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Merge branch 'allocator-fixes' into for-linus-4.4

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Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Chris Mason 2015-10-21 19:00:38 -07:00
commit a9e6d15356
14 changed files with 458 additions and 122 deletions
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9
fs/btrfs/inode.c
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@ -9745,6 +9745,7 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode,
u64 cur_offset = start;
u64 i_size;
u64 cur_bytes;
u64 last_alloc = (u64)-1;
int ret = 0;
bool own_trans = true;
@ -9761,6 +9762,13 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode,
cur_bytes = min(num_bytes, 256ULL * 1024 * 1024);
cur_bytes = max(cur_bytes, min_size);
/*
* If we are severely fragmented we could end up with really
* small allocations, so if the allocator is returning small
* chunks lets make its job easier by only searching for those
* sized chunks.
*/
cur_bytes = min(cur_bytes, last_alloc);
ret = btrfs_reserve_extent(root, cur_bytes, min_size, 0,
*alloc_hint, &ins, 1, 0);
if (ret) {
@ -9769,6 +9777,7 @@ static int __btrfs_prealloc_file_range(struct inode *inode, int mode,
break;
}
last_alloc = ins.offset;
ret = insert_reserved_file_extent(trans, inode,
cur_offset, ins.objectid,
ins.offset, ins.offset,