On Fri, Aug 23, 2019 at 4:06 PM Peter Zijlstra wrote:
> On Fri, Aug 23, 2019 at 03:42:47PM +0200, Daniel Vetter wrote:
> > I'm assuming the lockdep one will land, so not going to resend that.
>
> I was assuming you'd wake the might_lock_nested() along with the i915
> user through the i915/drm
On Fri, Aug 23, 2019 at 2:12 PM Jason Gunthorpe wrote:
>
> On Fri, Aug 23, 2019 at 10:34:01AM +0200, Daniel Vetter wrote:
> > On Fri, Aug 23, 2019 at 1:14 AM Andrew Morton
> > wrote:
> > >
> > > On Tue, 20 Aug 2019 22:24:40 +0200 Daniel Vetter wrote:
> > >
> > > > Hi Peter,
> > > >
> > > >
On Fri, Aug 23, 2019 at 09:12:34AM -0300, Jason Gunthorpe wrote:
> I still haven't heard a satisfactory answer why a whole new scheme is
> needed and a simple:
>
>if (IS_ENABLED(CONFIG_DEBUG_ATOMIC_SLEEP))
> preempt_disable()
>
> isn't sufficient to catch the problematic cases
On Tue, Aug 20, 2019 at 10:24:40PM +0200, Daniel Vetter wrote:
> On Tue, Aug 20, 2019 at 10:19:01AM +0200, Daniel Vetter wrote:
> > In some special cases we must not block, but there's not a
> > spinlock, preempt-off, irqs-off or similar critical section already
> > that arms the might_sleep()
On Fri, Aug 23, 2019 at 1:14 AM Andrew Morton wrote:
>
> On Tue, 20 Aug 2019 22:24:40 +0200 Daniel Vetter wrote:
>
> > Hi Peter,
> >
> > Iirc you've been involved at least somewhat in discussing this. -mm folks
> > are a bit undecided whether these new non_block semantics are a good idea.
> >
On Tue, 20 Aug 2019 22:24:40 +0200 Daniel Vetter wrote:
> Hi Peter,
>
> Iirc you've been involved at least somewhat in discussing this. -mm folks
> are a bit undecided whether these new non_block semantics are a good idea.
> Michal Hocko still is in support, but Andrew Morton and Jason
On Tue, Aug 20, 2019 at 10:19:01AM +0200, Daniel Vetter wrote:
> In some special cases we must not block, but there's not a
> spinlock, preempt-off, irqs-off or similar critical section already
> that arms the might_sleep() debug checks. Add a non_block_start/end()
> pair to annotate these.
>
>
In some special cases we must not block, but there's not a
spinlock, preempt-off, irqs-off or similar critical section already
that arms the might_sleep() debug checks. Add a non_block_start/end()
pair to annotate these.
This will be used in the oom paths of mmu-notifiers, where blocking is
not
