linux-kernel - Re: [PATCH] mm: pass the pfn to set_pageblock

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Message-ID: <Zl2_N9wHOh9ACQpt@casper.infradead.org>
Date: Mon, 3 Jun 2024 14:03:51 +0100
From: Matthew Wilcox <willy@...radead.org>
To: Yajun Deng <yajun.deng@...ux.dev>
Cc: akpm@...ux-foundation.org, rppt@...nel.org, hannes@...xchg.org,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm: pass the pfn to set_pageblock_migratetype

On Mon, Jun 03, 2024 at 08:41:00PM +0800, Yajun Deng wrote:
> It is necessary to calculate the pfn in the set_pageblock_migratetype(),
> but most of the callers already have the pfn.
> 
> To reduce the calculation, pass the pfn to set_pageblock_migratetype().

It's not exactly a hard computation though.  Have you done any
measurements that show this patch is an improvement?