]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
x86/mm: Only add extra pages count for the first memory range during pre-allocation...
authorYinghai Lu <yinghai@kernel.org>
Wed, 6 Jun 2012 17:55:40 +0000 (10:55 -0700)
committerIngo Molnar <mingo@kernel.org>
Fri, 8 Jun 2012 09:40:50 +0000 (11:40 +0200)
commitbd2753b2dda7bb43c7468826de75f49c6a7e8965
tree1c3c02c226132e257aa77b2db5ae56ed78f4e02b
parent743628e868c5992354fc80b4d1e9a6143da1c0e6
x86/mm: Only add extra pages count for the first memory range during pre-allocation early page table space

Robin found this regression:

| I just tried to boot an 8TB system.  It fails very early in boot with:
| Kernel panic - not syncing: Cannot find space for the kernel page tables

git bisect commit 722bc6b16771ed80871e1fd81c86d3627dda2ac8.

A git revert of that commit does boot past that point on the 8TB
configuration.

That commit will add up extra pages for all memory range even
above 4g.

Try to limit that extra page count adding to first entry only.

Bisected-by: Robin Holt <holt@sgi.com>
Tested-by: Robin Holt <holt@sgi.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/CAE9FiQUj3wyzQxtq9yzBNc9u220p8JZ1FYHG7t%3DMOzJ%3D9BZMYA@mail.gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/mm/init.c