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| author | Tao Cui <cuitao@kylinos.cn> | 2026-09-22 12:38:54 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-10-16 08:21:06 -0600 |
| commit | febdbf5682fa7e8f325b07a2c115e7632c4252bd (patch) | |
| tree | c285126cf4d29a5a561278f973919525d6c10059 | |
| parent | f8bc5c74d9eccc87d2e27767f92b8c11b3315d72 (diff) | |
| download | linux-next-febdbf5682fa7e8f325b07a2c115e7632c4252bd.tar.gz linux-next-febdbf5682fa7e8f325b07a2c115e7632c4252bd.zip | |
blk-iocost: charge zone appends as writes
Zone append is a primary write operation for zoned devices; zoned xfs
and btrfs use it for data writes. It is priced at zero, so the zone
append portion of zoned workloads runs outside the controller: a
1%-weight cgroup issued 16000 appends at zero cost on a zoned null_blk.
Treat REQ_OP_ZONE_APPEND the same as REQ_OP_WRITE so it goes through
the existing seq/rand classification and charging.
Fixes: 0512a75b98f8 ("block: Introduce REQ_OP_ZONE_APPEND")
Signed-off-by: Tao Cui <cuitao@kylinos.cn>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://patch.msgid.link/20260922043856.2020116-3-cui.tao@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/blk-iocost.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-iocost.c b/block/blk-iocost.c index 546458246cf9..6b262ccb6b32 100644 --- a/block/blk-iocost.c +++ b/block/blk-iocost.c @@ -2557,6 +2557,7 @@ static void calc_vtime_cost_builtin(struct bio *bio, struct ioc_gq *iocg, coef_randio = ioc->params.lcoefs[LCOEF_RRANDIO]; coef_page = ioc->params.lcoefs[LCOEF_RPAGE]; break; + case REQ_OP_ZONE_APPEND: case REQ_OP_WRITE: coef_seqio = ioc->params.lcoefs[LCOEF_WSEQIO]; coef_randio = ioc->params.lcoefs[LCOEF_WRANDIO]; |