From: Andrew Morton <akpm@linux-foundation.org>
To: Zhaoyang Huang <huangzhaoyang@gmail.com>
Cc: "zhaoyang.huang" <zhaoyang.huang@unisoc.com>,
Roman Gushchin <guro@fb.com>, Minchan Kim <minchan@kernel.org>,
Roman Gushchin <roman.gushchin@linux.dev>,
Joonsoo Kim <iamjoonsoo.kim@lge.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
ke.wang@unisoc.com
Subject: Re: [PATCHv5] mm: optimization on page allocation when CMA enabled
Date: Mon, 9 Oct 2023 17:14:15 -0700 [thread overview]
Message-ID: <20231009171415.cfc26b45c2f9f4489afe16c2@linux-foundation.org> (raw)
In-Reply-To: <CAGWkznHqQHMN1QXz7os7AQTYdzc3+LEq+z2bWOzLbiseV=560A@mail.gmail.com>
On Sun, 8 Oct 2023 15:54:40 +0800 Zhaoyang Huang <huangzhaoyang@gmail.com> wrote:
> > Roman previously asked
> >
> > : Also I'm a bit concerned about potential performance implications.
> > : Would be great to provide some benchmarks or some data. Probably it's
> > : ok because of we have pcp caches on top, but I'm not 100% sure.
> >
> > Are you able to perform such testing and tell us the result?
> I have applied this patch in a v5.4 based ANDROID system and got no
> regression problem. Actually, this commit is aimed to have
> alloc_pages(GFP_USER) use CMA instead of stealing U&R(could lead to
> GFP_KERNEL fail) only when zone's free pages and free cma are around
> WATERMARK_LOW/MIN which would NOT affect most scenarios.
OK, thanks.
Could the appropriate people please take a look at this? It has been
in mm-unstable since May.
Thanks.
next prev parent reply other threads:[~2023-10-10 0:14 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-11 5:22 zhaoyang.huang
2023-10-06 21:17 ` Andrew Morton
2023-10-08 7:54 ` Zhaoyang Huang
2023-10-10 0:14 ` Andrew Morton [this message]
2023-10-10 1:31 ` Roman Gushchin
2023-10-10 1:42 ` Zhaoyang Huang
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