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authorJens Axboe <axboe@kernel.dk>2019-04-22 18:47:36 +0300
committerJens Axboe <axboe@kernel.dk>2019-04-22 18:47:36 +0300
commit5c61ee2cd5860e41c8ab98837761ffaa93eb4dfe (patch)
tree0c78e25f5020eeee47863092ccbb2a3f56bea8a9 /block/bfq-iosched.c
parentcdf3e3deb747d5e193dee617ed37c83060eb576f (diff)
parent085b7755808aa11f78ab9377257e1dad2e6fa4bb (diff)
downloadlinux-5c61ee2cd5860e41c8ab98837761ffaa93eb4dfe.tar.xz
Merge tag 'v5.1-rc6' into for-5.2/block
Pull in v5.1-rc6 to resolve two conflicts. One is in BFQ, in just a comment, and is trivial. The other one is a conflict due to a later fix in the bio multi-page work, and needs a bit more care. * tag 'v5.1-rc6': (770 commits) Linux 5.1-rc6 block: make sure that bvec length can't be overflow block: kill all_q_node in request_queue x86/cpu/intel: Lower the "ENERGY_PERF_BIAS: Set to normal" message's log priority coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping mm/kmemleak.c: fix unused-function warning init: initialize jump labels before command line option parsing kernel/watchdog_hld.c: hard lockup message should end with a newline kcov: improve CONFIG_ARCH_HAS_KCOV help text mm: fix inactive list balancing between NUMA nodes and cgroups mm/hotplug: treat CMA pages as unmovable proc: fixup proc-pid-vm test proc: fix map_files test on F29 mm/vmstat.c: fix /proc/vmstat format for CONFIG_DEBUG_TLBFLUSH=y CONFIG_SMP=n mm/memory_hotplug: do not unlock after failing to take the device_hotplug_lock mm: swapoff: shmem_unuse() stop eviction without igrab() mm: swapoff: take notice of completion sooner mm: swapoff: remove too limiting SWAP_UNUSE_MAX_TRIES mm: swapoff: shmem_find_swap_entries() filter out other types slab: store tagged freelist for off-slab slabmgmt ... Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bfq-iosched.c')
-rw-r--r--block/bfq-iosched.c23
1 files changed, 14 insertions, 9 deletions
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index bcaa4bde3961..b85a4ab8b9db 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -3054,7 +3054,7 @@ static void bfq_dispatch_remove(struct request_queue *q, struct request *rq)
bfq_remove_request(q, rq);
}
-static void __bfq_bfqq_expire(struct bfq_data *bfqd, struct bfq_queue *bfqq)
+static bool __bfq_bfqq_expire(struct bfq_data *bfqd, struct bfq_queue *bfqq)
{
/*
* If this bfqq is shared between multiple processes, check
@@ -3089,9 +3089,11 @@ static void __bfq_bfqq_expire(struct bfq_data *bfqd, struct bfq_queue *bfqq)
/*
* All in-service entities must have been properly deactivated
* or requeued before executing the next function, which
- * resets all in-service entities as no more in service.
+ * resets all in-service entities as no more in service. This
+ * may cause bfqq to be freed. If this happens, the next
+ * function returns true.
*/
- __bfq_bfqd_reset_in_service(bfqd);
+ return __bfq_bfqd_reset_in_service(bfqd);
}
/**
@@ -3489,7 +3491,6 @@ void bfq_bfqq_expire(struct bfq_data *bfqd,
bool slow;
unsigned long delta = 0;
struct bfq_entity *entity = &bfqq->entity;
- int ref;
/*
* Check whether the process is slow (see bfq_bfqq_is_slow).
@@ -3582,10 +3583,8 @@ void bfq_bfqq_expire(struct bfq_data *bfqd,
* reason.
*/
__bfq_bfqq_recalc_budget(bfqd, bfqq, reason);
- ref = bfqq->ref;
- __bfq_bfqq_expire(bfqd, bfqq);
-
- if (ref == 1) /* bfqq is gone, no more actions on it */
+ if (__bfq_bfqq_expire(bfqd, bfqq))
+ /* bfqq is gone, no more actions on it */
return;
/* mark bfqq as waiting a request only if a bic still points to it */
@@ -5894,7 +5893,7 @@ static unsigned int bfq_update_depths(struct bfq_data *bfqd,
return min_shallow;
}
-static int bfq_init_hctx(struct blk_mq_hw_ctx *hctx, unsigned int index)
+static void bfq_depth_updated(struct blk_mq_hw_ctx *hctx)
{
struct bfq_data *bfqd = hctx->queue->elevator->elevator_data;
struct blk_mq_tags *tags = hctx->sched_tags;
@@ -5902,6 +5901,11 @@ static int bfq_init_hctx(struct blk_mq_hw_ctx *hctx, unsigned int index)
min_shallow = bfq_update_depths(bfqd, &tags->bitmap_tags);
sbitmap_queue_min_shallow_depth(&tags->bitmap_tags, min_shallow);
+}
+
+static int bfq_init_hctx(struct blk_mq_hw_ctx *hctx, unsigned int index)
+{
+ bfq_depth_updated(hctx);
return 0;
}
@@ -6325,6 +6329,7 @@ static struct elevator_type iosched_bfq_mq = {
.requests_merged = bfq_requests_merged,
.request_merged = bfq_request_merged,
.has_work = bfq_has_work,
+ .depth_updated = bfq_depth_updated,
.init_hctx = bfq_init_hctx,
.init_sched = bfq_init_queue,
.exit_sched = bfq_exit_queue,