[PATCH 37/47] staging/lustre/llite: Do not rate limit dirty page discard warning

[Oleg Drokin]

From: Ryan Haasken <haasken at cray.com>

Messages which are printed by ll_dirty_page_discard_warn() should not
be rate limited.  If they are rate limited, some files which may be
corrupted on client eviction will not be reported to the user.

This patch changes the CWARN to a CDEBUG to disable console message
rate limiting for this message.  The dirty page discard warnings are
already limited on a per-file basis by the function vvp_vmpage_error
which calls ll_dirty_page_discard_warn only if the ccc_object's
cob_discard_page_warned == 0.

Signed-off-by: Ryan Haasken <haasken at cray.com>
Reviewed-on: http://review.whamcloud.com/9752
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-4799
Reviewed-by: Cory Spitz <spitzcor at cray.com>
Reviewed-by: Ann Koehler <amk at cray.com>
Reviewed-by: Chris Horn <hornc at cray.com>
Signed-off-by: Oleg Drokin <oleg.drokin at intel.com>
---
 drivers/staging/lustre/lustre/llite/llite_lib.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/lustre/lustre/llite/llite_lib.c b/drivers/staging/lustre/lustre/llite/llite_lib.c
index 34df5d9..dbb1413 100644
--- a/drivers/staging/lustre/lustre/llite/llite_lib.c
+++ b/drivers/staging/lustre/lustre/llite/llite_lib.c
@@ -2456,11 +2456,12 @@ void ll_dirty_page_discard_warn(struct page *page, int ioret)
 			path = ll_d_path(dentry, buf, PAGE_SIZE);
 	}
 
-	CWARN("%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
-	      "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
-	      s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
-	      PFID(&obj->cob_header.coh_lu.loh_fid),
-	      (path && !IS_ERR(path)) ? path : "", ioret);
+	CDEBUG(D_WARNING,
+	       "%s: dirty page discard: %s/fid: "DFID"/%s may get corrupted "
+	       "(rc %d)\n", ll_get_fsname(page->mapping->host->i_sb, NULL, 0),
+	       s2lsi(page->mapping->host->i_sb)->lsi_lmd->lmd_dev,
+	       PFID(&obj->cob_header.coh_lu.loh_fid),
+	       (path && !IS_ERR(path)) ? path : "", ioret);
 
 	if (dentry != NULL)
 		dput(dentry);
-- 
1.8.5.3