Commit a7407a27 authored Jun 04, 2014 by Luiz Capitulino Committed by Linus Torvalds Jun 04, 2014

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@redhat.com>
Reviewed-by: Davidlohr Bueso <davidlohr@hp.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent bae7f4ae

mm/hugetlb.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -618,8 +618,8 @@ static void update_and_free_page(struct hstate h, struct page page)
		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);