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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Xose Vazquez Perez <xose.vazquez@gmail.com>
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Date: Wed, 8 Sep 2021 22:33:54 +0200
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Subject: [PATCH] multipath-tools: add info about IO affinity path selector to
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manpage
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Added in 5.11: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4d2e82b2300b03f66b3ca8417590c86e661fab1
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Cc: Mike Christie <michael.christie@oracle.com>
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Cc: Martin Wilck <mwilck@suse.com>
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Cc: Benjamin Marzinski <bmarzins@redhat.com>
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Cc: Christophe Varoqui <christophe.varoqui@opensvc.com>
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Cc: DM-DEVEL ML <dm-devel@redhat.com>
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Signed-off-by: Xose Vazquez Perez <xose.vazquez@gmail.com>
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Reviewed-by: Martin Wilck <mwilck@suse.com>
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Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
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---
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multipath/multipath.conf.5 | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/multipath/multipath.conf.5 b/multipath/multipath.conf.5
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index d6b8c7f6..42a15ffd 100644
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--- a/multipath/multipath.conf.5
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+++ b/multipath/multipath.conf.5
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@@ -6,7 +6,7 @@
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.\"
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.\" ----------------------------------------------------------------------------
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.
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-.TH MULTIPATH.CONF 5 2018-05-21 Linux
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+.TH MULTIPATH.CONF 5 2021-09-08 Linux
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.
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.
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.\" ----------------------------------------------------------------------------
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@@ -210,6 +210,10 @@ of outstanding I/O to the path and its relative throughput.
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estimation of future service time based on the history of previous I/O submitted
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to each path.
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.TP
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+.I "io-affinity 0"
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+(Since 5.11 kernel) Choose the path for the next bunch of I/O based on a CPU to
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+path mapping the user passes in and what CPU we are executing on.
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+.TP
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The default is: \fBservice-time 0\fR
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.RE
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.
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