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From: Peter Zijlstra <peterz@infradead.org>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: mingo@kernel.org, linux-kernel@vger.kernel.org,
	Suren Baghdasaryan <surenb@google.com>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 1/5] sched/pci: Reduce psimon FIFO priority
Date: Thu, 1 Aug 2019 23:02:03 +0200	[thread overview]
Message-ID: <20190801210203.GA3578@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20190801174907.GA16554@cmpxchg.org>

On Thu, Aug 01, 2019 at 01:49:07PM -0400, Johannes Weiner wrote:
> On Thu, Aug 01, 2019 at 01:13:49PM +0200, Peter Zijlstra wrote:
> > PSI defaults to a FIFO-99 thread, reduce this to FIFO-1.
> > 
> > FIFO-99 is the very highest priority available to SCHED_FIFO and
> > it not a suitable default; it would indicate the psi work is the
> > most important work on the machine.
> > 
> > Since Real-Time tasks will have pre-allocated memory and locked it in
> > place, Real-Time tasks do not care about PSI. All it needs is to be
> > above OTHER.
> > 
> > Cc: Suren Baghdasaryan <surenb@google.com>
> > Cc: Johannes Weiner <hannes@cmpxchg.org>
> > Cc: Thomas Gleixner <tglx@linutronix.de>
> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> 
> Acked-by: Johannes Weiner <hannes@cmpxchg.org>

Thanks!

> Subject should be s/pci/psi/

Yeah, already fixed that.. obviously one sees such typoes only after
sending ;-)

  parent reply	other threads:[~2019-08-01 21:02 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-01 11:13 [PATCH 0/5] Fix FIFO-99 abuse Peter Zijlstra
2019-08-01 11:13 ` [PATCH 1/5] sched/pci: Reduce psimon FIFO priority Peter Zijlstra
2019-08-01 17:49   ` Johannes Weiner
2019-08-01 18:31     ` Suren Baghdasaryan
2019-08-01 21:03       ` Suren Baghdasaryan
2019-08-01 21:02     ` Peter Zijlstra [this message]
2019-08-01 11:13 ` [PATCH 2/5] rcu/tree: Fix SCHED_FIFO params Peter Zijlstra
2019-08-01 13:51   ` Paul E. McKenney
2019-08-01 14:43     ` Peter Zijlstra
2019-08-01 15:33       ` Paul E. McKenney
2019-08-01 11:13 ` [PATCH 3/5] crypto: Reduce default RT priority Peter Zijlstra
2019-08-09  6:19   ` Herbert Xu
2019-08-01 11:13 ` [PATCH 4/5] media/ivtv: Reduce default FIFO priority Peter Zijlstra
2019-08-01 12:24   ` Andy Walls
2019-08-01 12:38     ` Peter Zijlstra
2019-08-02  8:58       ` Peter Zijlstra
2019-08-07  9:26         ` Hans Verkuil
2019-08-01 11:13 ` [PATCH 5/5] spi: Reduce kthread priority Peter Zijlstra
2019-08-01 11:26   ` Mark Brown
2019-08-01 12:07     ` Peter Zijlstra
2019-08-01 11:27   ` Geert Uytterhoeven
2019-08-01 12:12     ` Peter Zijlstra
2019-08-01 12:16       ` Geert Uytterhoeven
2019-08-01 11:27   ` Enric Balletbo i Serra
2019-08-01 12:17     ` Peter Zijlstra
2019-08-01 12:35       ` Mark Brown
2019-08-01 15:44         ` Doug Anderson
2019-08-02 11:22   ` Applied "spi: Reduce kthread priority" to the spi tree Mark Brown
2019-08-01 13:17 ` [PATCH 0/5] Fix FIFO-99 abuse Qais Yousef
2019-08-02  9:32   ` Peter Zijlstra
2019-08-02  9:50     ` Thomas Gleixner
2019-08-02 10:26     ` Qais Yousef
2019-08-02 12:41       ` Peter Zijlstra
2019-08-02 14:08         ` Qais Yousef
2019-08-02 14:33           ` Peter Zijlstra
2019-08-02 15:21             ` Qais Yousef

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