tree 380248938561c53ff174ffba72f22cbc3e8a5438
parent fa8a7094ba1679b4b9b443e0ac9f5e046c79ee8d
author Tejun Heo <tj@kernel.org> 1245639384 +0900
committer Tejun Heo <tj@kernel.org> 1245639384 +0900

x86: ensure percpu lpage doesn't consume too much vmalloc space

On extreme configuration (e.g. 32bit 32-way NUMA machine), lpage
percpu first chunk allocator can consume too much of vmalloc space.
Make it fall back to 4k allocator if the consumption goes over 20%.

[ Impact: add sanity check for lpage percpu first chunk allocator ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Jan Beulich <JBeulich@novell.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Ingo Molnar <mingo@elte.hu>