On Wed, Aug 19, 2015 at 10:18 AM, Frederic Weisbecker
wrote:
> On Tue, Aug 18, 2015 at 03:40:20PM -0700, Andy Lutomirski wrote:
>>
>> I sure hope not, unless it nests inside an NMI-like thing. It's
>> conceivable that this might happen due to perf NMIs causing a failed
>> MSR read or similar. We
On Tue, Aug 18, 2015 at 03:40:20PM -0700, Andy Lutomirski wrote:
> On Tue, Aug 18, 2015 at 3:34 PM, Frederic Weisbecker
> wrote:
> >> If we switched back to exception_enter, we'd have to remember the
> >> previous state, and, with a single exception right now, I think that's
> >> unnecessary.
> >
On Tue, Aug 18, 2015 at 3:34 PM, Frederic Weisbecker wrote:
> On Wed, Aug 12, 2015 at 07:59:44AM -0700, Andy Lutomirski wrote:
>> On Wed, Aug 12, 2015 at 6:32 AM, Frederic Weisbecker
>> wrote:
>> > Right, and doing it the way we did previously was safe wrt. that.
>> >
>> > Can't we have exceptio
On Wed, Aug 12, 2015 at 07:59:44AM -0700, Andy Lutomirski wrote:
> On Wed, Aug 12, 2015 at 6:32 AM, Frederic Weisbecker
> wrote:
> > Right, and doing it the way we did previously was safe wrt. that.
> >
> > Can't we have exceptions slow path just like the way we do it in syscalls?
> >
> > Then th
On Wed, Aug 12, 2015 at 6:32 AM, Frederic Weisbecker wrote:
> On Tue, Aug 11, 2015 at 04:33:05PM -0700, Andy Lutomirski wrote:
>> On Tue, Aug 11, 2015 at 4:22 PM, Frederic Weisbecker
>> wrote:
>> >
>> > On Tue, Aug 11, 2015 at 03:51:26PM -0700, Andy Lutomirski wrote:
>> >> On Tue, Aug 11, 2015 a
On Tue, Aug 11, 2015 at 04:33:05PM -0700, Andy Lutomirski wrote:
> On Tue, Aug 11, 2015 at 4:22 PM, Frederic Weisbecker
> wrote:
> >
> > On Tue, Aug 11, 2015 at 03:51:26PM -0700, Andy Lutomirski wrote:
> >> On Tue, Aug 11, 2015 at 3:38 PM, Frederic Weisbecker
> >> wrote:
> >> >
> >> > This make
On Tue, Aug 11, 2015 at 03:59:37PM -0700, Andy Lutomirski wrote:
> On Tue, Aug 11, 2015 at 3:49 PM, Frederic Weisbecker
> wrote:
> > On Tue, Aug 11, 2015 at 03:25:04PM -0700, Andy Lutomirski wrote:
> >> Can you explain to me what context tracking does that rcu_irq_enter
> >> and vtime_account_irq
On Tue, Aug 11, 2015 at 03:59:37PM -0700, Andy Lutomirski wrote:
> On Tue, Aug 11, 2015 at 3:49 PM, Frederic Weisbecker
> wrote:
> > On Tue, Aug 11, 2015 at 03:25:04PM -0700, Andy Lutomirski wrote:
> >> Can you explain to me what context tracking does that rcu_irq_enter
> >> and vtime_account_irq
On Tue, Aug 11, 2015 at 4:22 PM, Frederic Weisbecker wrote:
>
> On Tue, Aug 11, 2015 at 03:51:26PM -0700, Andy Lutomirski wrote:
>> On Tue, Aug 11, 2015 at 3:38 PM, Frederic Weisbecker
>> wrote:
>> >
>> > This makes me very nervous as well!
>> >
>> > It means that instead of using the context tr
On Tue, Aug 11, 2015 at 03:51:26PM -0700, Andy Lutomirski wrote:
> On Tue, Aug 11, 2015 at 3:38 PM, Frederic Weisbecker
> wrote:
> >
> > This makes me very nervous as well!
> >
> > It means that instead of using the context tracking save/restore model that
> > we had
> > with exception_enter/ex
On Tue, Aug 11, 2015 at 3:49 PM, Frederic Weisbecker wrote:
> On Tue, Aug 11, 2015 at 03:25:04PM -0700, Andy Lutomirski wrote:
>> Can you explain to me what context tracking does that rcu_irq_enter
>> and vtime_account_irq_enter don't do that's expensive? Frankly, I'd
>> rather drop everything ex
On Tue, Aug 11, 2015 at 3:38 PM, Frederic Weisbecker wrote:
> On Tue, Jul 07, 2015 at 03:53:29AM -0700, tip-bot for Andy Lutomirski wrote:
>> Commit-ID: 02bc7768fe447ae305e924b931fa629073a4a1b9
>> Gitweb:
>> http://git.kernel.org/tip/02bc7768fe447ae305e924b931fa629073a4a1b9
>> Author: An
On Tue, Aug 11, 2015 at 03:25:04PM -0700, Andy Lutomirski wrote:
> Can you explain to me what context tracking does that rcu_irq_enter
> and vtime_account_irq_enter don't do that's expensive? Frankly, I'd
> rather drop everything except the context tracking callback.
Irqs have their own hooks in
On Tue, Jul 07, 2015 at 03:53:29AM -0700, tip-bot for Andy Lutomirski wrote:
> Commit-ID: 02bc7768fe447ae305e924b931fa629073a4a1b9
> Gitweb: http://git.kernel.org/tip/02bc7768fe447ae305e924b931fa629073a4a1b9
> Author: Andy Lutomirski
> AuthorDate: Fri, 3 Jul 2015 12:44:31 -0700
> Committe
On Tue, Aug 11, 2015 at 3:18 PM, Frederic Weisbecker wrote:
> On Tue, Jul 07, 2015 at 03:53:29AM -0700, tip-bot for Andy Lutomirski wrote:
>> Commit-ID: 02bc7768fe447ae305e924b931fa629073a4a1b9
>> Gitweb:
>> http://git.kernel.org/tip/02bc7768fe447ae305e924b931fa629073a4a1b9
>> Author: An
On Tue, Jul 07, 2015 at 03:53:29AM -0700, tip-bot for Andy Lutomirski wrote:
> Commit-ID: 02bc7768fe447ae305e924b931fa629073a4a1b9
> Gitweb: http://git.kernel.org/tip/02bc7768fe447ae305e924b931fa629073a4a1b9
> Author: Andy Lutomirski
> AuthorDate: Fri, 3 Jul 2015 12:44:31 -0700
> Committe
Commit-ID: 02bc7768fe447ae305e924b931fa629073a4a1b9
Gitweb: http://git.kernel.org/tip/02bc7768fe447ae305e924b931fa629073a4a1b9
Author: Andy Lutomirski
AuthorDate: Fri, 3 Jul 2015 12:44:31 -0700
Committer: Ingo Molnar
CommitDate: Tue, 7 Jul 2015 10:59:08 +0200
x86/asm/entry/64: Migrate
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