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ext4: don't use EXT4_FREE_BLOCKS_FORGET unnecessarily 

Commit 18888cf0883c: "ext4: speed up truncate/unlink by not using
bforget() unless needed" removed the use of EXT4_FREE_BLOCKS_FORGET in
the most important codepath for file systems using extents, but a
similar optimization also can be done for file systems using indirect
blocks, and for the two special cases in the ext4 extents code.

Cc: Andrey Sidorov <qrxd43@motorola.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2013-06-12 11:48:29 -04:00
Родитель 2ed5724d5a
Коммит 981250ca89
2 изменённых файлов: 16 добавлений и 16 удалений
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26
fs/ext4/extents.c
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@ -2355,6 +2355,15 @@ int ext4_ext_index_trans_blocks(struct inode *inode, int extents)
return index;
}
static inline int get_default_free_blocks_flags(struct inode *inode)
{
if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
return EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET;
else if (ext4_should_journal_data(inode))
return EXT4_FREE_BLOCKS_FORGET;
return 0;
}
static int ext4_remove_blocks(handle_t *handle, struct inode *inode,
struct ext4_extent *ex,
long long *partial_cluster,
@ -2363,12 +2372,7 @@ static int ext4_remove_blocks(handle_t *handle, struct inode *inode,
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
unsigned short ee_len = ext4_ext_get_actual_len(ex);
ext4_fsblk_t pblk;
int flags = 0;
if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
flags |= EXT4_FREE_BLOCKS_METADATA | EXT4_FREE_BLOCKS_FORGET;
else if (ext4_should_journal_data(inode))
flags |= EXT4_FREE_BLOCKS_FORGET;
int flags = get_default_free_blocks_flags(inode);
/*
* For bigalloc file systems, we never free a partial cluster
@ -2635,10 +2639,7 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
if (*partial_cluster > 0 &&
(EXT4_B2C(sbi, ext4_ext_pblock(ex) + ex_ee_len - 1) !=
*partial_cluster)) {
int flags = EXT4_FREE_BLOCKS_FORGET;
if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
flags |= EXT4_FREE_BLOCKS_METADATA;
int flags = get_default_free_blocks_flags(inode);
ext4_free_blocks(handle, inode, NULL,
EXT4_C2B(sbi, *partial_cluster),
@ -2869,10 +2870,7 @@ again:
* even the first extent, then we should free the blocks in the partial
* cluster as well. */
if (partial_cluster > 0 && path->p_hdr->eh_entries == 0) {
int flags = EXT4_FREE_BLOCKS_FORGET;
if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
flags |= EXT4_FREE_BLOCKS_METADATA;
int flags = get_default_free_blocks_flags(inode);
ext4_free_blocks(handle, inode, NULL,
EXT4_C2B(EXT4_SB(sb), partial_cluster),

6
fs/ext4/indirect.c
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@ -926,11 +926,13 @@ static int ext4_clear_blocks(handle_t *handle, struct inode *inode,
__le32 *last)
{
__le32 *p;
int flags = EXT4_FREE_BLOCKS_FORGET | EXT4_FREE_BLOCKS_VALIDATED;
int flags = EXT4_FREE_BLOCKS_VALIDATED;
int err;
if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))
flags |= EXT4_FREE_BLOCKS_METADATA;
flags |= EXT4_FREE_BLOCKS_FORGET | EXT4_FREE_BLOCKS_METADATA;
else if (ext4_should_journal_data(inode))
flags |= EXT4_FREE_BLOCKS_FORGET;
if (!ext4_data_block_valid(EXT4_SB(inode->i_sb), block_to_free,
count)) {