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author | Christoph Hellwig <hch@infradead.org> | 2010-08-18 09:29:12 (GMT) |
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committer | Jens Axboe <jaxboe@fusionio.com> | 2010-09-10 10:35:39 (GMT) |
commit | c3b9a62c8f932f32a733d6b628f61f3f28345727 (patch) | |
tree | 623a150079db7883444cc404ffcc1e0af4b80b7a /fs | |
parent | 80f6c29d8a758650d5c9eac05074b4b3e8c266df (diff) | |
download | linux-c3b9a62c8f932f32a733d6b628f61f3f28345727.tar.xz |
btrfs: replace barriers with explicit flush / FUA usage
Switch to the WRITE_FLUSH_FUA flag for log writes, remove the EOPNOTSUPP
detection for barriers and stop setting the barrier flag for discards.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/btrfs/disk-io.c | 19 | ||||
-rw-r--r-- | fs/btrfs/extent-tree.c | 2 | ||||
-rw-r--r-- | fs/btrfs/volumes.c | 4 | ||||
-rw-r--r-- | fs/btrfs/volumes.h | 1 |
4 files changed, 5 insertions, 21 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 64f1008..5e789f4 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -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++; diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 32d0940..43dc9ea 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -1696,7 +1696,7 @@ 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_IFL_WAIT); } static int btrfs_discard_extent(struct btrfs_root *root, u64 bytenr, diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index dd318ff..e25e46a 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -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; diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 31b0fab..2b638b6 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -42,7 +42,6 @@ struct btrfs_device { int running_pending; u64 generation; - int barriers; int writeable; int in_fs_metadata; |