summaryrefslogtreecommitdiff
path: root/block
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2014-04-01 19:19:15 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-04-01 19:19:15 -0700
commit7a48837732f87a574ee3e1855927dc250117f565 (patch)
treef2e975a347d6d489e9f1932f9864fc978910def0 /block
parent1a0b6abaea78f73d9bc0a2f6df2d9e4c917cade1 (diff)
parent27fbf4e87c16bb3e40730890169a643a494b7c64 (diff)
downloadlinux-7a48837732f87a574ee3e1855927dc250117f565.tar.gz
linux-7a48837732f87a574ee3e1855927dc250117f565.tar.xz
Merge branch 'for-3.15/core' of git://git.kernel.dk/linux-block
Pull core block layer updates from Jens Axboe: "This is the pull request for the core block IO bits for the 3.15 kernel. It's a smaller round this time, it contains: - Various little blk-mq fixes and additions from Christoph and myself. - Cleanup of the IPI usage from the block layer, and associated helper code. From Frederic Weisbecker and Jan Kara. - Duplicate code cleanup in bio-integrity from Gu Zheng. This will give you a merge conflict, but that should be easy to resolve. - blk-mq notify spinlock fix for RT from Mike Galbraith. - A blktrace partial accounting bug fix from Roman Pen. - Missing REQ_SYNC detection fix for blk-mq from Shaohua Li" * 'for-3.15/core' of git://git.kernel.dk/linux-block: (25 commits) blk-mq: add REQ_SYNC early rt,blk,mq: Make blk_mq_cpu_notify_lock a raw spinlock 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 blk-mq: don't dump CPU -> hw queue map on driver load blk-mq: fix wrong usage of hctx->state vs hctx->flags blk-mq: allow blk_mq_init_commands() to return failure block: remove old blk_iopoll_enabled variable blktrace: fix accounting of partially completed requests smp: Rename __smp_call_function_single() to smp_call_function_single_async() smp: Remove wait argument from __smp_call_function_single() watchdog: Simplify a little the IPI call smp: Move __smp_call_function_single() below its safe version smp: Consolidate the various smp_call_function_single() declensions smp: Teach __smp_call_function_single() to check for offline cpus smp: Remove unused list_head from csd smp: Iterate functions through llist_for_each_entry_safe() block: Stop abusing rq->csd.list in blk-softirq block: Remove useless IPI struct initialization ...
Diffstat (limited to 'block')
-rw-r--r--block/blk-cgroup.c2
-rw-r--r--block/blk-core.c2
-rw-r--r--block/blk-ioc.c2
-rw-r--r--block/blk-iopoll.c3
-rw-r--r--block/blk-mq-cpumap.c10
-rw-r--r--block/blk-mq-sysfs.c31
-rw-r--r--block/blk-mq.c70
-rw-r--r--block/blk-mq.h2
-rw-r--r--block/blk-softirq.c19
-rw-r--r--block/cfq-iosched.c8
-rw-r--r--block/deadline-iosched.c8
-rw-r--r--block/partitions/atari.h4
-rw-r--r--block/partitions/efi.h9
-rw-r--r--block/partitions/karma.c3
14 files changed, 125 insertions, 48 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 4e491d9..b6e95b5 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -336,7 +336,7 @@ static void blkg_destroy(struct blkcg_gq *blkg)
* under queue_lock. If it's not pointing to @blkg now, it never
* will. Hint assignment itself can race safely.
*/
- if (rcu_dereference_raw(blkcg->blkg_hint) == blkg)
+ if (rcu_access_pointer(blkcg->blkg_hint) == blkg)
rcu_assign_pointer(blkcg->blkg_hint, NULL);
/*
diff --git a/block/blk-core.c b/block/blk-core.c
index bfe16d5..e45b321 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -2353,7 +2353,7 @@ bool blk_update_request(struct request *req, int error, unsigned int nr_bytes)
if (!req->bio)
return false;
- trace_block_rq_complete(req->q, req);
+ trace_block_rq_complete(req->q, req, nr_bytes);
/*
* For fs requests, rq is just carrier of independent bio's
diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index 242df01..1a27f45 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -68,7 +68,7 @@ static void ioc_destroy_icq(struct io_cq *icq)
* under queue_lock. If it's not pointing to @icq now, it never
* will. Hint assignment itself can race safely.
