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a49058fab2
Sicne the jbd/jbd2 superblock is not released until the file system is unmounted, allocate the buffer cache from the non-moveable area to allow page migration and CMA allocations to more easily succeed. Signed-off-by: Gioh Kim <gioh.kim@lge.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jan Kara <jack@suse.cz>