[240/622] lnet: lnd: increase CQ entries

Commit Message

James Simmons Feb. 27, 2020, 9:11 p.m. UTC

From: Amir Shehata <[e-mail]>

Several sites have reported RDMA timeouts. Most of the timeouts
are occurring for transmits on the active_tx queue. Transmits are
placed on the active_tx queue until a completion is received. If
there isn't enough CQ entries available, it's possible for a
completions events to be delayed, causing these timeouts.

WC-bug-id: https://jira.whamcloud.com/browse/LU-12065
Lustre-commit: bf3fc7f1a7bf ("LU-12065 lnd: increase CQ entries")
Signed-off-by: Amir Shehata <[e-mail]>
Reviewed-by: Sonia Sharma <[e-mail]>
Reviewed-by: James Simmons <[e-mail]>
Reviewed-on: https://review.whamcloud.com/34473
Reviewed-by: Chris Horn <[e-mail]>
Reviewed-by: Andreas Dilger <[e-mail]>
Signed-off-by: James Simmons <[e-mail]>
---
 net/lnet/klnds/o2iblnd/o2iblnd.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

Patch

diff --git a/net/lnet/klnds/o2iblnd/o2iblnd.h b/net/lnet/klnds/o2iblnd/o2iblnd.h
index 999b58d..44f1d84 100644
--- a/net/lnet/klnds/o2iblnd/o2iblnd.h
+++ b/net/lnet/klnds/o2iblnd/o2iblnd.h
@@ -136,8 +136,7 @@  struct kib_tunables {
 /* WRs and CQEs (per connection) */
 #define IBLND_RECV_WRS(c)	IBLND_RX_MSGS(c)
 
-#define IBLND_CQ_ENTRIES(c)	\
-	(IBLND_RECV_WRS(c) + 2 * c->ibc_queue_depth)
+#define IBLND_CQ_ENTRIES(c)	(IBLND_RECV_WRS(c) + kiblnd_send_wrs(c))
 
 struct kib_hca_dev;