diff options
| author | Michal Hocko <mhocko@suse.cz> | 2015-07-05 12:33:44 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-08-03 09:29:43 -0700 |
| commit | 45add18aeda9dbc0a2346c6c7479835a0a01f0df (patch) | |
| tree | d25275e7e2273fef4298a49b1c8a8ed7f1efc36c /fs | |
| parent | 3cf4f7339b7902c6b7ac10035fd196b7889dcf4d (diff) | |
ext4: replace open coded nofail allocation in ext4_free_blocks()
commit 7444a072c387a93ebee7066e8aee776954ab0e41 upstream.
ext4_free_blocks is looping around the allocation request and mimics
__GFP_NOFAIL behavior without any allocation fallback strategy. Let's
remove the open coded loop and replace it with __GFP_NOFAIL. Without the
flag the allocator has no way to find out never-fail requirement and
cannot help in any way.
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/mballoc.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index df5050f9080b..61ee01603940 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4764,18 +4764,12 @@ do_more: /* * blocks being freed are metadata. these blocks shouldn't * be used until this transaction is committed + * + * We use __GFP_NOFAIL because ext4_free_blocks() is not allowed + * to fail. */ - retry: - new_entry = kmem_cache_alloc(ext4_free_data_cachep, GFP_NOFS); - if (!new_entry) { - /* - * We use a retry loop because - * ext4_free_blocks() is not allowed to fail. - */ - cond_resched(); - congestion_wait(BLK_RW_ASYNC, HZ/50); - goto retry; - } + new_entry = kmem_cache_alloc(ext4_free_data_cachep, + GFP_NOFS|__GFP_NOFAIL); new_entry->efd_start_cluster = bit; new_entry->efd_group = block_group; new_entry->efd_count = count_clusters; |