linux-kernel - Re: [PATCH 3/3] printk: implement support for extended console drivers

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Message-ID: <CAMuHMdXTn0+z4PV9UVZZmpMdk_-JUc4x-GqZweOhQyYMTzSOGQ@mail.gmail.com>
Date:	Mon, 29 Jun 2015 17:47:49 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	pmladek@...e.cz, Andrew Morton <akpm@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Kay Sievers <kay@...y.org>,
	Josh Triplett <josh@...htriplett.org>,
	Linux Embedded <linux-embedded@...r.kernel.org>
Subject: Re: [PATCH 3/3] printk: implement support for extended console drivers

Hi Tejun,

On Mon, Jun 29, 2015 at 5:28 PM, Tejun Heo <tj@...nel.org> wrote:
> On Mon, Jun 29, 2015 at 11:20:41AM +0200, Geert Uytterhoeven wrote:
>> On Wed, Apr 29, 2015 at 4:45 PM, Tejun Heo <tj@...nel.org> wrote:
>> > --- a/kernel/printk/printk.c
>> > +++ b/kernel/printk/printk.c
>>
>> > @@ -2196,6 +2227,7 @@ out:
>> >   */
>> >  void console_unlock(void)
>> >  {
>> > +       static char ext_text[CONSOLE_EXT_LOG_MAX];
>>
>> Can you please
>>   a) make this feature optional,
>
> netconsole itself is optional & modular.  I'm not sure making further
> splits is called for, especially given the use cases.

It could be a hidden option, selected by its users (e.g. netconsole).

>>   b) (de)allocate this buffer dynamically when the first/last console with
>>       CON_EXTENDED set is (un)registered?
>
> But yeah, making the buffer allocated on demand should be simple
> enough.  Will get to it.

Thanks!

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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