From: Bobi Jam <bobijam@whamcloud.com>
Date: Wed, 22 Apr 2020 05:28:54 +0000 (+0800)
Subject: LU-13473 llite: don't check mirror info for page discard
X-Git-Tag: 2.13.55~163
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=d0dd744ed6ae002f34bdade993428b635b23d072;p=fs%2Flustre-release.git

LU-13473 llite: don't check mirror info for page discard

The CIT_MISC is used for locks/pages manipulation, it will not
go with full io procedure, i.e. cl_io_loop() will not be called
for it. So don't check it for plain file since the mirror info
is not initialized/set in this case.

Signed-off-by: Bobi Jam <bobijam@whamcloud.com>
Change-Id: I723d18260629b8f7c470d350d6d899d3bb88018a
Reviewed-on: https://review.whamcloud.com/38307
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Wang Shilong <wshilong@ddn.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
---

diff --git a/lustre/lov/lov_io.c b/lustre/lov/lov_io.c
index 747c72f..ef9e5bb 100644
--- a/lustre/lov/lov_io.c
+++ b/lustre/lov/lov_io.c
@@ -308,8 +308,13 @@ static int lov_io_mirror_init(struct lov_io *lio, struct lov_object *obj,
 	ENTRY;
 
 	if (!lov_is_flr(obj)) {
-		LASSERT(comp->lo_preferred_mirror == 0);
-		lio->lis_mirror_index = comp->lo_preferred_mirror;
+		/* only locks/pages are manipulated for CIT_MISC op, no
+		 * cl_io_loop() will be called, don't check/set mirror info.
+		 */
+		if (io->ci_type != CIT_MISC) {
+			LASSERT(comp->lo_preferred_mirror == 0);
+			lio->lis_mirror_index = comp->lo_preferred_mirror;
+		}
 		io->ci_ndelay = 0;
 		RETURN(0);
 	}