linux-kernel - [PATCH v4 4/4] mm/memory_hotplug: Drop node_online check in unregister_mem_sect_under

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20180817090017.17610-5-osalvador@techadventures.net>
Date:   Fri, 17 Aug 2018 11:00:17 +0200
From:   Oscar Salvador <osalvador@...hadventures.net>
To:     akpm@...ux-foundation.org
Cc:     mhocko@...e.com, vbabka@...e.cz, dan.j.williams@...el.com,
        yasu.isimatu@...il.com, jonathan.cameron@...wei.com,
        david@...hat.com, Pavel.Tatashin@...rosoft.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, Oscar Salvador <osalvador@...e.de>
Subject: [PATCH v4 4/4] mm/memory_hotplug: Drop node_online check in unregister_mem_sect_under_nodes

From: Oscar Salvador <osalvador@...e.de>

We are getting the nid from the pages that are not yet removed,
but a node can only be offline when its memory/cpu's have been removed.
Therefore, we know that the node is still online.

Signed-off-by: Oscar Salvador <osalvador@...e.de>
Reviewed-by: David Hildenbrand <david@...hat.com>
Reviewed-by: Pavel Tatashin <pavel.tatashin@...rosoft.com>
---
 drivers/base/node.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/base/node.c b/drivers/base/node.c
index 6b8c9b4537c9..01e9190be010 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -464,8 +464,6 @@ void unregister_mem_sect_under_nodes(struct memory_block *mem_blk,
 
 		if (nid < 0)
 			continue;
-		if (!node_online(nid))
-			continue;
 		if (node_test_and_set(nid, unlinked_nodes))
 			continue;
 
-- 
2.13.6