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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-01-03 12:20:21 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-01-03 12:20:21 -0800 |
| commit | 3a562aee727a7bfbb3a37b1aa934118397dad701 (patch) | |
| tree | db6af4d8f75aa139d461bf7867977062a9e0d195 /fs | |
| parent | b6b4aafc99d7c8dbf7d9429bf054b591daab1ad0 (diff) | |
| parent | de7999afedff02c6631feab3ea726a0e8f8c3d40 (diff) | |
| download | linux-3a562aee727a7bfbb3a37b1aa934118397dad701.tar.bz2 | |
Merge tag 'for-5.5-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"A few fixes for btrfs:
- blkcg accounting problem with compression that could stall writes
- setting up blkcg bio for compression crashes due to NULL bdev
pointer
- fix possible infinite loop in writeback for nocow files (here
possible means almost impossible, 13 things that need to happen to
trigger it)"
* tag 'for-5.5-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
Btrfs: fix infinite loop during nocow writeback due to race
btrfs: fix compressed write bio blkcg attribution
btrfs: punt all bios created in btrfs_submit_compressed_write()
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/compression.c | 7 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 6 |
2 files changed, 9 insertions, 4 deletions
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c index ee834ef7beb4..43e1660f450f 100644 --- a/fs/btrfs/compression.c +++ b/fs/btrfs/compression.c @@ -447,7 +447,7 @@ blk_status_t btrfs_submit_compressed_write(struct inode *inode, u64 start, if (blkcg_css) { bio->bi_opf |= REQ_CGROUP_PUNT; - bio_associate_blkg_from_css(bio, blkcg_css); + kthread_associate_blkcg(blkcg_css); } refcount_set(&cb->pending_bios, 1); @@ -491,6 +491,8 @@ blk_status_t btrfs_submit_compressed_write(struct inode *inode, u64 start, bio->bi_opf = REQ_OP_WRITE | write_flags; bio->bi_private = cb; bio->bi_end_io = end_compressed_bio_write; + if (blkcg_css) + bio->bi_opf |= REQ_CGROUP_PUNT; bio_add_page(bio, page, PAGE_SIZE, 0); } if (bytes_left < PAGE_SIZE) { @@ -517,6 +519,9 @@ blk_status_t btrfs_submit_compressed_write(struct inode *inode, u64 start, bio_endio(bio); } + if (blkcg_css) + kthread_associate_blkcg(NULL); + return 0; } diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index e3c76645cad7..5509c41a4f43 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -1479,10 +1479,10 @@ next_slot: disk_num_bytes = btrfs_file_extent_disk_num_bytes(leaf, fi); /* - * If extent we got ends before our range starts, skip - * to next extent + * If the extent we got ends before our current offset, + * skip to the next extent. */ - if (extent_end <= start) { + if (extent_end <= cur_offset) { path->slots[0]++; goto next_slot; } |