From: Huang Ying <ying.huang@intel.com>
To: Peter Zijlstra <peterz@infradead.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 -V8 2/3] NOT kernel/man2/set_mempolicy.2: Add mode flag MPOL_F_NUMA_BALANCING
Date: Wed, 6 Jan 2021 14:57:53 +0800 [thread overview]
Message-ID: <20210106065754.17955-3-ying.huang@intel.com> (raw)
In-Reply-To: <20210106065754.17955-1-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
next prev parent reply other threads:[~2021-01-06 6:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-06 6:57 [PATCH -V8 0/3] numa balancing: Migrate on fault among multiple bound nodes Huang Ying
2021-01-06 6:57 ` [PATCH -V8 1/3] " Huang Ying
2021-01-12 6:13 ` Huang, Ying
2021-01-06 6:57 ` Huang Ying [this message]
2021-01-06 6:57 ` [PATCH -V8 3/3] NOT kernel/numactl: Support to enable Linux kernel NUMA balancing Huang Ying
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