Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753925AbZDXAeI (ORCPT ); Thu, 23 Apr 2009 20:34:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752571AbZDXAdy (ORCPT ); Thu, 23 Apr 2009 20:33:54 -0400 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:53842 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750886AbZDXAdy (ORCPT ); Thu, 23 Apr 2009 20:33:54 -0400 From: KOSAKI Motohiro To: Andrew Morton Subject: Re: [PATCH 15/22] Do not disable interrupts in free_page_mlock() Cc: kosaki.motohiro@jp.fujitsu.com, Mel Gorman , linux-mm@kvack.org, cl@linux-foundation.org, npiggin@suse.de, linux-kernel@vger.kernel.org, ming.m.lin@intel.com, yanmin_zhang@linux.intel.com, peterz@infradead.org, penberg@cs.helsinki.fi, Lee Schermerhorn , Dave Hansen In-Reply-To: <20090423155951.6778bdd3.akpm@linux-foundation.org> References: <1240408407-21848-16-git-send-email-mel@csn.ul.ie> <20090423155951.6778bdd3.akpm@linux-foundation.org> Message-Id: <20090424090721.1047.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.50 [ja] Date: Fri, 24 Apr 2009 09:33:50 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3949 Lines: 122 > > @@ -157,14 +157,9 @@ static inline void mlock_migrate_page(struct page *newpage, struct page *page) > > */ > > static inline void free_page_mlock(struct page *page) > > { > > - if (unlikely(TestClearPageMlocked(page))) { > > - unsigned long flags; > > - > > - local_irq_save(flags); > > - __dec_zone_page_state(page, NR_MLOCK); > > - __count_vm_event(UNEVICTABLE_MLOCKFREED); > > - local_irq_restore(flags); > > - } > > + __ClearPageMlocked(page); > > + __dec_zone_page_state(page, NR_MLOCK); > > + __count_vm_event(UNEVICTABLE_MLOCKFREED); > > } > > The conscientuous reviewer runs around and checks for free_page_mlock() > callers in other .c files which might be affected. > > Only there are no such callers. > > The reviewer's job would be reduced if free_page_mlock() wasn't > needlessly placed in a header file! very sorry. How about this? ============================================= Subject: [PATCH] move free_page_mlock() to page_alloc.c Currently, free_page_mlock() is only called from page_alloc.c. Thus, we can move it to page_alloc.c. Cc: Lee Schermerhorn Cc: Mel Gorman Cc: Christoph Lameter Cc: Pekka Enberg Cc: Dave Hansen Cc: Andrew Morton Signed-off-by: KOSAKI Motohiro --- mm/internal.h | 18 ------------------ mm/page_alloc.c | 21 +++++++++++++++++++++ 2 files changed, 21 insertions(+), 18 deletions(-) Index: b/mm/internal.h =================================================================== --- a/mm/internal.h 2009-04-24 09:12:03.000000000 +0900 +++ b/mm/internal.h 2009-04-24 09:12:10.000000000 +0900 @@ -150,23 +150,6 @@ static inline void mlock_migrate_page(st } } -/* - * free_page_mlock() -- clean up attempts to free and mlocked() page. - * Page should not be on lru, so no need to fix that up. - * free_pages_check() will verify... - */ -static inline void free_page_mlock(struct page *page) -{ - if (unlikely(TestClearPageMlocked(page))) { - unsigned long flags; - - local_irq_save(flags); - __dec_zone_page_state(page, NR_MLOCK); - __count_vm_event(UNEVICTABLE_MLOCKFREED); - local_irq_restore(flags); - } -} - #else /* CONFIG_HAVE_MLOCKED_PAGE_BIT */ static inline int is_mlocked_vma(struct vm_area_struct *v, struct page *p) { @@ -175,7 +158,6 @@ static inline int is_mlocked_vma(struct static inline void clear_page_mlock(struct page *page) { } static inline void mlock_vma_page(struct page *page) { } static inline void mlock_migrate_page(struct page *new, struct page *old) { } -static inline void free_page_mlock(struct page *page) { } #endif /* CONFIG_HAVE_MLOCKED_PAGE_BIT */ Index: b/mm/page_alloc.c =================================================================== --- a/mm/page_alloc.c 2009-04-24 09:12:03.000000000 +0900 +++ b/mm/page_alloc.c 2009-04-24 09:13:25.000000000 +0900 @@ -491,6 +491,27 @@ static inline void __free_one_page(struc zone->free_area[order].nr_free++; } +#ifdef CONFIG_HAVE_MLOCKED_PAGE_BIT +/* + * free_page_mlock() -- clean up attempts to free and mlocked() page. + * Page should not be on lru, so no need to fix that up. + * free_pages_check() will verify... + */ +static void free_page_mlock(struct page *page) +{ + if (unlikely(TestClearPageMlocked(page))) { + unsigned long flags; + + local_irq_save(flags); + __dec_zone_page_state(page, NR_MLOCK); + __count_vm_event(UNEVICTABLE_MLOCKFREED); + local_irq_restore(flags); + } +} +#else +static void free_page_mlock(struct page *page) { } +#endif + static inline int free_pages_check(struct page *page) { free_page_mlock(page); -- 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/