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block: Require subsystems to explicitly allocate bio_set integrity mempool

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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 <martin.petersen@oracle.com>
Reported-by: Zdenek Kabelac <zkabelac@redhat.com>
Acked-by: Mike Snitzer <snizer@redhat.com>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
This commit is contained in:
Martin K. Petersen 2011-03-17 11:11:05 +01:00 committed by Jens Axboe
parent 82f04ab47e
commit a91a2785b2
11 changed files with 41 additions and 22 deletions
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7
drivers/md/dm-table.c
View File

@ -55,6 +55,7 @@ struct dm_table {
struct dm_target *targets;
unsigned discards_supported:1;
unsigned integrity_supported:1;
/*
* Indicates the rw permissions for the new logical
@ -859,7 +860,7 @@ int dm_table_alloc_md_mempools(struct dm_table *t)
return -EINVAL;
}
t->mempools = dm_alloc_md_mempools(type);
t->mempools = dm_alloc_md_mempools(type, t->integrity_supported);
if (!t->mempools)
return -ENOMEM;
@ -935,8 +936,10 @@ static int dm_table_prealloc_integrity(struct dm_table *t, struct mapped_device
struct dm_dev_internal *dd;
list_for_each_entry(dd, devices, list)
if (bdev_get_integrity(dd->dm_dev.bdev))
if (bdev_get_integrity(dd->dm_dev.bdev)) {
t->integrity_supported = 1;
return blk_integrity_register(dm_disk(md), NULL);
}
return 0;
}

12
drivers/md/dm.c
View File

@ -2620,9 +2620,10 @@ int dm_noflush_suspending(struct dm_target *ti)
}
EXPORT_SYMBOL_GPL(dm_noflush_suspending);
struct dm_md_mempools *dm_alloc_md_mempools(unsigned type)
struct dm_md_mempools *dm_alloc_md_mempools(unsigned type, unsigned integrity)
{
struct dm_md_mempools *pools = kmalloc(sizeof(*pools), GFP_KERNEL);
unsigned int pool_size = (type == DM_TYPE_BIO_BASED) ? 16 : MIN_IOS;
if (!pools)
return NULL;
@ -2639,13 +2640,18 @@ struct dm_md_mempools *dm_alloc_md_mempools(unsigned type)
if (!pools->tio_pool)
goto free_io_pool_and_out;
pools->bs = (type == DM_TYPE_BIO_BASED) ?
bioset_create(16, 0) : bioset_create(MIN_IOS, 0);
pools->bs = bioset_create(pool_size, 0);
if (!pools->bs)
goto free_tio_pool_and_out;
if (integrity && bioset_integrity_create(pools->bs, pool_size))
goto free_bioset_and_out;
return pools;
free_bioset_and_out:
bioset_free(pools->bs);
free_tio_pool_and_out:
mempool_destroy(pools->tio_pool);

2
drivers/md/dm.h
View File

@ -149,7 +149,7 @@ void dm_kcopyd_exit(void);
/*
* Mempool operations
*/
struct dm_md_mempools *dm_alloc_md_mempools(unsigned type);
struct dm_md_mempools *dm_alloc_md_mempools(unsigned type, unsigned integrity);
void dm_free_md_mempools(struct dm_md_mempools *pools);
#endif

3
drivers/md/linear.c
View File

@ -210,8 +210,7 @@ static int linear_run (mddev_t *mddev)
blk_queue_merge_bvec(mddev->queue, linear_mergeable_bvec);
mddev->queue->backing_dev_info.congested_fn = linear_congested;
mddev->queue->backing_dev_info.congested_data = mddev;
md_integrity_register(mddev);
return 0;
return md_integrity_register(mddev);
}
static void free_conf(struct rcu_head *head)

8
drivers/md/md.c
View File

@ -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);

7
drivers/md/multipath.c
View File

@ -315,7 +315,7 @@ static int multipath_remove_disk(mddev_t *mddev, int number)
p->rdev = rdev;
goto abort;
}
md_integrity_register(mddev);
err = md_integrity_register(mddev);
}
abort:
@ -489,7 +489,10 @@ static int multipath_run (mddev_t *mddev)
mddev->queue->backing_dev_info.congested_fn = multipath_congested;
mddev->queue->backing_dev_info.congested_data = mddev;
md_integrity_register(mddev);
if (md_integrity_register(mddev))
goto out_free_conf;
return 0;
out_free_conf:

3
drivers/md/raid0.c
View File

@ -379,8 +379,7 @@ static int raid0_run(mddev_t *mddev)
blk_queue_merge_bvec(mddev->queue, raid0_mergeable_bvec);
dump_zones(mddev);
md_integrity_register(mddev);
return 0;
return md_integrity_register(mddev);
}
static int raid0_stop(mddev_t *mddev)

5
drivers/md/raid1.c
View File

@ -1132,7 +1132,7 @@ static int raid1_remove_disk(mddev_t *mddev, int number)
p->rdev = rdev;
goto abort;
}
md_integrity_register(mddev);
err = md_integrity_register(mddev);
}
abort:
@ -2017,8 +2017,7 @@ static int run(mddev_t *mddev)
mddev->queue->backing_dev_info.congested_fn = raid1_congested;
mddev->queue->backing_dev_info.congested_data = mddev;
md_integrity_register(mddev);
return 0;
return md_integrity_register(mddev);
}
static int stop(mddev_t *mddev)

7
drivers/md/raid10.c
View File

@ -1188,7 +1188,7 @@ static int raid10_remove_disk(mddev_t *mddev, int number)
p->rdev = rdev;
goto abort;
}
md_integrity_register(mddev);
err = md_integrity_register(mddev);
}
abort:
@ -2343,7 +2343,10 @@ static int run(mddev_t *mddev)
if (conf->near_copies < conf->raid_disks)
blk_queue_merge_bvec(mddev->queue, raid10_mergeable_bvec);
md_integrity_register(mddev);
if (md_integrity_register(mddev))
goto out_free_conf;
return 0;
out_free_conf:

3
fs/bio-integrity.c
View File

@ -761,6 +761,9 @@ int bioset_integrity_create(struct bio_set *bs, int pool_size)
{
unsigned int max_slab = vecs_to_idx(BIO_MAX_PAGES);
if (bs->bio_integrity_pool)
return 0;
bs->bio_integrity_pool =
mempool_create_slab_pool(pool_size, bip_slab[max_slab].slab);

6
fs/bio.c
View File

@ -1636,9 +1636,6 @@ struct bio_set *bioset_create(unsigned int pool_size, unsigned int front_pad)
if (!bs->bio_pool)
goto bad;
if (bioset_integrity_create(bs, pool_size))
goto bad;
if (!biovec_create_pools(bs, pool_size))
return bs;
@ -1682,6 +1679,9 @@ static int __init init_bio(void)
if (!fs_bio_set)
panic("bio: can't allocate bios\n");
if (bioset_integrity_create(fs_bio_set, BIO_POOL_SIZE))
panic("bio: can't create integrity pool\n");
bio_split_pool = mempool_create_kmalloc_pool(BIO_SPLIT_ENTRIES,
sizeof(struct bio_pair));
if (!bio_split_pool)