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authorLinus Torvalds <torvalds@linux-foundation.org>2014-03-07 09:59:44 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-03-07 09:59:44 -0800
commit2a75184d52f41db1f54ad9eee7fa8b3ad820f4ac (patch)
tree126192eee76510426ee08b9f3a2197ff766a0d50
parent8ab47d3ec77d94ad9a6bb01efd696e1e34cfe80d (diff)
parent739c3eea711a255df5ed1246face0a4dce5e589f (diff)
downloadlinux-2a75184d52f41db1f54ad9eee7fa8b3ad820f4ac.tar.gz
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe: "Small collection of fixes for 3.14-rc. It contains: - Three minor update to blk-mq from Christoph. - Reduce number of unaligned (< 4kb) in-flight writes on mtip32xx to two. From Micron. - Make the blk-mq CPU notify spinlock raw, since it can't be a sleeper spinlock on RT. From Mike Galbraith. - Drop now bogus BUG_ON() for bio iteration with blk integrity. From Nic Bellinger. - Properly propagate the SYNC flag on requests. From Shaohua" * 'for-linus' of git://git.kernel.dk/linux-block: blk-mq: add REQ_SYNC early rt,blk,mq: Make blk_mq_cpu_notify_lock a raw spinlock bio-integrity: Drop bio_integrity_verify BUG_ON in post bip->bip_iter world blk-mq: support partial I/O completions blk-mq: merge blk_mq_insert_request and blk_mq_run_request blk-mq: remove blk_mq_alloc_rq mtip32xx: Reduce the number of unaligned writes to 2
-rw-r--r--block/blk-exec.c2
-rw-r--r--block/blk-flush.c4
-rw-r--r--block/blk-mq-cpu.c14
-rw-r--r--block/blk-mq.c102
-rw-r--r--block/blk-mq.h1
-rw-r--r--drivers/block/mtip32xx/mtip32xx.h2
-rw-r--r--fs/bio-integrity.c5
-rw-r--r--include/linux/blk-mq.h11
8 files changed, 39 insertions, 102 deletions
diff --git a/block/blk-exec.c b/block/blk-exec.c
index c68613bb4c79..dbf4502b1d67 100644
--- a/block/blk-exec.c
+++ b/block/blk-exec.c
@@ -65,7 +65,7 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
* be resued after dying flag is set
*/
if (q->mq_ops) {
- blk_mq_insert_request(q, rq, at_head, true);
+ blk_mq_insert_request(rq, at_head, true, false);
return;
}
diff --git a/block/blk-flush.c b/block/blk-flush.c
index 66e2b697f5db..f598f794c3c6 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -137,7 +137,7 @@ static void mq_flush_run(struct work_struct *work)
rq = container_of(work, struct request, mq_flush_work);
memset(&rq->csd, 0, sizeof(rq->csd));
- blk_mq_run_request(rq, true, false);
+ blk_mq_insert_request(rq, false, true, false);
}
static bool blk_flush_queue_rq(struct request *rq)
@@ -411,7 +411,7 @@ void blk_insert_flush(struct request *rq)
if ((policy & REQ_FSEQ_DATA) &&
!(policy & (REQ_FSEQ_PREFLUSH | REQ_FSEQ_POSTFLUSH))) {
if (q->mq_ops) {
- blk_mq_run_request(rq, false, true);
+ blk_mq_insert_request(rq, false, false, true);
} else
list_add_tail(&rq->queuelist, &q->queue_head);
return;
diff --git a/block/blk-mq-cpu.c b/block/blk-mq-cpu.c
index 3146befb56aa..136ef8643bba 100644
--- a/block/blk-mq-cpu.c
+++ b/block/blk-mq-cpu.c
@@ -11,7 +11,7 @@
#include "blk-mq.h"
static LIST_HEAD(blk_mq_cpu_notify_list);
-static DEFINE_SPINLOCK(blk_mq_cpu_notify_lock);
+static DEFINE_RAW_SPINLOCK(blk_mq_cpu_notify_lock);
static int blk_mq_main_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
@@ -19,12 +19,12 @@ static int blk_mq_main_cpu_notify(struct notifier_block *self,
unsigned int cpu = (unsigned long) hcpu;
struct blk_mq_cpu_notifier *notify;
- spin_lock(&blk_mq_cpu_notify_lock);
+ raw_spin_lock(&blk_mq_cpu_notify_lock);
list_for_each_entry(notify, &blk_mq_cpu_notify_list, list)
notify->notify(notify->data, action, cpu);
- spin_unlock(&blk_mq_cpu_notify_lock);
+ raw_spin_unlock(&blk_mq_cpu_notify_lock);
return NOTIFY_OK;
}
@@ -32,16 +32,16 @@ void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier)
{
BUG_ON(!notifier->notify);
- spin_lock(&blk_mq_cpu_notify_lock);
+ raw_spin_lock(&blk_mq_cpu_notify_lock);
list_add_tail(&notifier->list, &blk_mq_cpu_notify_list);
- spin_unlock(&blk_mq_cpu_notify_lock);
