linux-kernel - Re: [PATCH v4] page_alloc: consider highatomic reserve in watermark fast

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Date:   Wed, 14 Sep 2022 08:46:15 +0800
From:   yong w <yongw.pur@...il.com>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     jaewon31.kim@...sung.com, mhocko@...nel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        wang.yong12@....com.cn
Subject: Re: [PATCH v4] page_alloc: consider highatomic reserve in watermark fast

Greg KH <gregkh@...uxfoundation.org> 于2022年9月13日周二 21:54写道：

>
> On Tue, Sep 13, 2022 at 09:09:47PM +0800, yong wrote:
> > Hello,
> > This patch is required to be patched in linux-5.4.y and linux-4.19.y.
>
> What is "this patch"?  There is no context here :(
>
Sorry, I forgot to quote the original patch. the patch is as follows

    f27ce0e page_alloc: consider highatomic reserve in watermark fast

> > In addition to that, the following two patches are somewhat related:
> >
> >       3334a45 mm/page_alloc: use ac->high_zoneidx for classzone_idx
> >       9282012 page_alloc: fix invalid watermark check on a negative value
>
> In what way?  What should be done here by us?
>

I think these two patches should also be merged.

    The classzone_idx  parameter is used in the zone_watermark_fast
functionzone, and 3334a45 use ac->high_zoneidx for classzone_idx.
    "9282012 page_alloc: fix invalid watermark check on a negative
value"  fix f27ce0e introduced issues


> confused,
>
> greg k-h