linux-kernel - Re: [RFC Patch 2/2][Bugfix][x86][hw-breakpoint] Fix return-code to notifier chain in hw_breakpoint

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Message-ID: <20100122092127.GB7127@in.ibm.com>
Date:	Fri, 22 Jan 2010 14:51:27 +0530
From:	"K.Prasad" <prasad@...ux.vnet.ibm.com>
To:	Jan Kiszka <jan.kiszka@...mens.com>,
	Frederic Weisbecker <fweisbec@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: [RFC Patch 2/2][Bugfix][x86][hw-breakpoint] Fix return-code to
	notifier chain in hw_breakpoint_handler

On Fri, Jan 22, 2010 at 10:14:54AM +0100, Jan Kiszka wrote:
> K.Prasad wrote:
> > On Sun, Jan 17, 2010 at 01:10:58AM +0530, K.Prasad wrote:
> >> On Mon, Jan 11, 2010 at 08:15:29PM +0100, Jan Kiszka wrote:
> >>> Frederic Weisbecker wrote:
> >>>> On Fri, Jan 01, 2010 at 12:32:17AM +0530, K.Prasad wrote:
> >>>>> On Thu, Dec 31, 2009 at 01:38:09AM +0100, Frederic Weisbecker wrote:
> >>>>>> On Sat, Dec 26, 2009 at 11:58:33PM +0530, K.Prasad wrote:
> >>>>>>> The hw-breakpoint handler will return NOTIFY_DONE for user-space breakpoints
> >>>>>>> to generate SIGTRAP signal (and not for kernel-space addresses). 
> >>>>>>>
<snipped>
> >> Such a behaviour shouldn't be affected by the above change...your
> >> confirmation would help!
> >>
> > 
> > Hi Jan,
> > 	I presume that the above explanation makes the role of this
> > patch/bugfix clear.
> > 
> > Kindly let me know if you have any further queries.
> > 
> 
> Nope. There should be really no conflicts of your optimization with kvm.
> 
> Jan
> 
> -- 

Hi Jan,
	Thanks for the confirmation.

Hi Frederic,
	Can you pull these fixes in? (LKML references:
20091226182725.GB9494@...ibm.com and 20091226182833.GC9494@...ibm.com).

Thanks,
K.Prasad

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