From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1E080C43466 for ; Fri, 18 Sep 2020 01:53:34 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 919B920872 for ; Fri, 18 Sep 2020 01:53:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 919B920872 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id A44536B0003; Thu, 17 Sep 2020 21:53:32 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9CE696B0055; Thu, 17 Sep 2020 21:53:32 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 895BA6B005A; Thu, 17 Sep 2020 21:53:32 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0126.hostedemail.com [216.40.44.126]) by kanga.kvack.org (Postfix) with ESMTP id 6FCA76B0003 for ; Thu, 17 Sep 2020 21:53:32 -0400 (EDT) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id 358F92466 for ; Fri, 18 Sep 2020 01:53:32 +0000 (UTC) X-FDA: 77274510264.14.dirt44_5c1670e27127 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin14.hostedemail.com (Postfix) with ESMTP id 18C6318229818 for ; Fri, 18 Sep 2020 01:53:32 +0000 (UTC) X-HE-Tag: dirt44_5c1670e27127 X-Filterd-Recvd-Size: 5549 Received: from out30-133.freemail.mail.aliyun.com (out30-133.freemail.mail.aliyun.com [115.124.30.133]) by imf45.hostedemail.com (Postfix) with ESMTP for ; Fri, 18 Sep 2020 01:53:29 +0000 (UTC) X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R141e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04357;MF=richard.weiyang@linux.alibaba.com;NM=1;PH=DS;RN=15;SR=0;TI=SMTPD_---0U9GXrdc_1600394005; Received: from localhost(mailfrom:richard.weiyang@linux.alibaba.com fp:SMTPD_---0U9GXrdc_1600394005) by smtp.aliyun-inc.com(127.0.0.1); Fri, 18 Sep 2020 09:53:26 +0800 Date: Fri, 18 Sep 2020 09:53:25 +0800 From: Wei Yang To: David Hildenbrand Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-hyperv@vger.kernel.org, xen-devel@lists.xenproject.org, linux-acpi@vger.kernel.org, Andrew Morton , Alexander Duyck , Mel Gorman , Michal Hocko , Dave Hansen , Vlastimil Babka , Wei Yang , Oscar Salvador , Mike Rapoport Subject: Re: [PATCH RFC 1/4] mm/page_alloc: convert "report" flag of __free_one_page() to a proper flag Message-ID: <20200918015325.GA54754@L-31X9LVDL-1304.local> Reply-To: Wei Yang References: <20200916183411.64756-1-david@redhat.com> <20200916183411.64756-2-david@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200916183411.64756-2-david@redhat.com> X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Sep 16, 2020 at 08:34:08PM +0200, David Hildenbrand wrote: >Let's prepare for additional flags and avoid long parameter lists of bools. >Follow-up patches will also make use of the flags in __free_pages_ok(), >however, I wasn't able to come up with a better name for the type - should >be good enough for internal purposes. > >Cc: Andrew Morton >Cc: Alexander Duyck >Cc: Mel Gorman >Cc: Michal Hocko >Cc: Dave Hansen >Cc: Vlastimil Babka >Cc: Wei Yang >Cc: Oscar Salvador >Cc: Mike Rapoport >Signed-off-by: David Hildenbrand >--- > mm/page_alloc.c | 28 ++++++++++++++++++++-------- > 1 file changed, 20 insertions(+), 8 deletions(-) > >diff --git a/mm/page_alloc.c b/mm/page_alloc.c >index 6b699d273d6e..91cefb8157dd 100644 >--- a/mm/page_alloc.c >+++ b/mm/page_alloc.c >@@ -77,6 +77,18 @@ > #include "shuffle.h" > #include "page_reporting.h" > >+/* Free One Page flags: for internal, non-pcp variants of free_pages(). */ >+typedef int __bitwise fop_t; >+ >+/* No special request */ >+#define FOP_NONE ((__force fop_t)0) >+ >+/* >+ * Skip free page reporting notification after buddy merging (will *not* mark __free_one_page() may not merge buddy when its buddy is not available. Would this comment be a little confusing? >+ * the page reported, only skip the notification). >+ */ >+#define FOP_SKIP_REPORT_NOTIFY ((__force fop_t)BIT(0)) >+ > /* prevent >1 _updater_ of zone percpu pageset ->high and ->batch fields */ > static DEFINE_MUTEX(pcp_batch_high_lock); > #define MIN_PERCPU_PAGELIST_FRACTION (8) >@@ -948,10 +960,9 @@ buddy_merge_likely(unsigned long pfn, unsigned long buddy_pfn, > * -- nyc > */ > >-static inline void __free_one_page(struct page *page, >- unsigned long pfn, >- struct zone *zone, unsigned int order, >- int migratetype, bool report) >+static inline void __free_one_page(struct page *page, unsigned long pfn, >+ struct zone *zone, unsigned int order, >+ int migratetype, fop_t fop_flags) > { > struct capture_control *capc = task_capc(zone); > unsigned long buddy_pfn; >@@ -1038,7 +1049,7 @@ static inline void __free_one_page(struct page *page, > add_to_free_list(page, zone, order, migratetype); > > /* Notify page reporting subsystem of freed page */ >- if (report) >+ if (!(fop_flags & FOP_SKIP_REPORT_NOTIFY)) > page_reporting_notify_free(order); > } > >@@ -1368,7 +1379,7 @@ static void free_pcppages_bulk(struct zone *zone, int count, > if (unlikely(isolated_pageblocks)) > mt = get_pageblock_migratetype(page); > >- __free_one_page(page, page_to_pfn(page), zone, 0, mt, true); >+ __free_one_page(page, page_to_pfn(page), zone, 0, mt, FOP_NONE); > trace_mm_page_pcpu_drain(page, 0, mt); > } > spin_unlock(&zone->lock); >@@ -1384,7 +1395,7 @@ static void free_one_page(struct zone *zone, > is_migrate_isolate(migratetype))) { > migratetype = get_pfnblock_migratetype(page, pfn); > } >- __free_one_page(page, pfn, zone, order, migratetype, true); >+ __free_one_page(page, pfn, zone, order, migratetype, FOP_NONE); > spin_unlock(&zone->lock); > } > >@@ -3277,7 +3288,8 @@ void __putback_isolated_page(struct page *page, unsigned int order, int mt) > lockdep_assert_held(&zone->lock); > > /* Return isolated page to tail of freelist. */ >- __free_one_page(page, page_to_pfn(page), zone, order, mt, false); >+ __free_one_page(page, page_to_pfn(page), zone, order, mt, >+ FOP_SKIP_REPORT_NOTIFY); > } > > /* >-- >2.26.2 -- Wei Yang Help you, Help me