On Wed, Aug 12, 2020 at 10:18:32AM +0200, pet...@infradead.org wrote:
> > trace_hardirqs_restore+0x59/0x80 kernel/trace/trace_preemptirq.c:106
> > rcu_irq_enter_irqson+0x43/0x70 kernel/rcu/tree.c:1074
> > trace_irq_enable_rcuidle+0x87/0x120
> > include/trace/events/preemptirq.h:40
On Wed, Aug 12, 2020 at 10:06:50AM +0200, Marco Elver wrote:
> On Tue, Aug 11, 2020 at 10:17PM +0200, pet...@infradead.org wrote:
> > On Tue, Aug 11, 2020 at 11:46:51AM +0200, pet...@infradead.org wrote:
> >
> > > So let me once again see if I can't find a better solution for this all.
> > >
On Tue, Aug 11, 2020 at 11:46:51AM +0200, pet...@infradead.org wrote:
> So let me once again see if I can't find a better solution for this all.
> Clearly it needs one :/
So the below boots without triggering the debug code from Marco -- it
should allow nesting local_irq_save/restore under
On Tue, Aug 11, 2020 at 11:20:54AM +0200, pet...@infradead.org wrote:
> On Tue, Aug 11, 2020 at 10:38:50AM +0200, Jürgen Groß wrote:
> > In case you don't want to do it I can send the patch for the Xen
> > variants.
>
> I might've opened a whole new can of worms here. I'm not sure we
> can/want
On Tue, Aug 11, 2020 at 10:38:50AM +0200, Jürgen Groß wrote:
> In case you don't want to do it I can send the patch for the Xen
> variants.
I might've opened a whole new can of worms here. I'm not sure we
can/want to fix the entire fallout this release :/
Let me ponder this a little, because the
On 11.08.20 10:12, Peter Zijlstra wrote:
On Tue, Aug 11, 2020 at 09:57:55AM +0200, Jürgen Groß wrote:
On 11.08.20 09:41, Peter Zijlstra wrote:
On Fri, Aug 07, 2020 at 05:19:03PM +0200, Marco Elver wrote:
My hypothesis here is simply that kvm_wait() may be called in a place
where we get the
On 11.08.20 10:12, Peter Zijlstra wrote:
On Tue, Aug 11, 2020 at 09:57:55AM +0200, Jürgen Groß wrote:
On 11.08.20 09:41, Peter Zijlstra wrote:
On Fri, Aug 07, 2020 at 05:19:03PM +0200, Marco Elver wrote:
My hypothesis here is simply that kvm_wait() may be called in a place
where we get the
On Tue, Aug 11, 2020 at 09:57:55AM +0200, Jürgen Groß wrote:
> On 11.08.20 09:41, Peter Zijlstra wrote:
> > On Fri, Aug 07, 2020 at 05:19:03PM +0200, Marco Elver wrote:
> >
> > > My hypothesis here is simply that kvm_wait() may be called in a place
> > > where we get the same case I mentioned to
On 11.08.20 09:41, Peter Zijlstra wrote:
On Fri, Aug 07, 2020 at 05:19:03PM +0200, Marco Elver wrote:
My hypothesis here is simply that kvm_wait() may be called in a place
where we get the same case I mentioned to Peter,
raw_local_irq_save(); /* or other IRQs off without tracing */
On Fri, Aug 07, 2020 at 05:19:03PM +0200, Marco Elver wrote:
> My hypothesis here is simply that kvm_wait() may be called in a place
> where we get the same case I mentioned to Peter,
>
> raw_local_irq_save(); /* or other IRQs off without tracing */
> ...
> kvm_wait() /* IRQ
On 11.08.20 09:00, Marco Elver wrote:
On Fri, 7 Aug 2020 at 17:19, Marco Elver wrote:
On Fri, Aug 07, 2020 at 02:08PM +0200, Marco Elver wrote:
On Fri, 7 Aug 2020 at 14:04, Jürgen Groß wrote:
On 07.08.20 13:38, Marco Elver wrote:
On Fri, Aug 07, 2020 at 12:35PM +0200, Jürgen Groß wrote:
On 07.08.20 13:38, Marco Elver wrote:
On Fri, Aug 07, 2020 at 12:35PM +0200, Jürgen Groß wrote:
On 07.08.20 11:50, Marco Elver wrote:
On Fri, Aug 07, 2020 at 11:24AM +0200, Jürgen Groß wrote:
On 07.08.20 11:01, Marco Elver wrote:
On Thu, 6 Aug 2020 at 18:06, Marco Elver wrote:
On Thu, 6
On 07.08.20 11:50, Marco Elver wrote:
On Fri, Aug 07, 2020 at 11:24AM +0200, Jürgen Groß wrote:
On 07.08.20 11:01, Marco Elver wrote:
On Thu, 6 Aug 2020 at 18:06, Marco Elver wrote:
On Thu, 6 Aug 2020 at 15:17, Marco Elver wrote:
On Thu, Aug 06, 2020 at 01:32PM +0200, pet...@infradead.org
On 07.08.20 11:01, Marco Elver wrote:
On Thu, 6 Aug 2020 at 18:06, Marco Elver wrote:
On Thu, 6 Aug 2020 at 15:17, Marco Elver wrote:
On Thu, Aug 06, 2020 at 01:32PM +0200, pet...@infradead.org wrote:
On Thu, Aug 06, 2020 at 09:47:23AM +0200, Marco Elver wrote:
Testing my hypothesis that
On Thu, Aug 06, 2020 at 09:47:23AM +0200, Marco Elver wrote:
> Testing my hypothesis that raw then nested non-raw
> local_irq_save/restore() breaks IRQ state tracking -- see the reproducer
> below. This is at least 1 case I can think of that we're bound to hit.
Aaargh!
> diff --git a/init/main.c
On 05.08.20 16:12, pet...@infradead.org wrote:
On Wed, Aug 05, 2020 at 03:59:40PM +0200, Marco Elver wrote:
On Wed, Aug 05, 2020 at 03:42PM +0200, pet...@infradead.org wrote:
Shouldn't we __always_inline those? They're going to be really small.
I can send a v2, and you can choose. For
On Wed, Aug 05, 2020 at 04:12:37PM +0200, pet...@infradead.org wrote:
> On Wed, Aug 05, 2020 at 03:59:40PM +0200, Marco Elver wrote:
> > On Wed, Aug 05, 2020 at 03:42PM +0200, pet...@infradead.org wrote:
>
> > > Shouldn't we __always_inline those? They're going to be really small.
> >
> > I can
On Wed, Aug 05, 2020 at 03:59:40PM +0200, Marco Elver wrote:
> On Wed, Aug 05, 2020 at 03:42PM +0200, pet...@infradead.org wrote:
> > Shouldn't we __always_inline those? They're going to be really small.
>
> I can send a v2, and you can choose. For reference, though:
>
> 86271ee0
On Wed, Aug 05, 2020 at 03:26:29PM +0200, Marco Elver wrote:
> Add missing noinstr to arch_local*() helpers, as they may be called from
> noinstr code.
>
> On a KCSAN config with CONFIG_PARAVIRT=y, syzbot stumbled across corrupt
Cute, so I've been working on adding objtool support for this a
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