On 2012-11-20 10:13, Jaegeuk Hanse wrote:

On 11/19/2012 12:07 AM, Jiang Liu wrote:

quoted

The commit 7f1290f2f2a4 ("mm: fix-up zone present pages") tries to
resolve an issue caused by inaccurate zone->present_pages, but that
fix is incomplete and causes regresions with HIGHMEM. And it has been
reverted by commit
5576646 revert "mm: fix-up zone present pages"

This is a following-up patchset for the issue above. It introduces a
new field named "managed_pages" to struct zone, which counts pages
managed by the buddy system from the zone. And zone->present_pages
is used to count pages existing in the zone, which is
    spanned_pages - absent_pages.

But that way, zone->present_pages will be kept in consistence with
pgdat->node_present_pages, which is sum of zone->present_pages.

This patchset has only been tested on x86_64 with nobootmem.c. So need
help to test this patchset on machines:
1) use bootmem.c

If only x86_32 use bootmem.c instead of nobootmem.c? How could I confirm it?

Hi Jaegeuk,
	Thanks for review this patch set.
	Currently x86/x86_64/Sparc have been converted to use nobootmem.c,
and other Arches still use bootmem.c. So need to test it on other Arches,
such as ARM etc. Yesterday we have tested it patchset on an Itanium platform,
so bootmem.c should work as expected too.
	Thanks!
	Gerry


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