linux-kernel - Re: [PATCH ftrace.git] Immedate Values Optimized Jump Fix

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Message-ID: <20080718223229.GH31073@elte.hu>
Date:	Sat, 19 Jul 2008 00:32:29 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Mathieu Desnoyers <compudj@...stal.dyndns.org>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	linux-kernel@...r.kernel.org, "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH ftrace.git] Immedate Values Optimized Jump Fix


* Mathieu Desnoyers <compudj@...stal.dyndns.org> wrote:

> * Ingo Molnar (mingo@...e.hu) wrote:
> > 
> > * Mathieu Desnoyers <compudj@...stal.dyndns.org> wrote:
> > 
> > > Hi Ingo,
> > > 
> > > This fix would apply to the ftrace tree which contains the jump-based 
> > > immediate values. I don't know if this tree is still under active 
> > > development, but I guess that it wouldn't hurt to fix it.
> > > 
> > > Caused a kernel OOPS when loading the tracepoint probes once in a 
> > > while on a 8-way x86_64.
> > 
> > We've still got tip/tracing/immediates, with these commits from you:
> > 
> >  $ git-log-line linus.. arch/x86/kernel/immediate.c
> >  ee563d6: immediate values: jump liveliness
> >  e26875a: Immediate Values - Jump
> >  3fc8d03: Immediate Values - x86 Optimization NMI and MCE support
> > 
> > ... but the topic is stalled right now, due to hpa having had 
> > objections. Have those concerns been resolved? (Peter Cc:-ed)
> > 
> > i'd have applied this fix, but it does not apply. The first chunk seems 
> > already be present (in a different form), the second chunk looks much 
> > different.
> > 
> > 	Ingo
> > 
> 
> Hrm, I've edited directly the immediate values: jump liveliness patches,
> which explains why it does not apply. I'll try to unapply/reapply/fold
> the patches and see what it gives.
> 
> Plus, I've noticed that the "Text Edit Lock" patches are not in the 
> immediates branch, thus it fails to compile. Immediate values depends 
> on the Text Edit Lock patches.

feel free to git-cherry-pick the commits together into a coherent unit 
(preferrably all -git based), and we can give it a whirl in tip/master.

	Ingo
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