linux-kernel - Re: [RFC v2 3/3] mm, printk: introduce new format %pGt for page

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Date:   Mon, 7 Nov 2022 16:41:05 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Petr Mladek <pmladek@...e.com>
Cc:     Hyeonggon Yoo <42.hyeyoo@...il.com>, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Christoph Lameter <cl@...ux.com>,
        Pekka Enberg <penberg@...nel.org>,
        David Rientjes <rientjes@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Naoya Horiguchi <naoya.horiguchi@....com>,
        Miaohe Lin <linmiaohe@...wei.com>,
        Matthew Wilcox <willy@...radead.org>,
        Minchan Kim <minchan@...nel.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Hugh Dickins <hughd@...gle.com>,
        Muchun Song <songmuchun@...edance.com>,
        David Hildenbrand <david@...hat.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC v2 3/3] mm, printk: introduce new format %pGt for page_type

On Mon, Nov 07, 2022 at 03:20:34PM +0100, Petr Mladek wrote:
> On Mon 2022-11-07 13:18:52, Andy Shevchenko wrote:
> > On Sun, Nov 06, 2022 at 11:03:55PM +0900, Hyeonggon Yoo wrote:
> > > dump_page() uses %pGp format to print 'flags' field of struct page.

...

> > > [    1.816443] page_type: 0xffffffff()
> > 
> > Why do we have empty parentheses? I would expect either something there, or no
> > parentheses at all.
> 
> This looks fine. format_page_flags() does the same for %pGp.

...

> > > +	%pGt	0xffefffff(slab)
> > 
> > No space before ( ?
> 
> Also looks fine. %pGp does the same.

Maybe we can modify them before or after this change?

-- 
With Best Regards,
Andy Shevchenko