From: Andrew Morton <akpm@linux-foundation.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>,
Jiri Kosina <jikos@kernel.org>,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
Petr Mladek <pmladek@suse.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
the arch/x86 maintainers <x86@kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"adi-buildroot-devel@lists.sourceforge.net"
<adi-buildroot-devel@lists.sourceforge.net>,
Cris <linux-cris-kernel@axis.com>,
Linux MIPS Mailing List <linux-mips@linux-mips.org>,
"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
linux-s390 <linux-s390@vger.kernel.org>,
Linux-sh list <linux-sh@vger.kernel.org>,
sparclinux <sparclinux@vger.kernel.org>
Subject: Re: [PATCH v3 4/4] printk/nmi: Increase the size of NMI buffer and make it configurable
Date: Fri, 18 Dec 2015 15:03:20 -0800 [thread overview]
Message-ID: <20151218150320.5d377789ee6253379b82412d@linux-foundation.org> (raw)
In-Reply-To: <20151218121141.GR6373@twins.programming.kicks-ass.net>
On Fri, 18 Dec 2015 13:11:41 +0100 Peter Zijlstra <peterz@infradead.org> wrote:
> On Fri, Dec 18, 2015 at 12:29:02PM +0100, Peter Zijlstra wrote:
> > On Fri, Dec 18, 2015 at 10:18:08AM +0000, Daniel Thompson wrote:
> > > I'm not entirely sure that this is an improvement.
> >
> > What I do these days is delete everything in vprintk_emit() and simply
> > call early_printk().
>
> On that, whoever made the device model use vprintk_emit() broke the
> debugger (KGDB/KDB) printk intercept, and the whole vprintk_func
> redirection scheme.
crap, we have a whole set of interfaces which are broken this way.
printk_emit(), vprintk(), vprintk_emit().
commit 7ff9554bb578ba02166071d2d487b7fc7d860d62
Author: Kay Sievers <kay@vrfy.org>
AuthorDate: Thu May 3 02:29:13 2012 +0200
Commit: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CommitDate: Mon May 7 16:53:02 2012 -0700
printk: convert byte-buffer to variable-length record buffer
next prev parent reply other threads:[~2015-12-18 23:03 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-09 13:21 [PATCH v3 0/4] Cleaning printk stuff in NMI context Petr Mladek
2015-12-09 13:21 ` [PATCH v3 1/4] printk/nmi: Generic solution for safe printk in NMI Petr Mladek
2015-12-09 23:50 ` Andrew Morton
2015-12-10 15:26 ` Petr Mladek
2015-12-09 13:21 ` [PATCH v3 2/4] printk/nmi: Use IRQ work only when ready Petr Mladek
2015-12-09 13:21 ` [PATCH v3 3/4] printk/nmi: Warn when some message has been lost in NMI context Petr Mladek
2015-12-09 13:21 ` [PATCH v3 4/4] printk/nmi: Increase the size of NMI buffer and make it configurable Petr Mladek
2015-12-11 11:10 ` Geert Uytterhoeven
2015-12-11 12:41 ` Petr Mladek
2015-12-11 12:47 ` Arnd Bergmann
2015-12-11 12:50 ` Geert Uytterhoeven
2015-12-11 22:57 ` Andrew Morton
2015-12-11 23:21 ` Russell King - ARM Linux
2015-12-11 23:30 ` Andrew Morton
2015-12-15 14:26 ` Petr Mladek
2015-12-17 22:38 ` Andrew Morton
2015-12-18 16:18 ` Petr Mladek
2015-12-14 10:28 ` Daniel Thompson
[not found] ` <alpine.LNX.2.00.1512120024370.9922@cbobk.fhfr.pm>
2015-12-18 10:18 ` Daniel Thompson
2015-12-18 11:29 ` Peter Zijlstra
2015-12-18 12:11 ` Peter Zijlstra
2015-12-18 23:03 ` Andrew Morton [this message]
2015-12-18 14:52 ` Petr Mladek
2015-12-18 17:00 ` Daniel Thompson
2016-03-01 14:04 ` Daniel Thompson
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