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From: Jakub Jelinek <jakub@redhat.com>
To: Luis Lozano <llozano@google.com>
Cc: Alexander Holler <holler@ahsoftware.de>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Richard Henderson <rth@twiddle.net>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Will Deacon <will.deacon@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Peter Zijlstra <peterz@infradead.org>,
	lttng-dev@lists.lttng.org, Nathan Lynch <Nathan_Lynch@mentor.com>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Bhaskar Janakiraman <bjanakiraman@chromium.org>,
	Han Shen <shenhan@chromium.org>
Subject: Re: current_thread_info() not respecting program order with gcc 4.8.x
Date: Fri, 22 Nov 2013 01:39:04 +0100	[thread overview]
Message-ID: <20131122003904.GT892@tucnak.redhat.com> (raw)
In-Reply-To: <CANxoKds1iLpXK0yb1qW_Z4tLSRccrf69nYUV7mLSJBMwSrjwmQ@mail.gmail.com>

On Thu, Nov 21, 2013 at 03:45:35PM -0800, Luis Lozano wrote:
> I think we need a reproducer. Without this we may all be going on the
> wrong path. This whole conversation started on an *assumption* that
> some accesses were being reordered.
> 
> evidence of the reorder or reproducer please?

Yeah, if a compiler bug is suspected, can anybody please open
a bugreport in http://gcc.gnu.org/bugzilla/ with the preprocessed source,
compiler version, flags and how it was configured and some hint in which
function to look for what exactly?  We don't necessarily need a runtime
small reproducer, but if it can be shown in the assembly what has been
reordered and why you think it shouldn't, with the above mentioned input
that ought to be sufficient.  Thanks.

	Jakub

  reply	other threads:[~2013-11-22  0:39 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <52803E5D.3050109@mentor.com>
2013-11-11 15:47 ` might_sleep warnings in overwrite mode Nathan Lynch
2013-11-14 18:16 ` Nathan Lynch
     [not found] ` <52851395.3010306@mentor.com>
2013-11-15  2:34   ` Mathieu Desnoyers
     [not found]   ` <67652521.68027.1384482849638.JavaMail.zimbra@efficios.com>
2013-11-18 19:30     ` Nathan Lynch
2013-11-19 15:29     ` current_thread_info() not respecting program order with gcc 4.8.x Mathieu Desnoyers
2013-11-19 15:57       ` Peter Zijlstra
2013-11-19 16:13         ` Jakub Jelinek
2013-11-19 16:21           ` Peter Zijlstra
2013-11-19 16:05       ` Will Deacon
2013-11-19 17:02         ` Mathieu Desnoyers
2013-11-19 17:33           ` Peter Zijlstra
2013-11-19 21:56             ` Multiple local register variables w/ same register Richard Henderson
2013-11-19 22:08               ` Jakub Jelinek
2013-11-19 22:13               ` Måns Rullgård
2013-11-19 22:25               ` Mathieu Desnoyers
2013-11-19 22:34                 ` [lttng-dev] " Mathieu Desnoyers
2013-11-20  0:41       ` current_thread_info() not respecting program order with gcc 4.8.x Linus Torvalds
2013-11-20 15:10         ` Mathieu Desnoyers
2013-11-21 16:02         ` Alexander Holler
2013-11-21 22:12           ` Luis Lozano
2013-11-21 22:32           ` Linus Torvalds
2013-11-21 23:03             ` Bhaskar Janakiraman
2013-11-21 23:18             ` Alexander Holler
2013-11-21 23:45               ` Luis Lozano
2013-11-22  0:39                 ` Jakub Jelinek [this message]
2013-11-22  1:57                   ` Mathieu Desnoyers
2013-11-22  2:36                     ` Luis Lozano
2013-11-22  3:38                       ` Mathieu Desnoyers
2013-11-22  8:16                         ` Luis Lozano
2013-11-22  8:18                         ` Luis Lozano
2013-11-22  8:33                           ` Luis Lozano
2013-11-22 13:06                           ` Mathieu Desnoyers
2013-11-22 20:33                             ` [lttng-dev] " Mathieu Desnoyers
     [not found]                         ` <CANxoKduwK=9__0WFXFcTWjQn3Rbn+HgSWZyL0FN_VuJ2Q_2TPQ@mail.gmail.com>
2013-11-22 13:02                           ` Mathieu Desnoyers
2013-11-22  0:17               ` Linus Torvalds
2013-11-22  0:34                 ` Alexander Holler

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