tree 333371098928c834b0bda0c2fe5bfd591a3806ef
parent e5472147e1c0712d95d973acfdbd862957c77add
author Jan Kara <jack@suse.cz> 1266349032 +0100
committer Jan Kara <jack@suse.cz> 1267744826 +0100

jbd: Delay discarding buffers in journal_unmap_buffer

Delay discarding buffers in journal_unmap_buffer until
we know that "add to orphan" operation has definitely been
committed, otherwise the log space of committing transation
may be freed and reused before truncate get committed, updates
may get lost if crash happens.

This patch is a backport of JBD2 fix by dingdinghua <dingdinghua@nrchpc.ac.cn>.

Signed-off-by: Jan Kara <jack@suse.cz>