device-mapper-multipath/0008-multipath-tools-make-EMC-Invista-config-work-with-al.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Xose Vazquez Perez <xose.vazquez@gmail.com>
Date: Tue, 28 Sep 2021 19:31:21 +0200
Subject: [PATCH] multipath-tools: make EMC/Invista config work with alua and
multibus
Optimal Path Management (OPM) was introduced with VPLEX 5.5 to improve VPLEX
performance. OPM uses the ALUA mechanism to spread the I/O load across VPLEX directors
while gaining cache locality, pag #187:
https://www.delltechnologies.com/en-us/collaterals/unauth/technical-guides-support-information/products/storage-2/docu5128.pdf
Cc: Martin Wilck <mwilck@suse.com>
Cc: Benjamin Marzinski <bmarzins@redhat.com>
Cc: Christophe Varoqui <christophe.varoqui@opensvc.com>
Cc: DM-DEVEL ML <dm-devel@redhat.com>
Signed-off-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
---
libmultipath/hwtable.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libmultipath/hwtable.c b/libmultipath/hwtable.c
index 7095aaf1..4e8b52ff 100644
--- a/libmultipath/hwtable.c
+++ b/libmultipath/hwtable.c
@@ -350,8 +350,9 @@ static struct hwentry default_hw[] = {
.vendor = "EMC",
.product = "Invista",
.bl_product = "LUNZ",
- .pgpolicy = MULTIBUS,
+ .pgpolicy = GROUP_BY_PRIO,
.no_path_retry = 5,
+ .pgfailback = -FAILBACK_IMMEDIATE,
},
{
/* XtremIO */