gt; , "Will Deacon" , "Catalin
> Marinas" ,
> "Peter Zijlstra" , lttng-...@lists.lttng.org, "Nathan
> Lynch" , "Paul
> E. McKenney" , "Andrew Morton"
> , "Bhaskar Janakiraman"
> , "Han Shen"
&
Zijlstra" , lttng-...@lists.lttng.org,
>> > "Nathan Lynch" , "Paul
>> > E. McKenney" , "Andrew Morton"
>> > , "Bhaskar Janakiraman"
>> > , "Han Shen"
>> > Sent: Thursday, November 21, 2013 9:3
weird_ issue.
>
> But after a long day of debugging, it's time for some sleep. I will get back
> to this
> tomorrow,
>
> Thanks,
>
> Mathieu
>
> >
> > Thanks
> >
> > Luis
> >
> >
> >
> >
> > On Thu, Nov 21, 2013 at 5:57
I have been monitoring this thread and trying to understand how could
this happen.
I noticed that the definition for ARM of current_thread_info looks like this:
/*
* how to get the thread information struct from C
*/
static inline struct thread_info *current_thread_info(void) __attribute_const_
On Tue, Nov 19, 2013 at 05:02:20PM +, Mathieu Desnoyers wrote:
> Unfortunately I don't have a ARM cross-compiler setup ready. Nathan could test
> it for us though.
>
> It might shuffle things around enough to work around the issue, but with the
> approach you propose, I would be concerned abou
uot;
> , "Linus Torvalds"
> , "Andrew Morton"
>
> Sent: Tuesday, November 19, 2013 11:05:02 AM
> Subject: Re: current_thread_info() not respecting program order with gcc 4.8.x
>
> On Tue, Nov 19, 2013 at 03:29:12PM +, Mathieu Desnoyers wrot
On Tue, Nov 19, 2013 at 05:13:22PM +0100, Jakub Jelinek wrote:
> On Tue, Nov 19, 2013 at 04:57:49PM +0100, Peter Zijlstra wrote:
> > On Tue, Nov 19, 2013 at 03:29:12PM +, Mathieu Desnoyers wrote:
> > > However, looking at ARM arch/arm/include/asm/thread_info.h:
> > >
> > > static inline struct
On Tue, Nov 19, 2013 at 04:57:49PM +0100, Peter Zijlstra wrote:
> On Tue, Nov 19, 2013 at 03:29:12PM +, Mathieu Desnoyers wrote:
> > However, looking at ARM arch/arm/include/asm/thread_info.h:
> >
> > static inline struct thread_info *current_thread_info(void) { register
> > unsigned long sp a
On Tue, Nov 19, 2013 at 03:29:12PM +, Mathieu Desnoyers wrote:
> Hi,
>
> I got a bug report on ARM which appears to be caused by an aggressive
> gcc optimisation starting from gcc 4.8.x due to lack of constraints on
> the current_thread_info() inline assembly. The only logical
> explanation fo
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