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Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-block

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* 'for-linus' of git://git.kernel.dk/linux-2.6-block:
  cfq-iosched: cache prio_tree root in cfqq->p_root
  cfq-iosched: fix bug with aliased request and cooperation detection
  cfq-iosched: clear ->prio_trees[] on cfqd alloc
  block: fix intermittent dm timeout based oops
  umem: fix request_queue lock warning
  block: simplify I/O stat accounting
  pktcdvd.h should include mempool.h
  cfq-iosched: use the default seek distance when there aren't enough seek samples
  cfq-iosched: make seek_mean converge more quickly
  block: make blk_abort_queue() ignore non-request based devices
  block: include empty disks in /proc/diskstats
  bio: use bio_kmalloc() in copy/map functions
  bio: fix bio_kmalloc()
  block: fix queue bounce limit setting
  block: fix SG_IO vector request data length handling
  scatterlist: make sure sg_miter_next() doesn't return 0 sized mappings
This commit is contained in:
Linus Torvalds
2009-04-24 07:48:24 -07:00
parent 596a5c4e43 f2d1f0ae78
commit 97c68d00db
16 changed files with 165 additions and 119 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/bio.c
+56 -66
View File
@@ -174,14 +174,6 @@ struct bio_vec *bvec_alloc_bs(gfp_t gfp_mask, int nr, unsigned long *idx,
{
struct bio_vec *bvl;
/*
* If 'bs' is given, lookup the pool and do the mempool alloc.
* If not, this is a bio_kmalloc() allocation and just do a
* kzalloc() for the exact number of vecs right away.
*/
if (!bs)
bvl = kmalloc(nr * sizeof(struct bio_vec), gfp_mask);
/*
* see comment near bvec_array define!
*/
@@ -260,21 +252,6 @@ void bio_free(struct bio *bio, struct bio_set *bs)
mempool_free(p, bs->bio_pool);
}
/*
* default destructor for a bio allocated with bio_alloc_bioset()
*/
static void bio_fs_destructor(struct bio *bio)
{
bio_free(bio, fs_bio_set);
}
static void bio_kmalloc_destructor(struct bio *bio)
{
if (bio_has_allocated_vec(bio))
kfree(bio->bi_io_vec);
kfree(bio);
}
void bio_init(struct bio *bio)
{
memset(bio, 0, sizeof(*bio));
@@ -301,21 +278,15 @@ void bio_init(struct bio *bio)
**/
struct bio *bio_alloc_bioset(gfp_t gfp_mask, int nr_iovecs, struct bio_set *bs)
{
unsigned long idx = BIO_POOL_NONE;
struct bio_vec *bvl = NULL;
struct bio *bio = NULL;
unsigned long idx = 0;
void *p = NULL;
struct bio *bio;
void *p;
if (bs) {
p = mempool_alloc(bs->bio_pool, gfp_mask);
if (!p)
goto err;
bio = p + bs->front_pad;
} else {
bio = kmalloc(sizeof(*bio), gfp_mask);
if (!bio)
goto err;
}
p = mempool_alloc(bs->bio_pool, gfp_mask);
if (unlikely(!p))
return NULL;
bio = p + bs->front_pad;
bio_init(bio);
@@ -332,22 +303,50 @@ struct bio *bio_alloc_bioset(gfp_t gfp_mask, int nr_iovecs, struct bio_set *bs)
nr_iovecs = bvec_nr_vecs(idx);
}
out_set:
bio->bi_flags |= idx << BIO_POOL_OFFSET;
bio->bi_max_vecs = nr_iovecs;
out_set:
bio->bi_io_vec = bvl;
return bio;
err_free:
if (bs)
mempool_free(p, bs->bio_pool);
else
kfree(bio);
err:
mempool_free(p, bs->bio_pool);
return NULL;
}
static void bio_fs_destructor(struct bio *bio)
{
bio_free(bio, fs_bio_set);
}
/**
* bio_alloc - allocate a new bio, memory pool backed
* @gfp_mask: allocation mask to use
* @nr_iovecs: number of iovecs
*
* Allocate a new bio with @nr_iovecs bvecs. If @gfp_mask
* contains __GFP_WAIT, the allocation is guaranteed to succeed.
*
* RETURNS:
* Pointer to new bio on success, NULL on failure.
*/
struct bio *bio_alloc(gfp_t gfp_mask, int nr_iovecs)
{
struct bio *bio = bio_alloc_bioset(gfp_mask, nr_iovecs, fs_bio_set);
if (bio)
bio->bi_destructor = bio_fs_destructor;
return bio;
}
static void bio_kmalloc_destructor(struct bio *bio)
{
if (bio_integrity(bio))
bio_integrity_free(bio);
kfree(bio);
}
/**
* bio_alloc - allocate a bio for I/O
* @gfp_mask: the GFP_ mask given to the slab allocator
@@ -366,29 +365,20 @@ err:
* do so can cause livelocks under memory pressure.
*
**/
struct bio *bio_alloc(gfp_t gfp_mask, int nr_iovecs)
{
struct bio *bio = bio_alloc_bioset(gfp_mask, nr_iovecs, fs_bio_set);
if (bio)
bio->bi_destructor = bio_fs_destructor;
return bio;
}
/*
* Like bio_alloc(), but doesn't use a mempool backing. This means that
* it CAN fail, but while bio_alloc() can only be used for allocations
* that have a short (finite) life span, bio_kmalloc() should be used
* for more permanent bio allocations (like allocating some bio's for
* initalization or setup purposes).
*/
struct bio *bio_kmalloc(gfp_t gfp_mask, int nr_iovecs)
{
struct bio *bio = bio_alloc_bioset(gfp_mask, nr_iovecs, NULL);
struct bio *bio;
if (bio)
bio->bi_destructor = bio_kmalloc_destructor;
bio = kmalloc(sizeof(struct bio) + nr_iovecs * sizeof(struct bio_vec),
gfp_mask);
if (unlikely(!bio))
return NULL;
bio_init(bio);
bio->bi_flags |= BIO_POOL_NONE << BIO_POOL_OFFSET;
bio->bi_max_vecs = nr_iovecs;
bio->bi_io_vec = bio->bi_inline_vecs;
bio->bi_destructor = bio_kmalloc_destructor;
return bio;
}
@@ -832,7 +822,7 @@ struct bio *bio_copy_user_iov(struct request_queue *q,
return ERR_PTR(-ENOMEM);
ret = -ENOMEM;
bio = bio_alloc(gfp_mask, nr_pages);
bio = bio_kmalloc(gfp_mask, nr_pages);
if (!bio)
goto out_bmd;
@@ -956,7 +946,7 @@ static struct bio *__bio_map_user_iov(struct request_queue *q,
if (!nr_pages)
return ERR_PTR(-EINVAL);
bio = bio_alloc(gfp_mask, nr_pages);
bio = bio_kmalloc(gfp_mask, nr_pages);
if (!bio)
return ERR_PTR(-ENOMEM);
@@ -1140,7 +1130,7 @@ static struct bio *__bio_map_kern(struct request_queue *q, void *data,
int offset, i;
struct bio *bio;
bio = bio_alloc(gfp_mask, nr_pages);
bio = bio_kmalloc(gfp_mask, nr_pages);
if (!bio)
return ERR_PTR(-ENOMEM);