linux-kernel - RE: [RFC PATCH 1/5] printk: implement pr_cont

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Message-ID: <389a62f178d2482b9525f499b82e92df@AcuMS.aculab.com>
Date:   Thu, 20 Aug 2020 08:49:35 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Joe Perches' <joe@...ches.com>,
        John Ogness <john.ogness@...utronix.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>
CC:     Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [RFC PATCH 1/5] printk: implement pr_cont_t

From: Joe Perches
> Sent: 20 August 2020 09:00
> 
> On Thu, 2020-08-20 at 07:44 +0000, David Laight wrote:
> > I've no idea how you'd 'size' the number of buffers.
> 
> I believe they are static and assume no more than 10
> simultaneous uses of printk_begin

What I meant was how you'd work out whether 10 was
in any way appropriate.
ISTM it is either 'too many' or 'nowhere near enough'
depending on exactly what the system is doing.

And if code 'leaks' them you are in deep doo-doos.

	David

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