*/
- if (rcu_dereference_raw(ioc->icq_hint) == icq)
+ if (rcu_access_pointer(ioc->icq_hint) == icq)
rcu_assign_pointer(ioc->icq_hint, NULL);
ioc_exit_icq(icq);
diff --git a/block/blk-iopoll.c b/block/blk-iopoll.c
index 1855bf5..c11d24e 100644
--- a/block/blk-iopoll.c
+++ b/block/blk-iopoll.c
@@ -14,9 +14,6 @@
#include "blk.h"
-int blk_iopoll_enabled = 1;
-EXPORT_SYMBOL(blk_iopoll_enabled);
-
static unsigned int blk_iopoll_budget __read_mostly = 256;
static DEFINE_PER_CPU(struct list_head, blk_cpu_iopoll);
diff --git a/block/blk-mq-cpumap.c b/block/blk-mq-cpumap.c
index f872127..0979213 100644
--- a/block/blk-mq-cpumap.c
+++ b/block/blk-mq-cpumap.c
@@ -9,15 +9,6 @@
#include "blk.h"
#include "blk-mq.h"
-static void show_map(unsigned int *map, unsigned int nr)
-{
- int i;
-
- pr_info("blk-mq: CPU -> queue map\n");
- for_each_online_cpu(i)
- pr_info(" CPU%2u -> Queue %u\n", i, map[i]);
-}
-
static int cpu_to_queue_index(unsigned int nr_cpus, unsigned int nr_queues,
const int cpu)
{
@@ -85,7 +76,6 @@ int blk_mq_update_queue_map(unsigned int *map, unsigned int nr_queues)
map[i] = map[first_sibling];
}
- show_map(map, nr_cpus);
free_cpumask_var(cpus);
return 0;
}
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c
index b91ce75..b0ba264 100644
--- a/block/blk-mq-sysfs.c
+++ b/block/blk-mq-sysfs.c
@@ -244,6 +244,32 @@ static ssize_t blk_mq_hw_sysfs_tags_show(struct blk_mq_hw_ctx *hctx, char *page)
return blk_mq_tag_sysfs_show(hctx->tags, page);
}
+static ssize_t blk_mq_hw_sysfs_cpus_show(struct blk_mq_hw_ctx *hctx, char *page)
+{
+ unsigned int i, queue_num, first = 1;
+ ssize_t ret = 0;
+
+ blk_mq_disable_hotplug();
+
+ for_each_online_cpu(i) {
+ queue_num = hctx->queue->mq_map[i];
+ if (queue_num != hctx->queue_num)
+ continue;
+
+ if (first)
+ ret += sprintf(ret + page, "%u", i);
+ else
+ ret += sprintf(ret + page, ", %u", i);
+
+ first = 0;
+ }
+
+ blk_mq_enable_hotplug();
+
+ ret += sprintf(ret + page, "\n");
+ return ret;
+}
+
static struct blk_mq_ctx_sysfs_entry blk_mq_sysfs_dispatched = {
.attr = {.name = "dispatched", .mode = S_IRUGO },
.show = blk_mq_sysfs_dispatched_show,
@@ -294,6 +320,10 @@ static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_tags = {
.attr = {.name = "tags", .mode = S_IRUGO },
.show = blk_mq_hw_sysfs_tags_show,
};
+static struct blk_mq_hw_ctx_sysfs_entry blk_mq_hw_sysfs_cpus = {
+ .attr = {.name = "cpu_list", .mode = S_IRUGO },
+ .show = blk_mq_hw_sysfs_cpus_show,
+};
static struct attribute *default_hw_ctx_attrs[] = {
&blk_mq_hw_sysfs_queued.attr,
@@ -302,6 +332,7 @@ static struct attribute *default_hw_ctx_attrs[] = {
&blk_mq_hw_sysfs_pending.attr,
&blk_mq_hw_sysfs_ipi.attr,
&blk_mq_hw_sysfs_tags.attr,
+ &blk_mq_hw_sysfs_cpus.attr,
NULL,
};
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 883f720..b1bcc61 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -320,7 +320,7 @@ void __blk_mq_complete_request(struct request *rq)
rq->csd.func = __blk_mq_complete_request_remote;
rq->csd.info = rq;
rq->csd.flags = 0;
- __smp_call_function_single(ctx->cpu, &rq->csd, 0);
+ smp_call_function_single_async(ctx->cpu, &rq->csd);
} else {
rq->q->softirq_done_fn(rq);
}
@@ -514,7 +514,7 @@ static void __blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx)
LIST_HEAD(rq_list);
int bit, queued;
- if (unlikely(test_bit(BLK_MQ_S_STOPPED, &hctx->flags)))
+ if (unlikely(test_bit(BLK_MQ_S_STOPPED, &hctx->state)))
return;
hctx->run++;
@@ -603,7 +603,7 @@ static void __blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx)
void blk_mq_run_hw_queue(struct blk_mq_hw_ctx *hctx, bool async)
{
- if (unlikely(test_bit(BLK_MQ_S_STOPPED, &hctx->flags)))
+ if (unlikely(test_bit(BLK_MQ_S_STOPPED, &hctx->state)))
return;
if (!async)
@@ -623,7 +623,7 @@ void blk_mq_run_queues(struct request_queue *q, bool async)
