Revert "x86/mm: Fix the size calculation of mapping tables"
authorDave Young <dyoung@redhat.com>
Thu, 18 Oct 2012 06:33:23 +0000 (14:33 +0800)
committerIngo Molnar <mingo@kernel.org>
Wed, 24 Oct 2012 07:38:25 +0000 (09:38 +0200)
commit7b16bbf97375d9fb7fc107b3f80afeb94a204e44
tree9c921175f1f27efdc909658195e9d02252b36d07
parent0e9e3e306c7e472bdcffa34c4c4584301eda03b3
Revert "x86/mm: Fix the size calculation of mapping tables"

Commit:

   722bc6b16771 x86/mm: Fix the size calculation of mapping tables

Tried to address the issue that the first 2/4M should use 4k pages
if PSE enabled, but extra counts should only be valid for x86_32.

This commit caused a kdump regression: the kdump kernel hangs.

Work is in progress to fundamentally fix the various page table
initialization issues that we have, via the design suggested
by H. Peter Anvin, but it's not ready yet to be merged.

So, to get a working kdump revert to the last known working version,
which is the revert of this commit and of a followup fix (which was
incomplete):

   bd2753b2dda7 x86/mm: Only add extra pages count for the first memory range during pre-allocation

Tested kdump on physical and virtual machines.

Signed-off-by: Dave Young <dyoung@redhat.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Flavio Leitner <fbl@redhat.com>
Tested-by: Flavio Leitner <fbl@redhat.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Flavio Leitner <fbl@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: ianfang.cn@gmail.com
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/mm/init.c