+ raw_spin_unlock(&blk_mq_cpu_notify_lock);
}
void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier)
{
- spin_lock(&blk_mq_cpu_notify_lock);
+ raw_spin_lock(&blk_mq_cpu_notify_lock);
list_del(&notifier->list);
- spin_unlock(&blk_mq_cpu_notify_lock);
+ raw_spin_unlock(&blk_mq_cpu_notify_lock);
}
void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier,
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 1fa9dd153fde..883f72089015 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -73,8 +73,8 @@ static void blk_mq_hctx_mark_pending(struct blk_mq_hw_ctx *hctx,
set_bit(ctx->index_hw, hctx->ctx_map);
}
-static struct request *blk_mq_alloc_rq(struct blk_mq_hw_ctx *hctx, gfp_t gfp,
- bool reserved)
+static struct request *__blk_mq_alloc_request(struct blk_mq_hw_ctx *hctx,
+ gfp_t gfp, bool reserved)
{
struct request *rq;
unsigned int tag;
@@ -193,12 +193,6 @@ static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
ctx->rq_dispatched[rw_is_sync(rw_flags)]++;
}
-static struct request *__blk_mq_alloc_request(struct blk_mq_hw_ctx *hctx,
- gfp_t gfp, bool reserved)
-{
- return blk_mq_alloc_rq(hctx, gfp, reserved);
-}
-
static struct request *blk_mq_alloc_request_pinned(struct request_queue *q,
int rw, gfp_t gfp,
bool reserved)
@@ -289,38 +283,10 @@ void blk_mq_free_request(struct request *rq)
__blk_mq_free_request(hctx, ctx, rq);
}
-static void blk_mq_bio_endio(struct request *rq, struct bio *bio, int error)
-{
- if (error)
- clear_bit(BIO_UPTODATE, &bio->bi_flags);
- else if (!test_bit(BIO_UPTODATE, &bio->bi_flags))
- error = -EIO;
-
- if (unlikely(rq->cmd_flags & REQ_QUIET))
- set_bit(BIO_QUIET, &bio->bi_flags);
-
- /* don't actually finish bio if it's part of flush sequence */
- if (!(rq->cmd_flags & REQ_FLUSH_SEQ))
- bio_endio(bio, error);
-}
-
-void blk_mq_end_io(struct request *rq, int error)
+bool blk_mq_end_io_partial(struct request *rq, int error, unsigned int nr_bytes)
{
- struct bio *bio = rq->bio;
- unsigned int bytes = 0;
-
- trace_block_rq_complete(rq->q, rq);
-
- while (bio) {
- struct bio *next = bio->bi_next;
-
- bio->bi_next = NULL;
- bytes += bio->bi_iter.bi_size;
- blk_mq_bio_endio(rq, bio, error);
- bio = next;
- }
-
- blk_account_io_completion(rq, bytes);
+ if (blk_update_request(rq, error, blk_rq_bytes(rq)))
+ return true;
blk_account_io_done(rq);
@@ -328,8 +294,9 @@ void blk_mq_end_io(struct request *rq, int error)
rq->end_io(rq, error);
else
blk_mq_free_request(rq);
+ return false;
}
-EXPORT_SYMBOL(blk_mq_end_io);
+EXPORT_SYMBOL(blk_mq_end_io_partial);
static void __blk_mq_complete_request_remote(void *data)
{
@@ -730,60 +697,27 @@ static void __blk_mq_insert_request(struct blk_mq_hw_ctx *hctx,
blk_mq_add_timer(rq);
}
-void blk_mq_insert_request(struct request_queue *q, struct request *rq,
- bool at_head, bool run_queue)
+void blk_mq_insert_request(struct request *rq, bool at_head, bool run_queue,
+ bool async)
{
+ struct request_queue *q = rq->q;
struct blk_mq_hw_ctx *hctx;
- struct blk_mq_ctx *ctx, *current_ctx;
+ struct blk_mq_ctx *ctx = rq->mq_ctx, *current_ctx;
+
+ current_ctx = blk_mq_get_ctx(q);
+ if (!cpu_online(ctx->cpu))
+ rq->mq_ctx = ctx = current_ctx;
- ctx = rq->mq_ctx;
hctx = q->mq_ops->map_queue(q, ctx->cpu);
- if (rq->cmd_flags & (REQ_FLUSH | REQ_FUA)) {
+ if (rq->cmd_flags & (REQ_FLUSH | REQ_FUA) &&
+ !(rq->cmd_flags & (REQ_FLUSH_SEQ))) {
blk_insert_flush(rq);
} else {
- current_ctx = blk_mq_get_ctx(q);
-
- if (!cpu_online(ctx->cpu)) {
- ctx = current_ctx;
- hctx = q->mq_ops->map_queue(q, ctx->cpu);
- rq->mq_ctx = ctx;
- }
spin_lock(&ctx->lock);
__blk_mq_insert_request(hctx, rq, at_head);
spin_unlock(&ctx->lock);
-
- blk_mq_put_ctx(current_ctx);
- }
-
- if (run_queue)
- __blk_mq_run_hw_queue(hctx);
-}
-EXPORT_SYMBOL(blk_mq_insert_request);
-
-/*
- * This is a special version of blk_mq_insert_request to bypass FLUSH request
- * check. Should only be used internally.