queue_for_each_hw_ctx(q, hctx, i) {
if ((!blk_mq_hctx_has_pending(hctx) &&
list_empty_careful(&hctx->dispatch)) ||
- test_bit(BLK_MQ_S_STOPPED, &hctx->flags))
+ test_bit(BLK_MQ_S_STOPPED, &hctx->state))
continue;
blk_mq_run_hw_queue(hctx, async);
@@ -994,8 +994,46 @@ static void blk_mq_hctx_notify(void *data, unsigned long action,
blk_mq_put_ctx(ctx);
}
-static void blk_mq_init_hw_commands(struct blk_mq_hw_ctx *hctx,
- void (*init)(void *, struct blk_mq_hw_ctx *,
+static int blk_mq_init_hw_commands(struct blk_mq_hw_ctx *hctx,
+ int (*init)(void *, struct blk_mq_hw_ctx *,
+ struct request *, unsigned int),
+ void *data)
+{
+ unsigned int i;
+ int ret = 0;
+
+ for (i = 0; i < hctx->queue_depth; i++) {
+ struct request *rq = hctx->rqs[i];
+
+ ret = init(data, hctx, rq, i);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+int blk_mq_init_commands(struct request_queue *q,
+ int (*init)(void *, struct blk_mq_hw_ctx *,
+ struct request *, unsigned int),
+ void *data)
+{
+ struct blk_mq_hw_ctx *hctx;
+ unsigned int i;
+ int ret = 0;
+
+ queue_for_each_hw_ctx(q, hctx, i) {
+ ret = blk_mq_init_hw_commands(hctx, init, data);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(blk_mq_init_commands);
+
+static void blk_mq_free_hw_commands(struct blk_mq_hw_ctx *hctx,
+ void (*free)(void *, struct blk_mq_hw_ctx *,
struct request *, unsigned int),
void *data)
{
@@ -1004,12 +1042,12 @@ static void blk_mq_init_hw_commands(struct blk_mq_hw_ctx *hctx,
for (i = 0; i < hctx->queue_depth; i++) {
struct request *rq = hctx->rqs[i];
- init(data, hctx, rq, i);
+ free(data, hctx, rq, i);
}
}
-void blk_mq_init_commands(struct request_queue *q,
- void (*init)(void *, struct blk_mq_hw_ctx *,
+void blk_mq_free_commands(struct request_queue *q,
+ void (*free)(void *, struct blk_mq_hw_ctx *,
struct request *, unsigned int),
void *data)
{
@@ -1017,9 +1055,9 @@ void blk_mq_init_commands(struct request_queue *q,
unsigned int i;
queue_for_each_hw_ctx(q, hctx, i)
- blk_mq_init_hw_commands(hctx, init, data);
+ blk_mq_free_hw_commands(hctx, free, data);
}
-EXPORT_SYMBOL(blk_mq_init_commands);
+EXPORT_SYMBOL(blk_mq_free_commands);
static void blk_mq_free_rq_map(struct blk_mq_hw_ctx *hctx)
{
@@ -1430,6 +1468,16 @@ static int blk_mq_queue_reinit_notify(struct notifier_block *nb,
return NOTIFY_OK;
}
+void blk_mq_disable_hotplug(void)
+{
+ mutex_lock(&all_q_mutex);
+}
+
+void blk_mq_enable_hotplug(void)
+{
+ mutex_unlock(&all_q_mutex);
+}
+
static int __init blk_mq_init(void)
{
blk_mq_cpu_init();
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 72beba1..ebbe6ba 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -39,6 +39,8 @@ void blk_mq_init_cpu_notifier(struct blk_mq_cpu_notifier *notifier,
void blk_mq_register_cpu_notifier(struct blk_mq_cpu_notifier *notifier);
void blk_mq_unregister_cpu_notifier(struct blk_mq_cpu_notifier *notifier);
void blk_mq_cpu_init(void);
+void blk_mq_enable_hotplug(void);
+void blk_mq_disable_hotplug(void);
/*
* CPU -> queue mappings
diff --git a/block/blk-softirq.c b/block/blk-softirq.c
index 57790c1..ebd6b6f 100644
--- a/block/blk-softirq.c
+++ b/block/blk-softirq.c
@@ -30,8 +30,8 @@ static void blk_done_softirq(struct softirq_action *h)
while (!list_empty(&local_list)) {
struct request *rq;
- rq = list_entry(local_list.next, struct request, csd.list);
- list_del_init(&rq->csd.list);
+ rq = list_entry(local_list.next, struct request, queuelist);
+ list_del_init(&rq->queuelist);
rq->q->softirq_done_fn(rq);
}
}
@@ -45,9 +45,14 @@ static void trigger_softirq(void *data)
local_irq_save(flags);
list = this_cpu_ptr(&blk_cpu_done);
- list_add_tail(&rq->csd.list, list);
+ /*
+ * We reuse queuelist for a list of requests to process. Since the
+ * queuelist is used by the block layer only for requests waiting to be
+ * submitted to the device it is unused now.
