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| author | Jens Axboe <axboe@kernel.dk> | 2024-01-16 09:18:39 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-02-05 10:07:34 -0700 |
| commit | 06b23f92af87a84d70881b2ecaa72e00f7838264 (patch) | |
| tree | bf23c4626e3b3c5ab01d0661e0d1b6644d10c8bf /kernel/sched | |
| parent | da4c8c3d0975f031ef82d39927102e39fa6ddfac (diff) | |
| download | linux-06b23f92af87a84d70881b2ecaa72e00f7838264.tar.gz linux-06b23f92af87a84d70881b2ecaa72e00f7838264.tar.bz2 linux-06b23f92af87a84d70881b2ecaa72e00f7838264.zip | |
block: update cached timestamp post schedule/preemption
Mark the task as having a cached timestamp when set assign it, so we
can efficiently check if it needs updating post being scheduled back in.
This covers both the actual schedule out case, which would've flushed
the plug, and the preemption case which doesn't touch the plugged
requests (for many reasons, one of them being then we'd need to have
preemption disabled around plug state manipulation).
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 9116bcc90346..083f2258182d 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6787,10 +6787,12 @@ static inline void sched_submit_work(struct task_struct *tsk) static void sched_update_worker(struct task_struct *tsk) { - if (tsk->flags & (PF_WQ_WORKER | PF_IO_WORKER)) { + if (tsk->flags & (PF_WQ_WORKER | PF_IO_WORKER | PF_BLOCK_TS)) { + if (tsk->flags & PF_BLOCK_TS) + blk_plug_invalidate_ts(tsk); if (tsk->flags & PF_WQ_WORKER) wq_worker_running(tsk); - else + else if (tsk->flags & PF_IO_WORKER) io_wq_worker_running(tsk); } } |