RE: [PATCH v4 0/2] mm/memory hotplug/unplug: Optimize zone contiguous check when changing pfn range

[Liu, Yuan1]

> -----Original Message-----
> From: David Hildenbrand (Arm) <david@xxxxxxxxxx>
> Sent: Wednesday, April 22, 2026 3:47 PM
> To: Liu, Yuan1 <yuan1.liu@xxxxxxxxx>; Oscar Salvador <osalvador@xxxxxxx>;
> Mike Rapoport <rppt@xxxxxxxxxx>; Wei Yang <richard.weiyang@xxxxxxxxx>
> Cc: linux-mm@xxxxxxxxx; Hu, Yong <yong.hu@xxxxxxxxx>; Zou, Nanhai
> <nanhai.zou@xxxxxxxxx>; Tim Chen <tim.c.chen@xxxxxxxxxxxxxxx>; Zhuo, Qiuxu
> <qiuxu.zhuo@xxxxxxxxx>; Chen, Yu C <yu.c.chen@xxxxxxxxx>; Deng, Pan
> <pan.deng@xxxxxxxxx>; Li, Tianyou <tianyou.li@xxxxxxxxx>; Chen Zhang
> <zhangchen.kidd@xxxxxx>; linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH v4 0/2] mm/memory hotplug/unplug: Optimize zone
> contiguous check when changing pfn range
> 
> On 4/21/26 14:55, Yuan Liu wrote:
> > This series cleans up the overlap memory map init check and
> > optimizes zone contiguous check when changing pfn range.
> >
> > In addition to providing a significant improvement for VM hotplug
> > (see the second patch for reference), it brings benefits for CXL
> > hotplug as well. The link is as follows
> > https://lore.kernel.org/all/20260409023552.GA2807@AE/
> >
> > v3 link:
> >     https://lore.kernel.org/all/20260408031615.1831922-1-
> yuan1.liu@xxxxxxxxx/
> >
> > v4 changes:
> >     Add a new patch for clean up overlap memory map init check
> 
> Didn't you also wanted to add a patch to improve shrink_zone_span to check
> both
> sides of the PAGES_PER_SUBSECTION block for fitting nid+zid?

Hi David

My apologies for missing this. I will include it in the next version.
 
> --
> Cheers,
> 
> David