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authorLinus Torvalds <torvalds@linux-foundation.org>2016-01-20 02:03:34 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-20 02:03:34 +0300
commit7c24d9f3b27b198c3c4dfc8327a25fb077a96219 (patch)
treef4fd5e1cb119c71b0d3b0d7e104e02eedf539aaa /block/blk-core.c
parent99e38df892234aa985185fc776647bad6f9bd7a7 (diff)
parented8a9d2c816e0b0a2c5a605505e0f09ae9010dd6 (diff)
downloadlinux-7c24d9f3b27b198c3c4dfc8327a25fb077a96219.tar.xz
Merge branch 'for-4.5/core' of git://git.kernel.dk/linux-block
Pull core block updates from Jens Axboe: "We don't have a lot of core changes this time around, it's mostly in drivers, which will come in a subsequent pull. The cores changes include: - blk-mq - Prep patch from Christoph, changing blk_mq_alloc_request() to take flags instead of just using gfp_t for sleep/nosleep. - Doc patch from me, clarifying the difference between legacy and blk-mq for timer usage. - Fixes from Raghavendra for memory-less numa nodes, and a reuse of CPU masks. - Cleanup from Geliang Tang, using offset_in_page() instead of open coding it. - From Ilya, rename request_queue slab to it reflects what it holds, and a fix for proper use of bdgrab/put. - A real fix for the split across stripe boundaries from Keith. We yanked a broken version of this from 4.4-rc final, this one works. - From Mike Krinkin, emit a trace message when we split. - From Wei Tang, two small cleanups, not explicitly clearing memory that is already cleared" * 'for-4.5/core' of git://git.kernel.dk/linux-block: block: use bd{grab,put}() instead of open-coding block: split bios to max possible length block: add call to split trace point blk-mq: Avoid memoryless numa node encoded in hctx numa_node blk-mq: Reuse hardware context cpumask for tags blk-mq: add a flags parameter to blk_mq_alloc_request Revert "blk-flush: Queue through IO scheduler when flush not required" block: clarify blk_add_timer() use case for blk-mq bio: use offset_in_page macro block: do not initialise statics to 0 or NULL block: do not initialise globals to 0 or NULL block: rename request_queue slab cache
Diffstat (limited to 'block/blk-core.c')
-rw-r--r--block/blk-core.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index 33e2f62d5062..476244d59309 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -51,7 +51,7 @@ DEFINE_IDA(blk_queue_ida);
/*
* For the allocated request tables
*/
-struct kmem_cache *request_cachep = NULL;
+struct kmem_cache *request_cachep;
/*
* For queue allocation
@@ -646,7 +646,7 @@ struct request_queue *blk_alloc_queue(gfp_t gfp_mask)
}
EXPORT_SYMBOL(blk_alloc_queue);
-int blk_queue_enter(struct request_queue *q, gfp_t gfp)
+int blk_queue_enter(struct request_queue *q, bool nowait)
{
while (true) {
int ret;
@@ -654,7 +654,7 @@ int blk_queue_enter(struct request_queue *q, gfp_t gfp)
if (percpu_ref_tryget_live(&q->q_usage_counter))
return 0;
- if (!gfpflags_allow_blocking(gfp))
+ if (nowait)
return -EBUSY;
ret = wait_event_interruptible(q->mq_freeze_wq,
@@ -1292,7 +1292,9 @@ static struct request *blk_old_get_request(struct request_queue *q, int rw,
struct request *blk_get_request(struct request_queue *q, int rw, gfp_t gfp_mask)
{
if (q->mq_ops)
- return blk_mq_alloc_request(q, rw, gfp_mask, false);
+ return blk_mq_alloc_request(q, rw,
+ (gfp_mask & __GFP_DIRECT_RECLAIM) ?
+ 0 : BLK_MQ_REQ_NOWAIT);
else
return blk_old_get_request(q, rw, gfp_mask);
}
@@ -2060,8 +2062,7 @@ blk_qc_t generic_make_request(struct bio *bio)
do {
struct request_queue *q = bdev_get_queue(bio->bi_bdev);
- if (likely(blk_queue_enter(q, __GFP_DIRECT_RECLAIM) == 0)) {
-
+ if (likely(blk_queue_enter(q, false) == 0)) {
ret = q->make_request_fn(q, bio);
blk_queue_exit(q);
@@ -3534,7 +3535,7 @@ int __init blk_dev_init(void)
request_cachep = kmem_cache_create("blkdev_requests",
sizeof(struct request), 0, SLAB_PANIC, NULL);
- blk_requestq_cachep = kmem_cache_create("blkdev_queue",
+ blk_requestq_cachep = kmem_cache_create("request_queue",
sizeof(struct request_queue), 0, SLAB_PANIC, NULL);
return 0;