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| author | Josef Bacik <josef@redhat.com> | 2011-05-11 15:26:06 -0400 |
|---|---|---|
| committer | Josef Bacik <josef@redhat.com> | 2011-05-23 13:03:12 -0400 |
| commit | d82a6f1d7e8b61ed5996334d0db66651bb43641d (patch) | |
| tree | 5738ec75f7679bdc1b97aecbc5cad3464cc65541 /fs/btrfs/ctree.h | |
| parent | 7e2355ba1a11649f0b212a29fdb9f47476f1248e (diff) | |
| download | linux-d82a6f1d7e8b61ed5996334d0db66651bb43641d.tar.gz linux-d82a6f1d7e8b61ed5996334d0db66651bb43641d.tar.bz2 linux-d82a6f1d7e8b61ed5996334d0db66651bb43641d.zip | |
Btrfs: kill BTRFS_I(inode)->block_group
Originally this was going to be used as a way to give hints to the allocator,
but frankly we can get much better hints elsewhere and it's not even used at all
for anything usefull. In addition to be completely useless, when we initialize
an inode we try and find a freeish block group to set as the inodes block group,
and with a completely full 40gb fs this takes _forever_, so I imagine with say
1tb fs this is just unbearable. So just axe the thing altoghether, we don't
need it and it saves us 8 bytes in the inode and saves us 500 microseconds per
inode lookup in my testcase. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index f31aed7fedd9..0f8c489bcc02 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2512,8 +2512,7 @@ int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end, int btrfs_writepages(struct address_space *mapping, struct writeback_control *wbc); int btrfs_create_subvol_root(struct btrfs_trans_handle *trans, - struct btrfs_root *new_root, - u64 new_dirid, u64 alloc_hint); + struct btrfs_root *new_root, u64 new_dirid); int btrfs_merge_bio_hook(struct page *page, unsigned long offset, size_t size, struct bio *bio, unsigned long bio_flags); |