[Devel] [PATCH] ploop: force journal commit after dio_post_submit

[Dmitry Monakhov]

Once we converted extent to initialized it can be part of uncompleted
journal transaction, so we have to force transaction commit at some point.
The easiest way to do it is to perform unconditional fsync.
https://jira.sw.ru/browse/PSBM-45326

TODO: This case and others can be optimized by deferring fsync.But this is
      subject of another patch.

Signed-off-by: Dmitry Monakhov <dmonakhov at openvz.org>
---
 drivers/block/ploop/io_direct.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/block/ploop/io_direct.c b/drivers/block/ploop/io_direct.c
index 8032999..5a2e12a 100644
--- a/drivers/block/ploop/io_direct.c
+++ b/drivers/block/ploop/io_direct.c
@@ -523,6 +523,8 @@ dio_post_submit(struct ploop_io *io, struct ploop_request * preq)
 	err = io->files.file->f_op->fallocate(io->files.file,
 					      FALLOC_FL_CONVERT_UNWRITTEN,
 					      (loff_t)sec << 9, clu_siz);
+	if (!err)
+		err = io->files.file->f_op->FOP_FSYNC(io->files.file, 0);
 	file_end_write(io->files.file);
 	if (err) {
 		PLOOP_REQ_SET_ERROR(preq, err);
-- 
1.8.3.1