]> git.baikalelectronics.ru Git - kernel.git/commit
mm, memory_hotplug: simplify empty node mask handling in new_node_page
authorMichal Hocko <mhocko@suse.com>
Mon, 10 Jul 2017 22:48:41 +0000 (15:48 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Mon, 10 Jul 2017 23:32:31 +0000 (16:32 -0700)
commitf831d90f97640c67816722789e2e9b6c1d070c4d
treed83c538b6f8420feb1ce51771da7da13d4cf3a74
parent778284c229dd3a0c885d08952a2dece2c65f4f6b
mm, memory_hotplug: simplify empty node mask handling in new_node_page

new_node_page tries to allocate the target page on a different NUMA node
than the source page.  This makes sense in most cases during the hotplug
because we are likely to offline the whole numa node.  But there are
cases where there are no other nodes to fallback (e.g.  when offlining
parts of the only existing node) and we have to fallback to allocating
from the source node.  The current code does that but it can be
simplified by checking the nmask and updating it before we even try to
allocate rather than special casing it.

This patch shouldn't introduce any functional change.

Link: http://lkml.kernel.org/r/20170608074553.22152-2-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Xishi Qiu <qiuxishi@huawei.com>
Cc: zhong jiang <zhongjiang@huawei.com>
Cc: Joonsoo Kim <js1304@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/memory_hotplug.c