linux-kernel - [PATCH V2 6/6] /proc/pid/numa_vamaps: document in Documentation/filesystems/proc.txt

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Message-Id: <1536783844-4145-7-git-send-email-prakash.sangappa@oracle.com>
Date:   Wed, 12 Sep 2018 13:24:04 -0700
From:   Prakash Sangappa <prakash.sangappa@...cle.com>
To:     linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:     dave.hansen@...el.com, mhocko@...e.com, nao.horiguchi@...il.com,
        akpm@...ux-foundation.org, kirill.shutemov@...ux.intel.com,
        khandual@...ux.vnet.ibm.com, steven.sistare@...cle.com,
        prakash.sangappa@...cle.com
Subject: [PATCH V2 6/6] /proc/pid/numa_vamaps: document in Documentation/filesystems/proc.txt

Add documentation for /proc/<pid>/numa_vamaps in
Documentation/filesystems/proc.txt

Signed-off-by: Prakash Sangappa <prakash.sangappa@...cle.com>
Reviewed-by: Steve Sistare <steven.sistare@...cle.com>
---
 Documentation/filesystems/proc.txt | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index 22b4b00..7095216 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -150,6 +150,9 @@ Table 1-1: Process specific entries in /proc
 		each mapping and flags associated with it
  numa_maps	an extension based on maps, showing the memory locality and
 		binding policy as well as mem usage (in pages) of each mapping.
+ numa_vamaps	Presents information about mapped address ranges to numa node
+		from where the physical memory is allocated.
+
 ..............................................................................
 
 For example, to get the status information of a process, all you have to do is
@@ -571,6 +574,24 @@ Where:
 node locality page counters (N0 == node0, N1 == node1, ...) and the kernel page
 size, in KB, that is backing the mapping up.
 
+The /proc/pid/numa_vamaps shows mapped address ranges to numa node id from
+where the physical pages are allocated. For mapped address ranges not having
+any pages mapped a '-' is shown instead of the node id. Each line in the file
+will show address range to one numa node.
+
+address-range	numa-node-id
+
+00400000-00410000 N1
+00410000-0047f000 N0
+0047f000-00480000 N2
+00480000-00481000 -
+00481000-004a0000 N0
+004a0000-004a2000 -
+004a2000-004aa000 N2
+004aa000-004ad000 N0
+004ad000-004ae000 -
+..
+
 1.2 Kernel data
 ---------------
 
-- 
2.7.4