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ext4: Use inode preallocation with -o noextents

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When mballoc is enabled, block allocation for old block-based
files are allocated using mballoc allocator instead of old
block-based allocator. The old ext3 block reservation is turned
off when mballoc is turned on.

However, the in-core preallocation is not enabled for block-based/
non-extent based file block allocation. This result in performance
regression, as now we don't have "reservation" ore in-core preallocation
to prevent interleaved fragmentation in multiple writes workload.

This patch fix this by enable per inode in-core preallocation
for non extent files when mballoc is used.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Aneesh Kumar K.V
2008-07-11 19:27:31 -04:00
committed by Theodore Ts'o
parent 6afd670713
commit 7061eba75c
5 changed files with 96 additions and 25 deletions
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2
fs/ext4/xattr.c
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@@ -810,7 +810,7 @@ inserted:
/* We need to allocate a new block */
ext4_fsblk_t goal = ext4_group_first_block_no(sb,
EXT4_I(inode)->i_block_group);
ext4_fsblk_t block = ext4_new_block(handle, inode,
ext4_fsblk_t block = ext4_new_meta_block(handle, inode,
goal, &error);
if (error)
goto cleanup;