[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20180226203937.GA21543@tassilo.jf.intel.com>
Date: Mon, 26 Feb 2018 12:39:37 -0800
From: Andi Kleen <ak@...ux.intel.com>
To: Peter Zijlstra <peterz@...radead.org>
Cc: Cong Wang <xiyou.wangcong@...il.com>,
"Liang, Kan" <kan.liang@...el.com>, jolsa@...hat.com,
bigeasy@...utronix.de, "H. Peter Anvin" <hpa@...or.com>,
Ingo Molnar <mingo@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>, x86 <x86@...nel.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: Long standing kernel warning: perfevents: irq loop stuck!
> Given the HSD143 errata and its possible relevance, have you tried
> changing the magic number to 32, does it then still fix things?
>
> No real objection to the patch as such, it just needs a coherent comment
> and a tested-by tag I think.
128 min period will affect a lot of valid use cases with slower ticking
events. I often use smaller periods there.
It would be better to debug this properly.
Or at a minimum only do the limitation for the events that tick really
fast (like cycles, uops retired etc.)
-Andi
Powered by blists - more mailing lists