linux-kernel - Re: [PATCH] mm: Fix endless reclaim on machines with unaccepted memory.

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Message-ID: <Zp-aIfs3DNhAVBmO@tiehlicka>
Date: Tue, 23 Jul 2024 13:55:13 +0200
From: Michal Hocko <mhocko@...e.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc: Vlastimil Babka <vbabka@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Borislav Petkov (AMD)" <bp@...en8.de>,
	Mel Gorman <mgorman@...e.de>,
	Tom Lendacky <thomas.lendacky@....com>,
	Mike Rapoport <rppt@...nel.org>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Jianxiong Gao <jxgao@...gle.com>,
	stable@...r.kernel.org
Subject: Re: [PATCH] mm: Fix endless reclaim on machines with unaccepted
 memory.

On Tue 23-07-24 12:49:41, Kirill A. Shutemov wrote:
> On Tue, Jul 23, 2024 at 09:30:27AM +0200, Vlastimil Babka wrote:
[...]
> > Although just removing the lazy accept mode would be much more appealing
> > solution than this :)
> 
> :P
> 
> Not really an option for big VMs. It might add many minutes to boot time.

Well a huge part of that can be done in the background so the boot
doesn't really have to wait for all of it. If we really have to start
playing whack-a-mole to plug all the potential ways to trigger reclaim
imbalance I think it is fair to re-evaluate how much lazy should the
initialization really be.
-- 
Michal Hocko
SUSE Labs