linux-kernel - Re: [PATCHv5] mm: skip CMA pages when they are not available

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Message-ID: <ZIPXKMMgKSfzDlau@casper.infradead.org>
Date:   Sat, 10 Jun 2023 02:51:36 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     "zhaoyang.huang" <zhaoyang.huang@...soc.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Minchan Kim <minchan@...nel.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        Zhaoyang Huang <huangzhaoyang@...il.com>, ke.wang@...soc.com
Subject: Re: [PATCHv5] mm: skip CMA pages when they are not available

On Fri, Jun 09, 2023 at 03:35:19PM -0700, Andrew Morton wrote:
> > This patch fixes unproductive reclaiming of CMA pages by skipping them when they
> > are not available for current context. It is arise from bellowing OOM issue, which
> > caused by large proportion of MIGRATE_CMA pages among free pages.
> 
> We saw plenty of feedback for earlier versions, but now silence.  Does
> this mean we're all OK with v5?

I'm fine with the implementation now.  I have no idea if this is the right
approach.