From: Borislav Petkov <bp@alien8.de>
To: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>, Ingo Molnar <mingo@elte.hu>,
LKML <linux-kernel@vger.kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andy Lutomirski <luto@kernel.org>,
Denys Vlasenko <dvlasenk@redhat.com>,
Oleg Nesterov <oleg@redhat.com>, Dave Hansen <dave@sr71.net>
Subject: Re: [all better] Re: regression: massive trouble with fpu rework
Date: Mon, 29 Jun 2015 15:09:22 +0200 [thread overview]
Message-ID: <20150629130921.GF12383@pd.tnic> (raw)
In-Reply-To: <1435580843.2866.5.camel@gmail.com>
On Mon, Jun 29, 2015 at 02:27:23PM +0200, Mike Galbraith wrote:
> With it commented out, and fpu__init_system() either back at previously
> booting position [5] or at original [0], doesn't matter, box is dead,
> but differently. It stalls after setting clocksource to tsc, and just
> sits there.
... which means that unmasking the CPUID features is absolutely needed
on Linux. Not unmasking probably triggers this original bug which
066941bd4eeb ("x86: unmask CPUID levels on Intel CPUs")
fixed.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
--
next prev parent reply other threads:[~2015-06-29 13:09 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-27 6:25 regression: massive trouble with fpu rework Mike Galbraith
2015-06-27 8:18 ` [all better] " Mike Galbraith
2015-06-27 8:25 ` Ingo Molnar
2015-06-27 8:55 ` Mike Galbraith
2015-06-27 9:37 ` Borislav Petkov
2015-06-27 11:01 ` Mike Galbraith
2015-06-27 21:02 ` Henrique de Moraes Holschuh
2015-06-28 3:11 ` Mike Galbraith
2015-06-28 15:06 ` Henrique de Moraes Holschuh
2015-06-28 15:39 ` Mike Galbraith
2015-06-29 1:12 ` Henrique de Moraes Holschuh
2015-06-29 6:40 ` Ingo Molnar
2015-06-29 8:25 ` Mike Galbraith
2015-06-29 8:33 ` Borislav Petkov
2015-06-29 8:41 ` Mike Galbraith
2015-06-29 9:35 ` Ingo Molnar
2015-06-29 9:57 ` Borislav Petkov
2015-06-29 19:48 ` H. Peter Anvin
2015-06-30 5:14 ` Ingo Molnar
2015-06-29 12:27 ` Mike Galbraith
2015-06-29 13:09 ` Borislav Petkov [this message]
2015-06-30 5:16 ` Ingo Molnar
2015-06-30 20:22 ` H. Peter Anvin
2015-07-09 13:13 ` Henrique de Moraes Holschuh
2015-06-29 19:50 ` H. Peter Anvin
2015-06-30 5:18 ` Ingo Molnar
2015-06-30 5:24 ` [tip:x86/urgent] x86/fpu: Fix FPU related boot regression when CPUID masking BIOS feature is enabled tip-bot for Ingo Molnar
2015-06-27 8:18 ` regression: massive trouble with fpu rework Ingo Molnar
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