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

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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>

...

This commit is contained in:

Tejun Heo 2009-06-22 11:56:24 +09:00

parent fa8a7094ba

commit 0017c869dd

1 changed files with 15 additions and 3 deletions

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arch/x86/kernel/setup_percpu.c

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