linux-kernel - Re: [PATCH 1/4] x86,hw_breakpoint,kgdb: kgdb to use hw

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Message-ID: <20100128201745.GE18683@nowhere>
Date:	Thu, 28 Jan 2010 21:17:47 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Jason Wessel <jason.wessel@...driver.com>
Cc:	linux-kernel@...r.kernel.org, kgdb-bugreport@...ts.sourceforge.net,
	mingo@...e.hu, "K.Prasad" <prasad@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: [PATCH 1/4] x86,hw_breakpoint,kgdb: kgdb to use
	hw_breakpointAPI

On Thu, Jan 28, 2010 at 01:58:26PM -0600, Jason Wessel wrote:
> New version which loses the call back registration, because if we
> register as a different breakpoint type, perf won't reject it.



I don't understand what you mean here.



>  I didn't
> see that loop hole in the API the first time around.
> 
> Also the dr7 fixup in hw_breakpoint.c is not needed.
> 
> The trickery for entering twice into the __kgdb_notify is gone too.
> 
> All the regression tests are still passing.



Ok. Well, let's go for it, as it's a regression that
needs to be fixed anyway.

But we'll need to sanitize various things after that :)

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