tree 182e8599c13bea5b9e01ca4cca2ed5acc2ab5b0a
parent eb0aa4b80784b8551bd5be577024e067bc83ef94
author Chao Yu <yuchao0@huawei.com> 1476196295 +0800
committer Jaegeuk Kim <jaegeuk@kernel.org> 1479931862 -0800

f2fs: don't interrupt free nids building during nid allocation

Let build_free_nids support sync/async methods, in allocation flow of nids,
we use synchronuous method, so that we can avoid looping in alloc_nid when
free memory is low; in unblock_operations and f2fs_balance_fs_bg we use
asynchronuous method in where low memory condition can interrupt us.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>