linux-kernel - Re: [????] Re: [????] Re: divide error in x86 and cputime

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Message-ID: <20250707220529.19eb2a74@gandalf.local.home>
Date: Mon, 7 Jul 2025 22:05:29 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: "Li,Rongqing" <lirongqing@...du.com>
Cc: Oleg Nesterov <oleg@...hat.com>, Peter Zijlstra <peterz@...radead.org>,
 David Laight <david.laight.linux@...il.com>, "linux-kernel@...r.kernel.org"
 <linux-kernel@...r.kernel.org>, "vschneid@...hat.com"
 <vschneid@...hat.com>, "mgorman@...e.de" <mgorman@...e.de>,
 "bsegall@...gle.com" <bsegall@...gle.com>, "dietmar.eggemann@....com"
 <dietmar.eggemann@....com>, "vincent.guittot@...aro.org"
 <vincent.guittot@...aro.org>, "juri.lelli@...hat.com"
 <juri.lelli@...hat.com>, "mingo@...hat.com" <mingo@...hat.com>
Subject: Re: [????] Re: [????] Re: divide error in x86 and cputime

On Tue, 8 Jul 2025 01:58:00 +0000
"Li,Rongqing" <lirongqing@...du.com> wrote:

> But mul_u64_u64_div_u64() for x86 should not trigger a division error panic, maybe should return a ULLONG_MAX on #DE (like non-x86 mul_u64_u64_div_u64(),)

Perhaps. But it is still producing garbage.

-- Steve