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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-18 10:28:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-05-18 10:28:45 -0700 |
| commit | e34df3344d7b6f284e958147d7225faa340a1f39 (patch) | |
| tree | cd721c5f49f27527dc7784497903c4be0ac842b7 /fs | |
| parent | 442c9ac989d71599ebc39f4ea4d5b0e64996904b (diff) | |
| parent | 9f5418010940236b2c39ea53b99055ca26ff1279 (diff) | |
Merge branch 'work.lookups' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull parallel lookup fixups from Al Viro:
"Fix for xfs parallel readdir (turns out the cxfs exposure was not
enough to catch all problems), and a reversion of btrfs back to
->iterate() until the fs/btrfs/delayed-inode.c gets fixed"
* 'work.lookups' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
xfs: concurrent readdir hangs on data buffer locks
Revert "btrfs: switch to ->iterate_shared()"
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/inode.c | 2 | ||||
| -rw-r--r-- | fs/xfs/xfs_dir2_readdir.c | 23 |
2 files changed, 15 insertions, 10 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 6e1ae72b8949..6b7fe291a174 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -10181,7 +10181,7 @@ static const struct inode_operations btrfs_dir_ro_inode_operations = { static const struct file_operations btrfs_dir_file_operations = { .llseek = generic_file_llseek, .read = generic_read_dir, - .iterate_shared = btrfs_real_readdir, + .iterate = btrfs_real_readdir, .unlocked_ioctl = btrfs_ioctl, #ifdef CONFIG_COMPAT .compat_ioctl = btrfs_ioctl, diff --git a/fs/xfs/xfs_dir2_readdir.c b/fs/xfs/xfs_dir2_readdir.c index 93b3ab0c5435..f44f79996978 100644 --- a/fs/xfs/xfs_dir2_readdir.c +++ b/fs/xfs/xfs_dir2_readdir.c @@ -273,10 +273,11 @@ xfs_dir2_leaf_readbuf( size_t bufsize, struct xfs_dir2_leaf_map_info *mip, xfs_dir2_off_t *curoff, - struct xfs_buf **bpp) + struct xfs_buf **bpp, + bool trim_map) { struct xfs_inode *dp = args->dp; - struct xfs_buf *bp = *bpp; + struct xfs_buf *bp = NULL; struct xfs_bmbt_irec *map = mip->map; struct blk_plug plug; int error = 0; @@ -286,13 +287,10 @@ xfs_dir2_leaf_readbuf( struct xfs_da_geometry *geo = args->geo; /* - * If we have a buffer, we need to release it and - * take it out of the mapping. + * If the caller just finished processing a buffer, it will tell us + * we need to trim that block out of the mapping now it is done. */ - - if (bp) { - xfs_trans_brelse(NULL, bp); - bp = NULL; + if (trim_map) { mip->map_blocks -= geo->fsbcount; /* * Loop to get rid of the extents for the @@ -533,10 +531,17 @@ xfs_dir2_leaf_getdents( */ if (!bp || ptr >= (char *)bp->b_addr + geo->blksize) { int lock_mode; + bool trim_map = false; + + if (bp) { + xfs_trans_brelse(NULL, bp); + bp = NULL; + trim_map = true; + } lock_mode = xfs_ilock_data_map_shared(dp); error = xfs_dir2_leaf_readbuf(args, bufsize, map_info, - &curoff, &bp); + &curoff, &bp, trim_map); xfs_iunlock(dp, lock_mode); if (error || !map_info->map_valid) break; |