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| author |   Liu Bo <bo.li.liu@oracle.com> | 2018-01-05 12:51:17 -0700 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2018-01-22 16:08:22 +0100 |
| commit | 5f4791f4a6479cdeb8caae1a3e5895c8a6e99c09 (patch) | |
| tree | ed7fa36a5aa0360dcddea7882eba8f6e52038f37 /fs/btrfs/extent_map.c | |
| parent | Btrfs: add WARN_ONCE to detect unexpected error from merge_extent_mapping (diff) | |
| download | linux-dev-5f4791f4a6479cdeb8caae1a3e5895c8a6e99c09.tar.xz linux-dev-5f4791f4a6479cdeb8caae1a3e5895c8a6e99c09.zip | |
Btrfs: noinline merge_extent_mapping
In order to debug subtle bugs around merge_extent_mapping(), perf probe
can be used to check the arguments, but sometimes merge_extent_mapping()
got inlined by compiler and couldn't be probed.
This is adding noinline attribute to merge_extent_mapping().
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/extent_map.c')
| -rw-r--r-- | fs/btrfs/extent_map.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index 914662428dbd..d3bd02105d1c 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -480,10 +480,10 @@ static struct extent_map *prev_extent_map(struct extent_map *em) * and an extent that you want to insert, deal with overlap and insert * the best fitted new extent into the tree. */ -static int merge_extent_mapping(struct extent_map_tree *em_tree, - struct extent_map *existing, - struct extent_map *em, - u64 map_start) +static noinline int merge_extent_mapping(struct extent_map_tree *em_tree, + struct extent_map *existing, + struct extent_map *em, + u64 map_start) { struct extent_map *prev; struct extent_map *next; |