linux-kernel - Re: [PATCH 08/12] mips: Dump memblock regions for debugging

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Date:   Wed, 24 Apr 2019 17:20:14 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Mike Rapoport <rppt@...ux.ibm.com>
Cc:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...e.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Bogendoerfer <tbogendoerfer@...e.de>,
        Huacai Chen <chenhc@...ote.com>,
        Stefan Agner <stefan@...er.ch>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Juergen Gross <jgross@...e.com>, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 08/12] mips: Dump memblock regions for debugging

On Wed, Apr 24, 2019 at 04:45:47PM +0300, Mike Rapoport wrote:
> On Wed, Apr 24, 2019 at 01:47:44AM +0300, Serge Semin wrote:
> > It is useful to have the whole memblock memory space printed to console
> > when basic memlock initializations are done. It can be performed by
> > ready-to-use method memblock_dump_all(), which prints the available
> > and reserved memory spaces if MEMBLOCK_DEBUG config is enabled.
> 
> Nit: there's no MEMBLOCK_DEBUG config option but rather memblock=debug
> command line parameter ;-)
> 

Right. Thanks. I'll reword the message in the next patchset revision.

-Sergey

> > Lets call it at the very end of arch_mem_init() function, when
> > all memblock memory and reserved regions are defined, but before
> > any serious allocation is performed.
> > 
> > Signed-off-by: Serge Semin <fancer.lancer@...il.com>
> > ---
> >  arch/mips/kernel/setup.c | 2 ++
> >  1 file changed, 2 insertions(+)
> > 
> > diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
> > index 2a1b2e7a1bc9..ca493fdf69b0 100644
> > --- a/arch/mips/kernel/setup.c
> > +++ b/arch/mips/kernel/setup.c
> > @@ -824,6 +824,8 @@ static void __init arch_mem_init(char **cmdline_p)
> >  	/* Reserve for hibernation. */
> >  	memblock_reserve(__pa_symbol(&__nosave_begin),
> >  		__pa_symbol(&__nosave_end) - __pa_symbol(&__nosave_begin));
> > +
> > +	memblock_dump_all();
> >  }
> >  
> >  static void __init resource_init(void)
> > -- 
> > 2.21.0
> > 
> 
> -- 
> Sincerely yours,
> Mike.
>