From: Peter Zijlstra <peterz@infradead.org>
To: Tao Zhou <tao.zhou@linux.dev>
Cc: mingo@redhat.com, tglx@linutronix.de, juri.lelli@redhat.com,
vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de,
bristot@redhat.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, linux-api@vger.kernel.org, x86@kernel.org,
pjt@google.com, posk@google.com, avagin@google.com,
jannh@google.com, tdelisle@uwaterloo.ca, mark.rutland@arm.com,
posk@posk.io
Subject: Re: [RFC][PATCH v2 5/5] sched: User Mode Concurency Groups
Date: Thu, 27 Jan 2022 13:26:26 +0100 [thread overview]
Message-ID: <YfKPcrc4qp5HeIjC@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <Ye67uQa4CwUuQJVY@geo.homenetwork>
On Mon, Jan 24, 2022 at 10:46:17PM +0800, Tao Zhou wrote:
> > +/**
> > + * sys_umcg_wait: transfer running context
> > + *
> > + * Called like:
> > + *
> > + * self->state = UMCG_TASK_RUNNABLE | UMCG_TF_COND_WAIT;
> > + * ...
> > + * sys_umcg_wait(0, time);
> > + *
> > + * The syscall will clear TF_COND_WAIT and wait until state becomes RUNNING.
> > + * The code '...' must not contain syscalls
> > + *
> > + * If self->next_tid is set and indicates a valid UMCG task with RUNNABLE state
> > + * that task will be made RUNNING and woken -- transfering the running context
> > + * to that task. In this case self->next_tid is modified with TID_RUNNING to
> > + * indicate self->next_tid is consumed.
> > + *
> > + * If self->next has TID_RUNNING set, it is validated the related task has
>
> /self->next/self->next_tid/
Yeah, there's more of that, I'll be sure to go re-read all the comments.
next prev parent reply other threads:[~2022-01-27 12:26 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-20 15:55 [RFC][PATCH v2 0/5] sched: User Managed Concurrency Groups Peter Zijlstra
2022-01-20 15:55 ` [RFC][PATCH v2 1/5] mm: Avoid unmapping pinned pages Peter Zijlstra
2022-01-20 18:03 ` Nadav Amit
2022-01-21 7:59 ` Peter Zijlstra
2022-01-20 18:25 ` David Hildenbrand
2022-01-21 7:51 ` Peter Zijlstra
2022-01-21 8:22 ` David Hildenbrand
2022-01-21 8:59 ` Peter Zijlstra
2022-01-21 9:04 ` David Hildenbrand
2022-01-21 11:40 ` Peter Zijlstra
2022-01-21 12:04 ` David Hildenbrand
2022-01-20 15:55 ` [RFC][PATCH v2 2/5] entry,x86: Create common IRQ operations for exceptions Peter Zijlstra
2022-01-21 16:34 ` Mark Rutland
2022-01-20 15:55 ` [RFC][PATCH v2 3/5] sched/umcg: add WF_CURRENT_CPU and externise ttwu Peter Zijlstra
2022-01-20 15:55 ` [RFC][PATCH v2 4/5] x86/uaccess: Implement unsafe_try_cmpxchg_user() Peter Zijlstra
2022-01-27 2:17 ` Sean Christopherson
2022-01-27 6:36 ` Sean Christopherson
2022-01-27 9:56 ` Peter Zijlstra
2022-01-27 23:33 ` Sean Christopherson
2022-01-28 0:17 ` Nick Desaulniers
2022-01-28 16:29 ` Sean Christopherson
2022-01-27 9:55 ` Peter Zijlstra
2022-01-20 15:55 ` [RFC][PATCH v2 5/5] sched: User Mode Concurency Groups Peter Zijlstra
2022-01-21 11:47 ` Peter Zijlstra
2022-01-21 15:18 ` Peter Zijlstra
2022-01-24 14:29 ` Peter Zijlstra
2022-01-24 16:44 ` Peter Zijlstra
2022-01-24 17:06 ` Peter Oskolkov
2022-01-25 14:59 ` Peter Zijlstra
2022-01-24 13:59 ` Peter Zijlstra
2022-01-21 12:26 ` Peter Zijlstra
2022-01-21 16:57 ` Mark Rutland
2022-01-24 9:48 ` Peter Zijlstra
2022-01-24 10:03 ` Peter Zijlstra
2022-01-24 10:07 ` Peter Zijlstra
2022-01-24 10:27 ` Mark Rutland
2022-01-24 14:46 ` Tao Zhou
2022-01-27 12:19 ` Peter Zijlstra
2022-01-27 18:33 ` Tao Zhou
2022-01-27 12:25 ` Peter Zijlstra
2022-01-27 18:47 ` Tao Zhou
2022-01-27 12:26 ` Peter Zijlstra [this message]
2022-01-27 18:31 ` Tao Zhou
2022-01-20 17:28 ` [RFC][PATCH v2 0/5] sched: User Managed Concurrency Groups Peter Oskolkov
2022-01-21 8:01 ` Peter Zijlstra
2022-01-21 18:01 ` Steven Rostedt
2022-01-24 8:20 ` Peter Zijlstra
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