From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx111.postini.com [74.125.245.111]) by kanga.kvack.org (Postfix) with SMTP id 07F546B004F for ; Tue, 27 Dec 2011 07:57:03 -0500 (EST) Date: Tue, 27 Dec 2011 13:57:01 +0100 From: Michal Hocko Subject: Re: [PATCH] mm: hugetlb: avoid bogus counter of surplus huge page Message-ID: <20111227125701.GG5344@tiehlicka.suse.cz> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Hillf Danton Cc: linux-mm@kvack.org, LKML , Andrew Morton , KAMEZAWA Hiroyuki On Fri 23-12-11 21:38:38, Hillf Danton wrote: > From: Hillf Danton > Subject: [PATCH] mm: hugetlb: avoid bogus counter of surplus huge page > > If we have to hand back the newly allocated huge page to page allocator, > for any reason, the changed counter should be recovered. > > Cc: Michal Hocko > Cc: KAMEZAWA Hiroyuki > Cc: Andrew Morton > Signed-off-by: Hillf Danton Broken since 2.6.27 (caff3a2c: hugetlb: call arch_prepare_hugepage() for surplus pages) so a stable material Reviewed-by: Michal Hocko Thanks > --- > > --- a/mm/hugetlb.c Tue Dec 20 21:26:30 2011 > +++ b/mm/hugetlb.c Fri Dec 23 21:18:06 2011 > @@ -800,7 +800,7 @@ static struct page *alloc_buddy_huge_pag > > if (page && arch_prepare_hugepage(page)) { > __free_pages(page, huge_page_order(h)); > - return NULL; > + page = NULL; > } > > spin_lock(&hugetlb_lock); > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Michal Hocko SUSE Labs SUSE LINUX s.r.o. Lihovarska 1060/12 190 00 Praha 9 Czech Republic -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org