct throtl_grp *tg, { unsigned int nr_reads = 0, nr_writes = 0; unsigned int max_nr_reads = throtl_grp_quantum*3/4; - unsigned int max_nr_writes = throtl_grp_quantum - nr_reads; + unsigned int max_nr_writes = throtl_grp_quantum - max_nr_reads; struct bio *bio; /* Try to dispatch 75% READS and 25% WRITES */ |