Subject: + hugetlb-update_and_free_page-dont-clear-pg_reserved-bit.patch added to -mm tree
To: lcapitulino@xxxxxxxxxx,aarcange@xxxxxxxxxx,davidlohr@xxxxxx,isimatu.yasuaki@xxxxxxxxxxxxxx,kirill.shutemov@xxxxxxxxxxxxxxx,mtosatti@xxxxxxxxxx,n-horiguchi@xxxxxxxxxxxxx,riel@xxxxxxxxxx,rientjes@xxxxxxxxxx,yinghai@xxxxxxxxxx,zhangyanfei@xxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 17 Apr 2014 16:01:25 -0700
The patch titled
Subject: hugetlb: update_and_free_page(): don't clear PG_reserved bit
has been added to the -mm tree. Its filename is
hugetlb-update_and_free_page-dont-clear-pg_reserved-bit.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/hugetlb-update_and_free_page-dont-clear-pg_reserved-bit.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/hugetlb-update_and_free_page-dont-clear-pg_reserved-bit.patch
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------------------------------------------------------
From: Luiz Capitulino <lcapitulino@xxxxxxxxxx>
Subject: hugetlb: update_and_free_page(): don't clear PG_reserved bit
Hugepages pages never get the PG_reserved bit set, so don't clear it.
However, note that if the bit gets mistakenly set free_pages_check() will
catch it.
Signed-off-by: Luiz Capitulino <lcapitulino@xxxxxxxxxx>
Reviewed-by: Davidlohr Bueso <davidlohr@xxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Reviewed-by: Zhang Yanfei <zhangyanfei@xxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Cc: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@xxxxxxxxxxxxxx>
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff -puN mm/hugetlb.c~hugetlb-update_and_free_page-dont-clear-pg_reserved-bit mm/hugetlb.c
--- a/mm/hugetlb.c~hugetlb-update_and_free_page-dont-clear-pg_reserved-bit
+++ a/mm/hugetlb.c
@@ -619,8 +619,8 @@ static void update_and_free_page(struct
for (i = 0; i < pages_per_huge_page(h); i++) {
page[i].flags &= ~(1 << PG_locked | 1 << PG_error |
1 << PG_referenced | 1 << PG_dirty |
- 1 << PG_active | 1 << PG_reserved |
- 1 << PG_private | 1 << PG_writeback);
+ 1 << PG_active | 1 << PG_private |
+ 1 << PG_writeback);
}
VM_BUG_ON_PAGE(hugetlb_cgroup_from_page(page), page);
set_compound_page_dtor(page, NULL);
_
Patches currently in -mm which might be from lcapitulino@xxxxxxxxxx are
hugetlb-prep_compound_gigantic_page-drop-__init-marker.patch
hugetlb-add-hstate_is_gigantic.patch
hugetlb-update_and_free_page-dont-clear-pg_reserved-bit.patch
hugetlb-move-helpers-up-in-the-file.patch
hugetlb-add-support-for-gigantic-page-allocation-at-runtime.patch
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