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| author | Darrick J. Wong <darrick.wong@oracle.com> | 2016-10-03 09:11:43 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2016-10-05 16:26:26 -0700 |
| commit | f7ca35227253dc8244fd908140b06010e67a31e5 (patch) | |
| tree | 2e2731cafe2a8e8f6679d2a58eef031c1a84ffba /fs/xfs/xfs_inode.h | |
| parent | 98cc2db5b8b2c9f38aebf54a7b03657406b6de26 (diff) | |
| download | linux-f7ca35227253dc8244fd908140b06010e67a31e5.tar.gz linux-f7ca35227253dc8244fd908140b06010e67a31e5.tar.xz | |
xfs: create a separate cow extent size hint for the allocator
Create a per-inode extent size allocator hint for copy-on-write. This
hint is separate from the existing extent size hint so that CoW can
take advantage of the fragmentation-reducing properties of extent size
hints without disabling delalloc for regular writes.
The extent size hint that's fed to the allocator during a copy on
write operation is the greater of the cowextsize and regular extsize
hint.
During reflink, if we're sharing the entire source file to the entire
destination file and the destination file doesn't already have a
cowextsize hint, propagate the source file's cowextsize hint to the
destination file.
Furthermore, zero the bulkstat buffer prior to setting the fields
so that we don't copy kernel memory contents into userspace.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs/xfs/xfs_inode.h')
| -rw-r--r-- | fs/xfs/xfs_inode.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index ff6fc03c0092..6d63dc031127 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -426,6 +426,7 @@ int xfs_iflush(struct xfs_inode *, struct xfs_buf **); void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint); xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip); +xfs_extlen_t xfs_get_cowextsz_hint(struct xfs_inode *ip); int xfs_dir_ialloc(struct xfs_trans **, struct xfs_inode *, umode_t, xfs_nlink_t, xfs_dev_t, prid_t, int, |