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authorPaolo Valente <paolo.valente@linaro.org>2021-01-25 22:02:47 +0300
committerJens Axboe <axboe@kernel.dk>2021-01-26 00:18:35 +0300
commit5a5436b98d5cd2714feaaa579cec49dd7f7057bb (patch)
treefe877239dfc354b243efd2a27ad48afcd5e065a1
parente673914d52f913584cc4c454dfcff2e8eb04533f (diff)
downloadlinux-5a5436b98d5cd2714feaaa579cec49dd7f7057bb.tar.xz
block, bfq: save also injection state on queue merging
To prevent injection information from being lost on bfq_queue merging, also the amount of service that a bfq_queue receives must be saved and restored when the bfq_queue is merged and split, respectively. Tested-by: Jan Kara <jack@suse.cz> Signed-off-by: Paolo Valente <paolo.valente@linaro.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--block/bfq-iosched.c8
-rw-r--r--block/bfq-iosched.h5
2 files changed, 13 insertions, 0 deletions
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 5d48cba07cb5..79d232d41027 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -1024,6 +1024,10 @@ bfq_bfqq_resume_state(struct bfq_queue *bfqq, struct bfq_data *bfqd,
else
bfq_clear_bfqq_IO_bound(bfqq);
+ bfqq->last_serv_time_ns = bic->saved_last_serv_time_ns;
+ bfqq->inject_limit = bic->saved_inject_limit;
+ bfqq->decrease_time_jif = bic->saved_decrease_time_jif;
+
bfqq->entity.new_weight = bic->saved_weight;
bfqq->ttime = bic->saved_ttime;
bfqq->io_start_time = bic->saved_io_start_time;
@@ -2748,6 +2752,10 @@ static void bfq_bfqq_save_state(struct bfq_queue *bfqq)
if (!bic)
return;
+ bic->saved_last_serv_time_ns = bfqq->last_serv_time_ns;
+ bic->saved_inject_limit = bfqq->inject_limit;
+ bic->saved_decrease_time_jif = bfqq->decrease_time_jif;
+
bic->saved_weight = bfqq->entity.orig_weight;
bic->saved_ttime = bfqq->ttime;
bic->saved_has_short_ttime = bfq_bfqq_has_short_ttime(bfqq);
diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h
index d15299d59f89..3f350fa3c5fd 100644
--- a/block/bfq-iosched.h
+++ b/block/bfq-iosched.h
@@ -444,6 +444,11 @@ struct bfq_io_cq {
unsigned long saved_wr_start_at_switch_to_srt;
unsigned int saved_wr_cur_max_time;
struct bfq_ttime saved_ttime;
+
+ /* Save also injection state */
+ u64 saved_last_serv_time_ns;
+ unsigned int saved_inject_limit;
+ unsigned long saved_decrease_time_jif;
};
/**