Hello,
On Mon, Oct 31, 2016 at 10:45:56AM -0600, Tejun Heo wrote:
> Tracking the owners of mutexes and rwsems does help quite a bit. I
> don't think it's as simple as inheriting io sleep state from the
> current owner tho. The owner might be running or in a non-IO sleep
> when others try to
Hello,
On Mon, Oct 31, 2016 at 10:45:56AM -0600, Tejun Heo wrote:
> Tracking the owners of mutexes and rwsems does help quite a bit. I
> don't think it's as simple as inheriting io sleep state from the
> current owner tho. The owner might be running or in a non-IO sleep
> when others try to
Hello,
On Thu, Nov 03, 2016 at 09:03:45PM +0530, Pavan Kondeti wrote:
> > diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> > index 94732d1..f6baa38 100644
> > --- a/kernel/sched/core.c
> > +++ b/kernel/sched/core.c
> > @@ -3336,11 +3336,17 @@ static void __sched notrace __schedule(bool
Hello,
On Thu, Nov 03, 2016 at 09:03:45PM +0530, Pavan Kondeti wrote:
> > diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> > index 94732d1..f6baa38 100644
> > --- a/kernel/sched/core.c
> > +++ b/kernel/sched/core.c
> > @@ -3336,11 +3336,17 @@ static void __sched notrace __schedule(bool
Hi Tejun,
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index 94732d1..f6baa38 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -3336,11 +3336,17 @@ static void __sched notrace __schedule(bool preempt)
> unsigned long *switch_count;
> struct
Hi Tejun,
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index 94732d1..f6baa38 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -3336,11 +3336,17 @@ static void __sched notrace __schedule(bool preempt)
> unsigned long *switch_count;
> struct
Hello,
On Sat, Oct 29, 2016 at 05:21:26AM +0200, Peter Zijlstra wrote:
> On Fri, Oct 28, 2016 at 03:12:32PM -0400, Tejun Heo wrote:
> > Hello, Peter.
> >
> > On Fri, Oct 28, 2016 at 09:07:02PM +0200, Peter Zijlstra wrote:
> > > One alternative is to inherit the iowait state of the task we block
Hello,
On Sat, Oct 29, 2016 at 05:21:26AM +0200, Peter Zijlstra wrote:
> On Fri, Oct 28, 2016 at 03:12:32PM -0400, Tejun Heo wrote:
> > Hello, Peter.
> >
> > On Fri, Oct 28, 2016 at 09:07:02PM +0200, Peter Zijlstra wrote:
> > > One alternative is to inherit the iowait state of the task we block
On Fri, Oct 28, 2016 at 03:12:32PM -0400, Tejun Heo wrote:
> Hello, Peter.
>
> On Fri, Oct 28, 2016 at 09:07:02PM +0200, Peter Zijlstra wrote:
> > One alternative is to inherit the iowait state of the task we block on.
> > That'll not get rid of the branches much, but it will remove the new
> >
On Fri, Oct 28, 2016 at 03:12:32PM -0400, Tejun Heo wrote:
> Hello, Peter.
>
> On Fri, Oct 28, 2016 at 09:07:02PM +0200, Peter Zijlstra wrote:
> > One alternative is to inherit the iowait state of the task we block on.
> > That'll not get rid of the branches much, but it will remove the new
> >
Hello, Peter.
On Fri, Oct 28, 2016 at 09:07:02PM +0200, Peter Zijlstra wrote:
> One alternative is to inherit the iowait state of the task we block on.
> That'll not get rid of the branches much, but it will remove the new
> mutex APIs.
Yeah, thought about that briefly but we don't necessarily
Hello, Peter.
On Fri, Oct 28, 2016 at 09:07:02PM +0200, Peter Zijlstra wrote:
> One alternative is to inherit the iowait state of the task we block on.
> That'll not get rid of the branches much, but it will remove the new
> mutex APIs.
Yeah, thought about that briefly but we don't necessarily
On Fri, Oct 28, 2016 at 08:27:12PM +0200, Peter Zijlstra wrote:
> On Fri, Oct 28, 2016 at 12:58:09PM -0400, Tejun Heo wrote:
> > --- a/kernel/sched/core.c
> > +++ b/kernel/sched/core.c
> > @@ -3336,11 +3336,17 @@ static void __sched notrace __schedule(bool preempt)
> > unsigned long
On Fri, Oct 28, 2016 at 08:27:12PM +0200, Peter Zijlstra wrote:
> On Fri, Oct 28, 2016 at 12:58:09PM -0400, Tejun Heo wrote:
> > --- a/kernel/sched/core.c
> > +++ b/kernel/sched/core.c
> > @@ -3336,11 +3336,17 @@ static void __sched notrace __schedule(bool preempt)
> > unsigned long
On Fri, Oct 28, 2016 at 12:58:09PM -0400, Tejun Heo wrote:
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -3336,11 +3336,17 @@ static void __sched notrace __schedule(bool preempt)
> unsigned long *switch_count;
> struct pin_cookie cookie;
> struct rq *rq;
> -
On Fri, Oct 28, 2016 at 12:58:09PM -0400, Tejun Heo wrote:
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -3336,11 +3336,17 @@ static void __sched notrace __schedule(bool preempt)
> unsigned long *switch_count;
> struct pin_cookie cookie;
> struct rq *rq;
> -
For an interface to support blocking for IOs, it must call
io_schedule() instead of schedule(). This makes it tedious to add IO
blocking to existing interfaces as the switching between schedule()
and io_schedule() is often buried deep.
As we already have a way to mark the task as IO scheduling,
For an interface to support blocking for IOs, it must call
io_schedule() instead of schedule(). This makes it tedious to add IO
blocking to existing interfaces as the switching between schedule()
and io_schedule() is often buried deep.
As we already have a way to mark the task as IO scheduling,
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