diff options
| author | Josef Bacik <jbacik@fb.com> | 2019-07-09 23:41:29 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-07-10 17:00:57 +0200 |
| commit | fd112c74652371a023f85d87b70bee7169e8f4d0 (patch) | |
| tree | a9d5510bf2510496172fadae327bf20ab909b560 | |
| parent | block: init flush rq ref count to 1 (diff) | |
| download | linux-fd112c74652371a023f85d87b70bee7169e8f4d0.tar.xz linux-fd112c74652371a023f85d87b70bee7169e8f4d0.zip | |
blk-cgroup: turn on psi memstall stuff
With the psi stuff in place we can use the memstall flag to indicate
pressure that happens from throttling.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/blk-cgroup.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 53b7bd4c7000..8afa52b0d148 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -29,6 +29,7 @@ #include <linux/ctype.h> #include <linux/blk-cgroup.h> #include <linux/tracehook.h> +#include <linux/psi.h> #include "blk.h" #define MAX_KEY_LEN 100 @@ -1587,6 +1588,7 @@ static void blkcg_scale_delay(struct blkcg_gq *blkg, u64 now) */ static void blkcg_maybe_throttle_blkg(struct blkcg_gq *blkg, bool use_memdelay) { + unsigned long pflags; u64 now = ktime_to_ns(ktime_get()); u64 exp; u64 delay_nsec = 0; @@ -1613,11 +1615,8 @@ static void blkcg_maybe_throttle_blkg(struct blkcg_gq *blkg, bool use_memdelay) */ delay_nsec = min_t(u64, delay_nsec, 250 * NSEC_PER_MSEC); - /* - * TODO: the use_memdelay flag is going to be for the upcoming psi stuff - * that hasn't landed upstream yet. Once that stuff is in place we need - * to do a psi_memstall_enter/leave if memdelay is set. - */ + if (use_memdelay) + psi_memstall_enter(&pflags); exp = ktime_add_ns(now, delay_nsec); tok = io_schedule_prepare(); @@ -1627,6 +1626,9 @@ static void blkcg_maybe_throttle_blkg(struct blkcg_gq *blkg, bool use_memdelay) break; } while (!fatal_signal_pending(current)); io_schedule_finish(tok); + + if (use_memdelay) + psi_memstall_leave(&pflags); } /** |