Re: [PATCH] mm/page_alloc: remove the static for local variable node_order
From: Matthew Wilcox <willy@infradead.org>
Date: 2021-01-05 01:32:08
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On Mon, Jan 04, 2021 at 03:23:57PM -0800, Andrew Morton wrote:
On Wed, 30 Dec 2020 12:42:33 +0000 Matthew Wilcox [off-list ref] wrote:quoted
On Wed, Dec 30, 2020 at 07:40:14PM +0800, Hui Su wrote:quoted
local variable node_order do not need the static here.It bloody well does. It can be up to 2^10 entries on x86 (and larger on others) That's 4kB which you've now moved onto the stack.That being said, could we kmalloc the scratch area in __build_all_zonelists()? And maybe remove that static spinlock? (what blocks node and cpu hotplug in there??)
if we don't have the zonelists built yet, can slab possibly be operational?