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| author | Allison Henderson <achender@linux.vnet.ibm.com> | 2011-05-25 07:41:26 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2011-05-25 07:41:26 -0400 |
| commit | 55f020db66ce187fb8c8e4002a94b0eb714da450 (patch) | |
| tree | e98214511542f57fa93074be12e27c4819520333 /fs/ext4/mballoc.c | |
| parent | ae81230686282af745ebb7a74c0332349cb9131a (diff) | |
| download | kernel_samsung_smdk4412-55f020db66ce187fb8c8e4002a94b0eb714da450.zip kernel_samsung_smdk4412-55f020db66ce187fb8c8e4002a94b0eb714da450.tar.gz kernel_samsung_smdk4412-55f020db66ce187fb8c8e4002a94b0eb714da450.tar.bz2 | |
ext4: add flag to ext4_has_free_blocks
This patch adds an allocation request flag to the ext4_has_free_blocks
function which enables the use of reserved blocks. This will allow a
punch hole to proceed even if the disk is full. Punching a hole may
require additional blocks to first split the extents.
Because ext4_has_free_blocks is a low level function, the flag needs
to be passed down through several functions listed below:
ext4_ext_insert_extent
ext4_ext_create_new_leaf
ext4_ext_grow_indepth
ext4_ext_split
ext4_ext_new_meta_block
ext4_mb_new_blocks
ext4_claim_free_blocks
ext4_has_free_blocks
[ext4 punch hole patch series 1/5 v7]
Signed-off-by: Allison Henderson <achender@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Mingming Cao <cmm@us.ibm.com>
Diffstat (limited to 'fs/ext4/mballoc.c')
| -rw-r--r-- | fs/ext4/mballoc.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 396b01f..859f2ae 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4236,7 +4236,9 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle, * there is enough free blocks to do block allocation * and verify allocation doesn't exceed the quota limits. */ - while (ar->len && ext4_claim_free_blocks(sbi, ar->len)) { + while (ar->len && + ext4_claim_free_blocks(sbi, ar->len, ar->flags)) { + /* let others to free the space */ yield(); ar->len = ar->len >> 1; @@ -4246,9 +4248,15 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle, return 0; } reserv_blks = ar->len; - while (ar->len && dquot_alloc_block(ar->inode, ar->len)) { - ar->flags |= EXT4_MB_HINT_NOPREALLOC; - ar->len--; + if (ar->flags & EXT4_MB_USE_ROOT_BLOCKS) { + dquot_alloc_block_nofail(ar->inode, ar->len); + } else { + while (ar->len && + dquot_alloc_block(ar->inode, ar->len)) { + + ar->flags |= EXT4_MB_HINT_NOPREALLOC; + ar->len--; + } } inquota = ar->len; if (ar->len == 0) { |