On Sun, Sep 16, 2018 at 03:38:44PM +0200, Florian Weimer wrote:
> * Rich Felker:
>
> >> I believe the expected userspace interface is that you probe support
> >> with set_robust_list first, and then start using the relevant futex
> >> interfaces only if that call succeeded.
> >
> > In order for
On Sun, Sep 16, 2018 at 03:38:44PM +0200, Florian Weimer wrote:
> * Rich Felker:
>
> >> I believe the expected userspace interface is that you probe support
> >> with set_robust_list first, and then start using the relevant futex
> >> interfaces only if that call succeeded.
> >
> > In order for
* Rich Felker:
>> I believe the expected userspace interface is that you probe support
>> with set_robust_list first, and then start using the relevant futex
>> interfaces only if that call succeeded.
>
> In order for it to work, set_robust_list needs to succeed for all
> threads, present and
* Rich Felker:
>> I believe the expected userspace interface is that you probe support
>> with set_robust_list first, and then start using the relevant futex
>> interfaces only if that call succeeded.
>
> In order for it to work, set_robust_list needs to succeed for all
> threads, present and
On Sun, Sep 16, 2018 at 02:16:25PM +0200, Florian Weimer wrote:
> * Rich Felker:
>
> > I just spent a number of hours helping someone track down a bug that
> > looks like it's some kind of futex_cmpxchg_enabled detection error on
> > powerpc64 (still not sure of the root cause; set_robust_list
On Sun, Sep 16, 2018 at 02:16:25PM +0200, Florian Weimer wrote:
> * Rich Felker:
>
> > I just spent a number of hours helping someone track down a bug that
> > looks like it's some kind of futex_cmpxchg_enabled detection error on
> > powerpc64 (still not sure of the root cause; set_robust_list
* Rich Felker:
> I just spent a number of hours helping someone track down a bug that
> looks like it's some kind of futex_cmpxchg_enabled detection error on
> powerpc64 (still not sure of the root cause; set_robust_list producing
> -ENOSYS), and a while back I hit the same problem on sh2 due to
* Rich Felker:
> I just spent a number of hours helping someone track down a bug that
> looks like it's some kind of futex_cmpxchg_enabled detection error on
> powerpc64 (still not sure of the root cause; set_robust_list producing
> -ENOSYS), and a while back I hit the same problem on sh2 due to
On Sat, 15 Sep 2018, Rich Felker wrote:
> On Sat, Sep 15, 2018 at 05:34:24PM +0200, Thomas Gleixner wrote:
> > By doing that you paper over a non functional fixup which could cause other
> > really hard to decode runtime failures. If that fails there is a bug
> > somewhere else and that runtime
On Sat, 15 Sep 2018, Rich Felker wrote:
> On Sat, Sep 15, 2018 at 05:34:24PM +0200, Thomas Gleixner wrote:
> > By doing that you paper over a non functional fixup which could cause other
> > really hard to decode runtime failures. If that fails there is a bug
> > somewhere else and that runtime
On Sat, Sep 15, 2018 at 12:15:54PM -0400, Rich Felker wrote:
> On Sat, Sep 15, 2018 at 05:34:24PM +0200, Thomas Gleixner wrote:
> > On Thu, 30 Aug 2018, Rich Felker wrote:
> > > On Thu, Aug 30, 2018 at 11:19:58AM +0200, Thomas Gleixner wrote:
> > > > On Wed, 29 Aug 2018, Rich Felker wrote:
> > > >
On Sat, Sep 15, 2018 at 12:15:54PM -0400, Rich Felker wrote:
> On Sat, Sep 15, 2018 at 05:34:24PM +0200, Thomas Gleixner wrote:
> > On Thu, 30 Aug 2018, Rich Felker wrote:
> > > On Thu, Aug 30, 2018 at 11:19:58AM +0200, Thomas Gleixner wrote:
> > > > On Wed, 29 Aug 2018, Rich Felker wrote:
> > > >
