Re: [RFC v2 3/3] mm, printk: introduce new format %pGt for page_type

Petr Mladek
2022-11-09T08:13:24Z

On Wed 2022-11-09 15:14:05, Hyeonggon Yoo wrote:
> On Sun, Nov 06, 2022 at 10:04:25AM -0800, Joe Perches wrote:
> > On Sun, 2022-11-06 at 23:03 +0900, Hyeonggon Yoo wrote:
> > > dump_page() uses %pGp format to print 'flags' field of struct page.
> > > As some page flags (e.g. PG_buddy, see page-flags.h for more details)
> > > are set in page_type field, introduce %pGt format which provides
> > > human readable output of page_type. And use it in dump_page().
> > []
> > > diff --git a/lib/vsprintf.c b/lib/vsprintf.c
> > []
> > > @@ -2056,6 +2056,28 @@ char *format_page_flags(char *buf, char *end, unsigned long flags)
> > > return buf;
> > > }
> > >
> > > +static
>
> Thanks for looking at this.
>
> >
> > noinline_for_stack ?

Honestly, I do not like much adding this without numbers. It has been added
to some functions in vsprintf.c long time ago because it reduced
the stack usage. But I think that it is a compiler and an architecture
specific. And it is not clear if it would really help in this
particular case.

Feel free to omit it.

Best Regards,
Petr