+ */
+ list_add_tail(&rq->queuelist, list);
- if (list->next == &rq->csd.list)
+ if (list->next == &rq->queuelist)
raise_softirq_irqoff(BLOCK_SOFTIRQ);
local_irq_restore(flags);
@@ -65,7 +70,7 @@ static int raise_blk_irq(int cpu, struct request *rq)
data->info = rq;
data->flags = 0;
- __smp_call_function_single(cpu, data, 0);
+ smp_call_function_single_async(cpu, data);
return 0;
}
@@ -136,7 +141,7 @@ void __blk_complete_request(struct request *req)
struct list_head *list;
do_local:
list = this_cpu_ptr(&blk_cpu_done);
- list_add_tail(&req->csd.list, list);
+ list_add_tail(&req->queuelist, list);
/*
* if the list only contains our just added request,
@@ -144,7 +149,7 @@ do_local:
* entries there, someone already raised the irq but it
* hasn't run yet.
*/
- if (list->next == &req->csd.list)
+ if (list->next == &req->queuelist)
raise_softirq_irqoff(BLOCK_SOFTIRQ);
} else if (raise_blk_irq(ccpu, req))
goto do_local;
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 744833b..5873e4a 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -2367,10 +2367,10 @@ cfq_merged_requests(struct request_queue *q, struct request *rq,
* reposition in fifo if next is older than rq
*/
if (!list_empty(&rq->queuelist) && !list_empty(&next->queuelist) &&
- time_before(rq_fifo_time(next), rq_fifo_time(rq)) &&
+ time_before(next->fifo_time, rq->fifo_time) &&
cfqq == RQ_CFQQ(next)) {
list_move(&rq->queuelist, &next->queuelist);
- rq_set_fifo_time(rq, rq_fifo_time(next));
+ rq->fifo_time = next->fifo_time;
}
if (cfqq->next_rq == next)
@@ -2814,7 +2814,7 @@ static struct request *cfq_check_fifo(struct cfq_queue *cfqq)
return NULL;
rq = rq_entry_fifo(cfqq->fifo.next);
- if (time_before(jiffies, rq_fifo_time(rq)))
+ if (time_before(jiffies, rq->fifo_time))
rq = NULL;
cfq_log_cfqq(cfqq->cfqd, cfqq, "fifo=%p", rq);
@@ -3927,7 +3927,7 @@ static void cfq_insert_request(struct request_queue *q, struct request *rq)
cfq_log_cfqq(cfqd, cfqq, "insert_request");
cfq_init_prio_data(cfqq, RQ_CIC(rq));
- rq_set_fifo_time(rq, jiffies + cfqd->cfq_fifo_expire[rq_is_sync(rq)]);
+ rq->fifo_time = jiffies + cfqd->cfq_fifo_expire[rq_is_sync(rq)];
list_add_tail(&rq->queuelist, &cfqq->fifo);
cfq_add_rq_rb(rq);
cfqg_stats_update_io_add(RQ_CFQG(rq), cfqd->serving_group,
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index 9ef6640..a753df2 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -106,7 +106,7 @@ deadline_add_request(struct request_queue *q, struct request *rq)
/*
* set expire time and add to fifo list
*/
- rq_set_fifo_time(rq, jiffies + dd->fifo_expire[data_dir]);
+ rq->fifo_time = jiffies + dd->fifo_expire[data_dir];
list_add_tail(&rq->queuelist, &dd->fifo_list[data_dir]);
}
@@ -174,9 +174,9 @@ deadline_merged_requests(struct request_queue *q, struct request *req,
* and move into next position (next will be deleted) in fifo
*/
if (!list_empty(&req->queuelist) && !list_empty(&next->queuelist)) {
- if (time_before(rq_fifo_time(next), rq_fifo_time(req))) {
+ if (time_before(next->fifo_time, req->fifo_time)) {
list_move(&req->queuelist, &next->queuelist);
- rq_set_fifo_time(req, rq_fifo_time(next));
+ req->fifo_time = next->fifo_time;
}
}
@@ -230,7 +230,7 @@ static inline int deadline_check_fifo(struct deadline_data *dd, int ddir)
/*
* rq is expired!
