linux-kernel - Re: [PATCH 0/2] tracing/tlb/x85: Fix splat of calling RCU trace code on offline CPU

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Message-ID: <20150206161803.30cdd90e@gandalf.local.home>
Date:	Fri, 6 Feb 2015 16:18:03 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Sedat Dilek <sedat.dilek@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Dave Hansen <dave@...1.net>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	linux-next <linux-next@...r.kernel.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Kristen Carlson Accardi <kristen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 0/2] tracing/tlb/x85: Fix splat of calling RCU trace
 code on offline CPU

On Fri, 6 Feb 2015 22:07:56 +0100
Sedat Dilek <sedat.dilek@...il.com> wrote:

> Your patchset fixes the issue for me (look at the attached files for
> more detailed information).

So I can add your Tested-by tag?

> 
> I tested the "To Be Loved" (TBL VS. TLB flushes) edition against
> Linux-next (next-20150204) where I had originally seen and reported
> the call-trace.
> 
> Before I forget... The Fixes-tag misses pointing to Dave Hansen's...
> 
> commit d17d8f9dedb9dd76fd540a5c497101529d9eb25a
> "x86/mm: Add tracepoints for TLB flushes"

Sure, I can add that, and even Cc stable for 3.17+.

> 
> My POV is that both patches somehow belong together.
> If you decide to push them through two different trees, please add a
> note/reference to each other.

The second patch should reference the first one.

But the first patch is a much broader change and more generic which
could affect many other locations as well. It is specific to
tracepoints, where the tlb one is specific to a single instance. As the
first patch affects all tracepoints, I want it in my tree.


-- Steve
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