From: Peter Zijlstra <peterz@infradead.org>
To: Suren Baghdasaryan <surenb@google.com>
Cc: Ingo Molnar <mingo@redhat.com>,
lizefan@huawei.com, Johannes Weiner <hannes@cmpxchg.org>,
axboe@kernel.dk, Dennis Zhou <dennis@kernel.org>,
Dennis Zhou <dennisszhou@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>,
linux-doc@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
kernel-team <kernel-team@android.com>,
Nick Kralevich <nnk@google.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 1/1] psi: do not require setsched permission from the trigger creator
Date: Thu, 1 Aug 2019 23:59:04 +0200 [thread overview]
Message-ID: <20190801215904.GC2332@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <CAJuCfpHGpsU4bVcRxpc3wOybAOtiTKAsB=BNAtZcGnt10j5gbA@mail.gmail.com>
On Thu, Aug 01, 2019 at 11:28:30AM -0700, Suren Baghdasaryan wrote:
> > By marking it FIFO-99 you're in effect saying that your stupid
> > statistics gathering is more important than your life. It will preempt
> > the task that's in control of the band-saw emergency break, it will
> > preempt the task that's adjusting the electromagnetic field containing
> > this plasma flow.
> >
> > That's insane.
>
> IMHO an opt-in feature stops being "stupid" as soon as the user opted
> in to use it, therefore explicitly indicating interest in it. However
> I assume you are using "stupid" here to indicate that it's "less
> important" rather than it's "useless".
Quite; PSI does have its uses. RT just isn't one of them.
next prev parent reply other threads:[~2019-08-01 21:59 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-30 1:33 [PATCH 1/1] psi: do not require setsched permission from the trigger creator Suren Baghdasaryan
2019-07-30 8:11 ` Peter Zijlstra
2019-07-30 17:44 ` Suren Baghdasaryan
2019-08-01 9:51 ` Peter Zijlstra
2019-08-01 18:28 ` Suren Baghdasaryan
2019-08-01 21:59 ` Peter Zijlstra [this message]
2019-08-02 1:19 ` Suren Baghdasaryan
2019-08-06 11:20 ` [tip:sched/urgent] sched/psi: Do " tip-bot for Suren Baghdasaryan
-- strict thread matches above, loose matches on Subject: below --
2019-07-29 19:42 [PATCH 1/1] psi: do " Suren Baghdasaryan
2019-07-29 19:56 ` Greg KH
2019-07-29 20:11 ` Suren Baghdasaryan
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