On Sat, Sep 15, 2018 at 05:34:24PM +0200, Thomas Gleixner wrote:
> On Thu, 30 Aug 2018, Rich Felker wrote:
> > On Thu, Aug 30, 2018 at 11:19:58AM +0200, Thomas Gleixner wrote:
> > > On Wed, 29 Aug 2018, Rich Felker wrote:
> > >
> > > > I just spent a number of hours helping someone track down a
On Sat, Sep 15, 2018 at 05:34:24PM +0200, Thomas Gleixner wrote:
> On Thu, 30 Aug 2018, Rich Felker wrote:
> > On Thu, Aug 30, 2018 at 11:19:58AM +0200, Thomas Gleixner wrote:
> > > On Wed, 29 Aug 2018, Rich Felker wrote:
> > >
> > > > I just spent a number of hours helping someone track down a
On Thu, 30 Aug 2018, Rich Felker wrote:
> On Thu, Aug 30, 2018 at 11:19:58AM +0200, Thomas Gleixner wrote:
> > On Wed, 29 Aug 2018, Rich Felker wrote:
> >
> > > I just spent a number of hours helping someone track down a bug that
> > > looks like it's some kind of futex_cmpxchg_enabled detection
On Thu, 30 Aug 2018, Rich Felker wrote:
> On Thu, Aug 30, 2018 at 11:19:58AM +0200, Thomas Gleixner wrote:
> > On Wed, 29 Aug 2018, Rich Felker wrote:
> >
> > > I just spent a number of hours helping someone track down a bug that
> > > looks like it's some kind of futex_cmpxchg_enabled detection
On Thu, Aug 30, 2018 at 11:19:58AM +0200, Thomas Gleixner wrote:
> On Wed, 29 Aug 2018, Rich Felker wrote:
>
> > I just spent a number of hours helping someone track down a bug that
> > looks like it's some kind of futex_cmpxchg_enabled detection error on
> > powerpc64 (still not sure of the root
On Thu, Aug 30, 2018 at 11:19:58AM +0200, Thomas Gleixner wrote:
> On Wed, 29 Aug 2018, Rich Felker wrote:
>
> > I just spent a number of hours helping someone track down a bug that
> > looks like it's some kind of futex_cmpxchg_enabled detection error on
> > powerpc64 (still not sure of the root
On Wed, Aug 29, 2018 at 06:22:21PM -0400, Rich Felker wrote:
> If there are archs that support SMP but don't provide their own
Then throw it out the window and drive over it with a tank.
Seriously, an SMP architecture that doesn't have native cmpxchg (or
equivalent) is not worth anybodies time.
On Wed, Aug 29, 2018 at 06:22:21PM -0400, Rich Felker wrote:
> If there are archs that support SMP but don't provide their own
Then throw it out the window and drive over it with a tank.
Seriously, an SMP architecture that doesn't have native cmpxchg (or
equivalent) is not worth anybodies time.
On Wed, 29 Aug 2018, Rich Felker wrote:
> I just spent a number of hours helping someone track down a bug that
> looks like it's some kind of futex_cmpxchg_enabled detection error on
> powerpc64 (still not sure of the root cause; set_robust_list producing
> -ENOSYS), and a while back I hit the
On Wed, 29 Aug 2018, Rich Felker wrote:
> I just spent a number of hours helping someone track down a bug that
> looks like it's some kind of futex_cmpxchg_enabled detection error on
> powerpc64 (still not sure of the root cause; set_robust_list producing
> -ENOSYS), and a while back I hit the
I just spent a number of hours helping someone track down a bug that
looks like it's some kind of futex_cmpxchg_enabled detection error on
powerpc64 (still not sure of the root cause; set_robust_list producing
-ENOSYS), and a while back I hit the same problem on sh2 due to lack
of EFAULT on nommu,
I just spent a number of hours helping someone track down a bug that
looks like it's some kind of futex_cmpxchg_enabled detection error on
powerpc64 (still not sure of the root cause; set_robust_list producing
-ENOSYS), and a while back I hit the same problem on sh2 due to lack
of EFAULT on nommu,
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