linux-kernel - Re: [PATCH] trace/events/page_ref: add page info to page

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Message-ID: <58f01375-37db-4720-98bf-eb2d8ed5cc1f@quicinc.com>
Date: Tue, 5 Nov 2024 08:35:59 +0800
From: Kassey Li quic <quic_yingangl@...cinc.com>
To: Matthew Wilcox <willy@...radead.org>
CC: "Vlastimil Babka (SUSE)" <vbabka@...nel.org>, <akpm@...ux-foundation.org>,
        <minchan@...nel.org>, <vbabka@...e.cz>, <iamjoonsoo.kim@....com>,
        <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>
Subject: Re: [PATCH] trace/events/page_ref: add page info to page_ref trace
 event



On 2024/11/4 21:39, Matthew Wilcox wrote:
> On Mon, Nov 04, 2024 at 03:35:37PM +0800, Kassey Li quic wrote:
>>>> In many kernel code we are talking with page other than pfn,
>>>> here we added page algin with pfn.
>>> How exactly would this help you, what are you doing with the trace?
>>
>> we met some problem where filesystem held the page.
>>
>> we can show the page pointer other than pfn in filesystem code.
> 
> Don't do that.  Change the filesystem code to show the pfn, and send
> *that* patch instead.

thanks for the suggest from Matthew and Vlastimil.  On 2024/11/4 21:39, 
Matthew Wilcox wrote: