device-mapper-multipath/0001-multipath-tools-add-info-about-IO-affinity-path-sele.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Xose Vazquez Perez <xose.vazquez@gmail.com>
Date: Wed, 8 Sep 2021 22:33:54 +0200
Subject: [PATCH] multipath-tools: add info about IO affinity path selector to
 manpage

Added in 5.11: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4d2e82b2300b03f66b3ca8417590c86e661fab1

Cc: Mike Christie <michael.christie@oracle.com>
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>
---
 multipath/multipath.conf.5 | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/multipath/multipath.conf.5 b/multipath/multipath.conf.5
index d6b8c7f6..42a15ffd 100644
--- a/multipath/multipath.conf.5
+++ b/multipath/multipath.conf.5
@@ -6,7 +6,7 @@
 .\"
 .\" ----------------------------------------------------------------------------
 .
-.TH MULTIPATH.CONF 5 2018-05-21 Linux
+.TH MULTIPATH.CONF 5 2021-09-08 Linux
 .
 .
 .\" ----------------------------------------------------------------------------
@@ -210,6 +210,10 @@ of outstanding I/O to the path and its relative throughput.
 estimation of future service time based on the history of previous I/O submitted
 to each path.
 .TP
+.I "io-affinity 0"
+(Since 5.11 kernel) Choose the path for the next bunch of I/O based on a CPU to
+path mapping the user passes in and what CPU we are executing on.
+.TP
 The default is: \fBservice-time 0\fR
 .RE
 .