- */
-void blk_mq_run_request(struct request *rq, bool run_queue, bool async)
-{
- struct request_queue *q = rq->q;
- struct blk_mq_hw_ctx *hctx;
- struct blk_mq_ctx *ctx, *current_ctx;
-
- current_ctx = blk_mq_get_ctx(q);
-
- ctx = rq->mq_ctx;
- if (!cpu_online(ctx->cpu)) {
- ctx = current_ctx;
- rq->mq_ctx = ctx;
}
- hctx = q->mq_ops->map_queue(q, ctx->cpu);
-
- /* ctx->cpu might be offline */
- spin_lock(&ctx->lock);
- __blk_mq_insert_request(hctx, rq, false);
- spin_unlock(&ctx->lock);
blk_mq_put_ctx(current_ctx);
@@ -926,6 +860,8 @@ static void blk_mq_make_request(struct request_queue *q, struct bio *bio)
ctx = blk_mq_get_ctx(q);
hctx = q->mq_ops->map_queue(q, ctx->cpu);
+ if (is_sync)
+ rw |= REQ_SYNC;
trace_block_getrq(q, bio, rw);
rq = __blk_mq_alloc_request(hctx, GFP_ATOMIC, false);
if (likely(rq))
diff --git a/block/blk-mq.h b/block/blk-mq.h
index ed0035cd458e..72beba1f9d55 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -23,7 +23,6 @@ struct blk_mq_ctx {
};
void __blk_mq_complete_request(struct request *rq);
-void blk_mq_run_request(struct request *rq, bool run_queue, bool async);
void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async);
void blk_mq_init_flush(struct request_queue *q);
void blk_mq_drain_queue(struct request_queue *q);
diff --git a/drivers/block/mtip32xx/mtip32xx.h b/drivers/block/mtip32xx/mtip32xx.h
index b52e9a6d6aad..54174cb32feb 100644
--- a/drivers/block/mtip32xx/mtip32xx.h
+++ b/drivers/block/mtip32xx/mtip32xx.h
@@ -53,7 +53,7 @@
#define MTIP_FTL_REBUILD_TIMEOUT_MS 2400000
/* unaligned IO handling */
-#define MTIP_MAX_UNALIGNED_SLOTS 8
+#define MTIP_MAX_UNALIGNED_SLOTS 2
/* Macro to extract the tag bit number from a tag value. */
#define MTIP_TAG_BIT(tag) (tag & 0x1F)
diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
index 0129b78a6908..4f70f383132c 100644
--- a/fs/bio-integrity.c
+++ b/fs/bio-integrity.c
@@ -458,11 +458,10 @@ static int bio_integrity_verify(struct bio *bio)
struct blk_integrity_exchg bix;
struct bio_vec *bv;
sector_t sector = bio->bi_integrity->bip_iter.bi_sector;
- unsigned int sectors, total, ret;
+ unsigned int sectors, ret = 0;
void *prot_buf = bio->bi_integrity->bip_buf;
int i;
- ret = total = 0;
bix.disk_name = bio->bi_bdev->bd_disk->disk_name;
bix.sector_size = bi->sector_size;
@@ -484,8 +483,6 @@ static int bio_integrity_verify(struct bio *bio)
sectors = bv->bv_len / bi->sector_size;
sector += sectors;
prot_buf += sectors * bi->tuple_size;
- total += sectors * bi->tuple_size;
- BUG_ON(total > bio->bi_integrity->bip_iter.bi_size);
kunmap_atomic(kaddr);
}
diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 18ba8a627f46..2ff2e8d982be 100644
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -121,8 +121,7 @@ void blk_mq_init_commands(struct request_queue *, void (*init)(void *data, struc
void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule);
-void blk_mq_insert_request(struct request_queue *, struct request *,
- bool, bool);
+void blk_mq_insert_request(struct request *, bool, bool, bool);
void blk_mq_run_queues(struct request_queue *q, bool async);
void blk_mq_free_request(struct request *rq);
bool blk_mq_can_queue(struct blk_mq_hw_ctx *);
@@ -134,7 +133,13 @@ struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *, const int ctx_ind
struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_reg *, unsigned int);
void blk_mq_free_single_hw_queue(struct blk_mq_hw_ctx *, unsigned int);
-void blk_mq_end_io(struct request *rq, int error);
+bool blk_mq_end_io_partial(struct request *rq, int error,
+ unsigned int nr_bytes);
+static inline void blk_mq_end_io(struct request *rq, int error)
+{
+ bool done = !blk_mq_end_io_partial(rq, error, blk_rq_bytes(rq));
+ BUG_ON(!done);
+}
void blk_mq_complete_request(struct request *rq);