[300/622] lustre: dom: mdc_lock_flush() improvement

Commit Message

James Simmons Feb. 27, 2020, 9:12 p.m. UTC

From: Mikhail Pershin <[e-mail]>

There is small improvement in osc_lock_flush() to don't
match other locks for write lock because there are none.

Do the same in mdc_lock_flush().

WC-bug-id: https://jira.whamcloud.com/browse/LU-10894
Lustre-commit: 276221c2a1d2 ("LU-10894 dom: mdc_lock_flush() improvement")
Signed-off-by: Mikhail Pershin <[e-mail]>
Reviewed-on: https://review.whamcloud.com/34738
Reviewed-by: Patrick Farrell <[e-mail]>
Reviewed-by: Andrew Perepechko <[e-mail]>
Reviewed-by: Oleg Drokin <[e-mail]>
Signed-off-by: James Simmons <[e-mail]>
---
 fs/lustre/mdc/mdc_dev.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Patch

diff --git a/fs/lustre/mdc/mdc_dev.c b/fs/lustre/mdc/mdc_dev.c
index 8f0e283..14cece1 100644
--- a/fs/lustre/mdc/mdc_dev.c
+++ b/fs/lustre/mdc/mdc_dev.c
@@ -253,7 +253,9 @@  static int mdc_lock_flush(const struct lu_env *env, struct osc_object *obj,
 			result = 0;
 	}
 
-	rc = mdc_lock_discard_pages(env, obj, start, end, discard);
+	/* Avoid lock matching with CLM_WRITE, there can be no other locks */
+	rc = mdc_lock_discard_pages(env, obj, start, end,
+				    mode == CLM_WRITE || discard);
 	if (result == 0 && rc < 0)
 		result = rc;