From 7eaceaccab5f40bbfda044629a6298616aeaed50 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 10 Mar 2011 08:52:07 +0100 Subject: block: remove per-queue plugging Code has been converted over to the new explicit on-stack plugging, and delay users have been converted to use the new API for that. So lets kill off the old plugging along with aops->sync_page(). Signed-off-by: Jens Axboe --- drivers/md/md.c | 7 ------- 1 file changed, 7 deletions(-) (limited to 'drivers/md/md.c') diff --git a/drivers/md/md.c b/drivers/md/md.c index 0cc30ecda4c1..ca0d79c264b9 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -4812,7 +4812,6 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open) __md_stop_writes(mddev); md_stop(mddev); mddev->queue->merge_bvec_fn = NULL; - mddev->queue->unplug_fn = NULL; mddev->queue->backing_dev_info.congested_fn = NULL; /* tell userspace to handle 'inactive' */ @@ -6669,8 +6668,6 @@ EXPORT_SYMBOL_GPL(md_allow_write); void md_unplug(mddev_t *mddev) { - if (mddev->queue) - blk_unplug(mddev->queue); if (mddev->plug) mddev->plug->unplug_fn(mddev->plug); } @@ -6853,7 +6850,6 @@ void md_do_sync(mddev_t *mddev) >= mddev->resync_max - mddev->curr_resync_completed )) { /* time to update curr_resync_completed */ - md_unplug(mddev); wait_event(mddev->recovery_wait, atomic_read(&mddev->recovery_active) == 0); mddev->curr_resync_completed = j; @@ -6929,7 +6925,6 @@ void md_do_sync(mddev_t *mddev) * about not overloading the IO subsystem. (things like an * e2fsck being done on the RAID array should execute fast) */ - md_unplug(mddev); cond_resched(); currspeed = ((unsigned long)(io_sectors-mddev->resync_mark_cnt))/2 @@ -6948,8 +6943,6 @@ void md_do_sync(mddev_t *mddev) * this also signals 'finished resyncing' to md_stop */ out: - md_unplug(mddev); - wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active)); /* tell personality that we are finished */ -- cgit v1.2.3 From 721a9602e6607417c6bc15b18e97a2f35266c690 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Wed, 9 Mar 2011 11:56:30 +0100 Subject: block: kill off REQ_UNPLUG With the plugging now being explicitly controlled by the submitter, callers need not pass down unplugging hints to the block layer. If they want to unplug, it's because they manually plugged on their own - in which case, they should just unplug at will. Signed-off-by: Jens Axboe --- drivers/md/md.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'drivers/md/md.c') diff --git a/drivers/md/md.c b/drivers/md/md.c index ca0d79c264b9..28f9c1ee4e3a 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -777,8 +777,7 @@ void md_super_write(mddev_t *mddev, mdk_rdev_t *rdev, bio->bi_end_io = super_written; atomic_inc(&mddev->pending_writes); - submit_bio(REQ_WRITE | REQ_SYNC | REQ_UNPLUG | REQ_FLUSH | REQ_FUA, - bio); + submit_bio(REQ_WRITE | REQ_SYNC | REQ_FLUSH | REQ_FUA, bio); } void md_super_wait(mddev_t *mddev) @@ -806,7 +805,7 @@ int sync_page_io(mdk_rdev_t *rdev, sector_t sector, int size, struct completion event; int ret; - rw |= REQ_SYNC | REQ_UNPLUG; + rw |= REQ_SYNC; bio->bi_bdev = (metadata_op && rdev->meta_bdev) ? rdev->meta_bdev : rdev->bdev; -- cgit v1.2.3 From a91a2785b200864aef2270ed6a3babac7a253a20 Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Thu, 17 Mar 2011 11:11:05 +0100 Subject: block: Require subsystems to explicitly allocate bio_set integrity mempool MD and DM create a new bio_set for every metadevice. Each bio_set has an integrity mempool attached regardless of whether the metadevice is capable of passing integrity metadata. This is a waste of memory. Instead we defer the allocation decision to MD and DM since we know at metadevice creation time whether integrity passthrough is needed or not. Automatic integrity mempool allocation can then be removed from bioset_create() and we make an explicit integrity allocation for the fs_bio_set. Signed-off-by: Martin K. Petersen Reported-by: Zdenek Kabelac Acked-by: Mike Snitzer Signed-off-by: Jens Axboe --- drivers/md/md.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'drivers/md/md.c') diff --git a/drivers/md/md.c b/drivers/md/md.c index 86ba66c0b28a..1876761f1828 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -1803,8 +1803,12 @@ int md_integrity_register(mddev_t *mddev) mdname(mddev)); return -EINVAL; } - printk(KERN_NOTICE "md: data integrity on %s enabled\n", - mdname(mddev)); + printk(KERN_NOTICE "md: data integrity enabled on %s\n", mdname(mddev)); + if (bioset_integrity_create(mddev->bio_set, BIO_POOL_SIZE)) { + printk(KERN_ERR "md: failed to create integrity pool for %s\n", + mdname(mddev)); + return -EINVAL; + } return 0; } EXPORT_SYMBOL(md_integrity_register); -- cgit v1.2.3 From 89078d572eb9ce8d4c04264b8b0ba86de0d74c8f Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Mon, 28 Mar 2011 20:09:12 -0400 Subject: md: Fix integrity registration error when no devices are capable We incorrectly returned -EINVAL when none of the devices in the array had an integrity profile. This in turn prevented mdadm from starting the metadevice. Fix this so we only return errors on mismatched profiles and memory allocation failures. Reported-by: Giacomo Catenazzi Reported-by: Thomas Gleixner Signed-off-by: Martin K. Petersen Signed-off-by: Linus Torvalds --- drivers/md/md.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) (limited to 'drivers/md/md.c') diff --git a/drivers/md/md.c b/drivers/md/md.c index 06ecea751a39..8b66e04c2ea6 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -1777,12 +1777,6 @@ int md_integrity_register(mddev_t *mddev) continue; if (rdev->raid_disk < 0) continue; - /* - * If at least one rdev is not integrity capable, we can not - * enable data integrity for the md device. - */ - if (!bdev_get_integrity(rdev->bdev)) - return -EINVAL; if (!reference) { /* Use the first rdev as the reference */ reference = rdev; @@ -1793,6 +1787,8 @@ int md_integrity_register(mddev_t *mddev) rdev->bdev->bd_disk) < 0) return -EINVAL; } + if (!reference || !bdev_get_integrity(reference->bdev)) + return 0; /* * All component devices are integrity capable and have matching * profiles, register the common profile for the md device. -- cgit v1.2.3