*/
- if (time_after_eq(jiffies, rq_fifo_time(rq)))
+ if (time_after_eq(jiffies, rq->fifo_time))
return 1;
return 0;
diff --git a/block/partitions/atari.h b/block/partitions/atari.h
index fe2d32a..f2ec43b 100644
--- a/block/partitions/atari.h
+++ b/block/partitions/atari.h
@@ -11,6 +11,8 @@
* by Guenther Kelleter (guenther@pool.informatik.rwth-aachen.de)
*/
+#include <linux/compiler.h>
+
struct partition_info
{
u8 flg; /* bit 0: active; bit 7: bootable */
@@ -29,6 +31,6 @@ struct rootsector
u32 bsl_st; /* start of bad sector list */
u32 bsl_cnt; /* length of bad sector list */
u16 checksum; /* checksum for bootable disks */
-} __attribute__((__packed__));
+} __packed;
int atari_partition(struct parsed_partitions *state);
diff --git a/block/partitions/efi.h b/block/partitions/efi.h
index 4efcafb..abd0b192 100644
--- a/block/partitions/efi.h
+++ b/block/partitions/efi.h
@@ -32,6 +32,7 @@
#include <linux/major.h>
#include <linux/string.h>
#include <linux/efi.h>
+#include <linux/compiler.h>
#define MSDOS_MBR_SIGNATURE 0xaa55
#define EFI_PMBR_OSTYPE_EFI 0xEF
@@ -87,13 +88,13 @@ typedef struct _gpt_header {
*
* uint8_t reserved2[ BlockSize - 92 ];
*/
-} __attribute__ ((packed)) gpt_header;
+} __packed gpt_header;
typedef struct _gpt_entry_attributes {
u64 required_to_function:1;
u64 reserved:47;
u64 type_guid_specific:16;
-} __attribute__ ((packed)) gpt_entry_attributes;
+} __packed gpt_entry_attributes;
typedef struct _gpt_entry {
efi_guid_t partition_type_guid;
@@ -102,7 +103,7 @@ typedef struct _gpt_entry {
__le64 ending_lba;
gpt_entry_attributes attributes;
efi_char16_t partition_name[72 / sizeof (efi_char16_t)];
-} __attribute__ ((packed)) gpt_entry;
+} __packed gpt_entry;
typedef struct _gpt_mbr_record {
u8 boot_indicator; /* unused by EFI, set to 0x80 for bootable */
@@ -124,7 +125,7 @@ typedef struct _legacy_mbr {
__le16 unknown;
gpt_mbr_record partition_record[4];
__le16 signature;
-} __attribute__ ((packed)) legacy_mbr;
+} __packed legacy_mbr;
/* Functions */
extern int efi_partition(struct parsed_partitions *state);
diff --git a/block/partitions/karma.c b/block/partitions/karma.c
index 0ea1931..9721fa5 100644
--- a/block/partitions/karma.c
+++ b/block/partitions/karma.c
@@ -8,6 +8,7 @@
#include "check.h"
#include "karma.h"
+#include <linux/compiler.h>
int karma_partition(struct parsed_partitions *state)
{
@@ -26,7 +27,7 @@ int karma_partition(struct parsed_partitions *state)
} d_partitions[2];
u8 d_blank[208];
__le16 d_magic;
- } __attribute__((packed)) *label;
+ } __packed *label;
struct d_partition *p;
data = read_part_sector(state, 0, &sect);