linux-kernel - [PATCH v7 0/2] Optimize zone->contiguous update and issue fix

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Message-ID: <20251222145807.11351-1-tianyou.li@intel.com>
Date: Mon, 22 Dec 2025 22:58:05 +0800
From: Tianyou Li <tianyou.li@...el.com>
To: David Hildenbrand <david@...hat.com>,
	Oscar Salvador <osalvador@...e.de>,
	Mike Rapoport <rppt@...nel.org>,
	Wei Yang <richard.weiyang@...il.com>
Cc: linux-mm@...ck.org,
	Yong Hu <yong.hu@...el.com>,
	Nanhai Zou <nanhai.zou@...el.com>,
	Yuan Liu <yuan1.liu@...el.com>,
	Tim Chen <tim.c.chen@...ux.intel.com>,
	Qiuxu Zhuo <qiuxu.zhuo@...el.com>,
	Yu C Chen <yu.c.chen@...el.com>,
	Pan Deng <pan.deng@...el.com>,
	Tianyou Li <tianyou.li@...el.com>,
	Chen Zhang <zhangchen.kidd@...com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v7 0/2] Optimize zone->contiguous update and issue fix

This series contains 2 patches, the first one fix an issue when check
the zone->contiguous during zone grows, the second one add a fast path
to check the zone->contiguous.  The issue fixed by the first patch can
be found in the original code path without the second patch.

Yuan Liu (1):
  mm/memory hotplug: fix zone->contiguous always false when hotplug

Tianyou Li (1):
  mm/memory hotplug/unplug: Optimize zone->contiguous update when
    changes pfn range


Changes History
===============
v2 changes:
   Add check_zone_contiguous_fast function to check zone contiguity for
   new  memory PFN ranges.

v3 changes:
   Add zone contiguity check for empty zones.

v4 changes:
   1. Improve coding style.
   2. Add fast path for zone contiguity check in memory unplugged cases,
      and update test results.
   3. Refactor set_zone_contiguous: the new set_zone_contiguous updates
      zone contiguity based on the fast path results.

v5 changes:
   1. Improve coding style.
   2. Fix a issue in which zone->contiguous was always false when adding
      new memory, leveraging the fast path optimization.

v6 changes:
   1. Improve coding style.
   2. Add comments.

v7 changes:
   1. Rebased to 6.19-rc1
   2. Reorder the patches so that the fix will be the first in the series. 

Tianyou Li (2):
  mm/memory hotplug: fix zone->contiguous always false when hotplug
  mm/memory hotplug/unplug: Optimize zone->contiguous update when
    changes pfn range

 mm/internal.h       |  8 ++++-
 mm/memory_hotplug.c | 75 +++++++++++++++++++++++++++++++++++++++++++--
 mm/mm_init.c        | 12 ++++++--
 3 files changed, 89 insertions(+), 6 deletions(-)

-- 
2.47.1