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From: Huang Ying <ying.huang@intel.com>
To: Andrew Morton <akpm@linux-foundation.org>, Mel Gorman <mgorman@suse.de>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Huang Ying <ying.huang@intel.com>,
	"Alejandro Colomar" <alx.mailinglists@gmail.com>
Subject: [PATCH -V9 2/3] NOT kernel/man2/set_mempolicy.2: Add mode flag MPOL_F_NUMA_BALANCING
Date: Wed, 20 Jan 2021 14:12:34 +0800	[thread overview]
Message-ID: <20210120061235.148637-3-ying.huang@intel.com> (raw)
In-Reply-To: <20210120061235.148637-1-ying.huang@intel.com>

Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Cc: "Alejandro Colomar" <alx.mailinglists@gmail.com>
---
 man2/set_mempolicy.2 | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/man2/set_mempolicy.2 b/man2/set_mempolicy.2
index 68011eecb..fa64a1820 100644
--- a/man2/set_mempolicy.2
+++ b/man2/set_mempolicy.2
@@ -113,6 +113,22 @@ A nonempty
 .I nodemask
 specifies node IDs that are relative to the set of
 node IDs allowed by the process's current cpuset.
+.TP
+.BR MPOL_F_NUMA_BALANCING " (since Linux 5.12)"
+When
+.I mode
+is
+.BR MPOL_BIND ,
+enable the kernel NUMA balancing for the task if it is supported by
+the kernel.
+If the flag isn't supported by the kernel, or is used with
+.I mode
+other than
+.BR MPOL_BIND ,
+return \-1 and
+.I errno
+is set to
+.BR EINVAL .
 .PP
 .I nodemask
 points to a bit mask of node IDs that contains up to
@@ -293,6 +309,12 @@ argument specified both
 .B MPOL_F_STATIC_NODES
 and
 .BR MPOL_F_RELATIVE_NODES .
+Or, the
+.B MPOL_F_NUMA_BALANCING
+isn't supported by the kernel, or is used with
+.I mode
+other than
+.BR MPOL_BIND .
 .TP
 .B ENOMEM
 Insufficient kernel memory was available.
-- 
2.29.2


  parent reply	other threads:[~2021-01-20  6:18 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-20  6:12 [PATCH -V9 0/3] numa balancing: Migrate on fault among multiple bound nodes Huang Ying
2021-01-20  6:12 ` [PATCH -V9 1/3] " Huang Ying
2021-01-20  6:12 ` Huang Ying [this message]
2021-01-21 20:39   ` [PATCH -V9 2/3] NOT kernel/man2/set_mempolicy.2: Add mode flag MPOL_F_NUMA_BALANCING Alejandro Colomar (man-pages)
2021-01-22  0:58     ` Huang, Ying
2021-01-22  0:58       ` Huang, Ying
2021-01-20  6:12 ` [PATCH -V9 3/3] NOT kernel/numactl: Support to enable Linux kernel NUMA balancing Huang Ying

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