Linux-HyperV Archive on lore.kernel.org
 help / color / Atom feed
From: Wei Yang <richard.weiyang@linux.alibaba.com>
To: David Hildenbrand <david@redhat.com>
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 <akpm@linux-foundation.org>,
	Alexander Duyck <alexander.h.duyck@linux.intel.com>,
	Vlastimil Babka <vbabka@suse.cz>,
	Oscar Salvador <osalvador@suse.de>,
	Mel Gorman <mgorman@techsingularity.net>,
	Michal Hocko <mhocko@kernel.org>,
	Dave Hansen <dave.hansen@intel.com>,
	Wei Yang <richard.weiyang@linux.alibaba.com>,
	Mike Rapoport <rppt@kernel.org>
Subject: Re: [PATCH v1 1/5] mm/page_alloc: convert "report" flag of __free_one_page() to a proper flag
Date: Tue, 29 Sep 2020 16:58:43 +0800
Message-ID: <20200929085843.GA36790@L-31X9LVDL-1304.local> (raw)
In-Reply-To: <20200928182110.7050-2-david@redhat.com>

On Mon, Sep 28, 2020 at 08:21:06PM +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.
>
>Reviewed-by: Alexander Duyck <alexander.h.duyck@linux.intel.com>
>Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
>Reviewed-by: Oscar Salvador <osalvador@suse.de>
>Cc: Andrew Morton <akpm@linux-foundation.org>
>Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com>
>Cc: Mel Gorman <mgorman@techsingularity.net>
>Cc: Michal Hocko <mhocko@kernel.org>
>Cc: Dave Hansen <dave.hansen@intel.com>
>Cc: Vlastimil Babka <vbabka@suse.cz>
>Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
>Cc: Oscar Salvador <osalvador@suse.de>
>Cc: Mike Rapoport <rppt@kernel.org>
>Signed-off-by: David Hildenbrand <david@redhat.com>

Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com>

>---
> 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 df90e3654f97..daab90e960fe 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 for the (possibly merged) page. (will
>+ * *not* mark 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);
> }
> 
>@@ -1379,7 +1390,7 @@ 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);
>@@ -1395,7 +1406,7 @@ 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);
> }
> 
>@@ -3288,7 +3299,8 @@ 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

  parent reply index

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-28 18:21 [PATCH v1 0/5] mm: place pages to the freelist tail when onling and undoing isolation David Hildenbrand
2020-09-28 18:21 ` [PATCH v1 1/5] mm/page_alloc: convert "report" flag of __free_one_page() to a proper flag David Hildenbrand
2020-09-28 20:11   ` Pankaj Gupta
2020-09-29  8:58   ` Wei Yang [this message]
2020-10-02 13:17   ` Michal Hocko
2020-10-02 13:41   ` Matthew Wilcox
2020-10-02 14:48     ` David Hildenbrand
2020-10-02 14:57       ` David Hildenbrand
2020-09-28 18:21 ` [PATCH v1 2/5] mm/page_alloc: place pages to tail in __putback_isolated_page() David Hildenbrand
2020-09-28 20:38   ` Pankaj Gupta
2020-09-29  9:10   ` Wei Yang
2020-10-02 13:19   ` Michal Hocko
2020-09-28 18:21 ` [PATCH v1 3/5] mm/page_alloc: always move pages to the tail of the freelist in unset_migratetype_isolate() David Hildenbrand
2020-09-28 20:55   ` Pankaj Gupta
2020-09-29  9:18   ` Wei Yang
2020-09-29 10:12     ` David Hildenbrand
2020-09-30  7:48       ` Wei Yang
2020-10-02 13:24   ` Michal Hocko
2020-10-02 15:20     ` David Hildenbrand
2020-10-05  6:56       ` Michal Hocko
2020-10-05  8:20         ` Mel Gorman
2020-10-05  9:11           ` David Hildenbrand
2020-09-28 18:21 ` [PATCH v1 4/5] mm/page_alloc: place pages to tail in __free_pages_core() David Hildenbrand
2020-09-28 20:33   ` Pankaj Gupta
2020-09-29  9:36   ` Wei Yang
2020-09-29 10:14     ` David Hildenbrand
2020-10-02 13:41   ` Michal Hocko
2020-10-02 15:10     ` David Hildenbrand
2020-09-28 18:21 ` [PATCH v1 5/5] mm/memory_hotplug: update comment regarding zone shuffling David Hildenbrand
2020-09-29  9:40   ` Wei Yang
2020-10-02 13:41   ` Michal Hocko

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200929085843.GA36790@L-31X9LVDL-1304.local \
    --to=richard.weiyang@linux.alibaba.com \
    --cc=akpm@linux-foundation.org \
    --cc=alexander.h.duyck@linux.intel.com \
    --cc=dave.hansen@intel.com \
    --cc=david@redhat.com \
    --cc=linux-acpi@vger.kernel.org \
    --cc=linux-hyperv@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mm@kvack.org \
    --cc=mgorman@techsingularity.net \
    --cc=mhocko@kernel.org \
    --cc=osalvador@suse.de \
    --cc=rppt@kernel.org \
    --cc=vbabka@suse.cz \
    --cc=xen-devel@lists.xenproject.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-HyperV Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-hyperv/0 linux-hyperv/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-hyperv linux-hyperv/ https://lore.kernel.org/linux-hyperv \
		linux-hyperv@vger.kernel.org
	public-inbox-index linux-hyperv

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-hyperv


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git