linux-kernel - Re: [PATCH 1/3] KGDB: Major refactoring

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Message-ID: <20080207121343.GA5697@elte.hu>
Date:	Thu, 7 Feb 2008 13:13:43 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jason Wessel <jason.wessel@...driver.com>
Cc:	Jan Kiszka <jan.kiszka@....de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	kgdb-bugreport@...ts.sourceforge.net,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH 1/3] KGDB: Major refactoring


* Jason Wessel <jason.wessel@...driver.com> wrote:

> > Could you try something else too perhaps, which would be way useful 
> > for me: to add a sysctl flag (or something like that) to change 
> > kgdboc to accept a Ctrl-C and break into kgdb mode? [this means a 
> > simple Ctrl-C on a kgdboc line would break into KGDB as well - but 
> > that would be an acceptable price.] Right now kgdboc just hangs when 
> > gdb attaches - i have to generate a SysRq sequence via a terminal 
> > emulator to break it into KGDB mode.
> 
> FYI, even if you were to hack in a control-c vs sysrq, gdb will still 
> hang on connect because it does not issue a break of any kind when it 
> connects.  It assumes the connection is in a usable state.

sigh. That's quite a usability barrier IMHO.

> The proxy spliter automatically sends the break (or in the current 
> case the sysrq g)

any link to the proxy splitter? Googling for "kgdb proxy splitter" did 
not yield anything obviously on-topic.

	Ingo
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