linux-kernel - Re: [PATCH v6 0/1] mm: report per-page metadata information

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Message-ID: <2023120648-droplet-slit-0e31@gregkh>
Date:   Wed, 6 Dec 2023 11:36:10 +0900
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Sourav Panda <souravpanda@...gle.com>
Cc:     corbet@....net, rafael@...nel.org, akpm@...ux-foundation.org,
        mike.kravetz@...cle.com, muchun.song@...ux.dev, rppt@...nel.org,
        david@...hat.com, rdunlap@...radead.org, chenlinxuan@...ontech.com,
        yang.yang29@....com.cn, tomas.mudrunka@...il.com,
        bhelgaas@...gle.com, ivan@...udflare.com,
        pasha.tatashin@...een.com, yosryahmed@...gle.com,
        hannes@...xchg.org, shakeelb@...gle.com,
        kirill.shutemov@...ux.intel.com, wangkefeng.wang@...wei.com,
        adobriyan@...il.com, vbabka@...e.cz, Liam.Howlett@...cle.com,
        surenb@...gle.com, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-mm@...ck.org, willy@...radead.org, weixugc@...gle.com
Subject: Re: [PATCH v6 0/1] mm: report per-page metadata information

On Tue, Dec 05, 2023 at 02:31:17PM -0800, Sourav Panda wrote:
> Changelog:
> v6:
> 	- Interface changes
> 	  	- Added per-node nr_page_metadata and
> 		  nr_page_metadata_boot fields that are exported
> 		  in /sys/devices/system/node/nodeN/vmstat

Again, please do not add any new fields to existing sysfs files, that's
not going to work well.  You can add a new sysfs file, that's file, but
do not continue the abuse of the sysfs api in this file.

thanks,

greg k-h