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Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block

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* 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block: (46 commits)
  xen-blkfront: disable barrier/flush write support
  Added blk-lib.c and blk-barrier.c was renamed to blk-flush.c
  block: remove BLKDEV_IFL_WAIT
  aic7xxx_old: removed unused 'req' variable
  block: remove the BH_Eopnotsupp flag
  block: remove the BLKDEV_IFL_BARRIER flag
  block: remove the WRITE_BARRIER flag
  swap: do not send discards as barriers
  fat: do not send discards as barriers
  ext4: do not send discards as barriers
  jbd2: replace barriers with explicit flush / FUA usage
  jbd2: Modify ASYNC_COMMIT code to not rely on queue draining on barrier
  jbd: replace barriers with explicit flush / FUA usage
  nilfs2: replace barriers with explicit flush / FUA usage
  reiserfs: replace barriers with explicit flush / FUA usage
  gfs2: replace barriers with explicit flush / FUA usage
  btrfs: replace barriers with explicit flush / FUA usage
  xfs: replace barriers with explicit flush / FUA usage
  block: pass gfp_mask and flags to sb_issue_discard
  dm: convey that all flushes are processed as empty
  ...
This commit is contained in:
Linus Torvalds 2010-10-22 17:07:18 -07:00
commit a2887097f2
80 changed files with 845 additions and 1921 deletions
Download patch file Download diff file Expand all files Collapse all files

19
fs/btrfs/disk-io.c
View file

@ -2063,7 +2063,7 @@ static void btrfs_end_buffer_write_sync(struct buffer_head *bh, int uptodate)
if (uptodate) {
set_buffer_uptodate(bh);
} else {
if (!buffer_eopnotsupp(bh) && printk_ratelimit()) {
if (printk_ratelimit()) {
printk(KERN_WARNING "lost page write due to "
"I/O error on %s\n",
bdevname(bh->b_bdev, b));
@ -2200,21 +2200,10 @@ static int write_dev_supers(struct btrfs_device *device,
bh->b_end_io = btrfs_end_buffer_write_sync;
}
if (i == last_barrier && do_barriers && device->barriers) {
ret = submit_bh(WRITE_BARRIER, bh);
if (ret == -EOPNOTSUPP) {
printk("btrfs: disabling barriers on dev %s\n",
device->name);
set_buffer_uptodate(bh);
device->barriers = 0;
/* one reference for submit_bh */
get_bh(bh);
lock_buffer(bh);
ret = submit_bh(WRITE_SYNC, bh);
}
} else {
if (i == last_barrier && do_barriers)
ret = submit_bh(WRITE_FLUSH_FUA, bh);
else
ret = submit_bh(WRITE_SYNC, bh);
}
if (ret)
errors++;

3
fs/btrfs/extent-tree.c
View file

@ -1695,8 +1695,7 @@ static int remove_extent_backref(struct btrfs_trans_handle *trans,
static void btrfs_issue_discard(struct block_device *bdev,
u64 start, u64 len)
{
blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL,
BLKDEV_IFL_WAIT | BLKDEV_IFL_BARRIER);
blkdev_issue_discard(bdev, start >> 9, len >> 9, GFP_KERNEL, 0);
}
static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr,

4
fs/btrfs/volumes.c
View file

@ -398,7 +398,6 @@ static noinline int device_list_add(const char *path,
device->work.func = pending_bios_fn;
memcpy(device->uuid, disk_super->dev_item.uuid,
BTRFS_UUID_SIZE);
device->barriers = 1;
spin_lock_init(&device->io_lock);
device->name = kstrdup(path, GFP_NOFS);
if (!device->name) {
@ -462,7 +461,6 @@ static struct btrfs_fs_devices *clone_fs_devices(struct btrfs_fs_devices *orig)
device->devid = orig_dev->devid;
device->work.func = pending_bios_fn;
memcpy(device->uuid, orig_dev->uuid, sizeof(device->uuid));
device->barriers = 1;
spin_lock_init(&device->io_lock);
INIT_LIST_HEAD(&device->dev_list);
INIT_LIST_HEAD(&device->dev_alloc_list);
@ -1489,7 +1487,6 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
trans = btrfs_start_transaction(root, 0);
lock_chunks(root);
device->barriers = 1;
device->writeable = 1;
device->work.func = pending_bios_fn;
generate_random_uuid(device->uuid);
@ -3084,7 +3081,6 @@ static struct btrfs_device *add_missing_dev(struct btrfs_root *root,
return NULL;
list_add(&device->dev_list,
&fs_devices->devices);
device->barriers = 1;
device->dev_root = root->fs_info->dev_root;
device->devid = devid;
device->work.func = pending_bios_fn;

1
fs/btrfs/volumes.h
View file

@ -42,7 +42,6 @@ struct btrfs_device {
int running_pending;
u64 generation;
int barriers;
int writeable;
int in_fs_metadata;