linux-kernel - Re: [PATCH v3 0/2] mm: fix arithmetic for bdi min_ratio and max

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Message-Id: <79e0cb77-ea6a-427f-af5e-c1762049ac89@app.fastmail.com>
Date: Tue, 19 Dec 2023 09:56:12 -0800
From: "Stefan Roesch" <shr@...kernel.io>
To: "Jingbo Xu" <jefflexu@...ux.alibaba.com>,
 "Andrew Morton" <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
 joseph.qi@...ux.alibaba.com, linux-fsdevel@...r.kernel.org,
 linux-block@...r.kernel.org, willy@...radead.org
Subject: Re: [PATCH v3 0/2] mm: fix arithmetic for bdi min_ratio and max_ratio

It would be good if the cover letter describes what this fixes.

On Tue, Dec 19, 2023, at 6:25 AM, Jingbo Xu wrote:
> changes since v2:
> - patch 2: drop div64_u64(), instead write it out mathematically
>   (Matthew Wilcox)
>
> changes since v1:
> - split the previous v1 patch into two separate patches with
>   corresponding "Fixes" tag (Andrew Morton)
> - patch 2: remove "UL" suffix for the "100" constant
>
> v1: 
> https://lore.kernel.org/all/20231218031640.77983-1-jefflexu@linux.alibaba.com/
> v2: 
> https://lore.kernel.org/all/20231219024246.65654-1-jefflexu@linux.alibaba.com/
>
> Jingbo Xu (2):
>   mm: fix arithmetic for bdi min_ratio
>   mm: fix arithmetic for max_prop_frac when setting max_ratio
>
>  mm/page-writeback.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> -- 
> 2.19.1.6.gb485710b