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From: Ingo Molnar <mingo@elte.hu>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andi Kleen <andi@firstfloor.org>,
	Eric Dumazet <eric.dumazet@gmail.com>,
	Jack Steiner <steiner@sgi.com>, Jan Beulich <JBeulich@novell.com>,
	Borislav Petkov <bp@amd64.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Nick Piggin <npiggin@kernel.dk>,
	"x86@kernel.org" <x86@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ingo Molnar <mingo@redhat.com>,
	tee@sgi.com, Nikanth Karthikesan <knikanth@suse.de>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH RFC] x86: avoid atomic operation in test_and_set_bit_lock if possible
Date: Fri, 25 Mar 2011 10:35:09 +0100	[thread overview]
Message-ID: <20110325093509.GC13640@elte.hu> (raw)
In-Reply-To: <AANLkTimib3TqemF9L=VNkcXT3uFam1gYmVtuA3wrAv1j@mail.gmail.com>


* Linus Torvalds <torvalds@linux-foundation.org> wrote:

> ,, and I'd like to point out that we should just say "screw the
> f*cking BIOS, it's doing things wrong". And then just take over the
> PMU events, and make sure that they aren't routed to SCI. Instead of
> the current "ok, roll over and die when the BIOS does something
> idiotic".
> 
> People continuously claim that the BIOS really needs it, and I have
> never EVER seen any good explanation of why that particular sh*t
> argument would b true. It seems to be purely about politics, where
> some idiotic vendor (namely HP) has convinced Intel that they really
> need it. To the point where some engineers seem to have bought into
> the whole thing and actually believe that fairy tale ("firmware can do
> better" - hah! They must be feeding people some bad drugs at the
> cafeteria)

Ok, fully agreed, and i've changed the code to "detect the BIOS breakage,
warn about it but otherwise ignore the BIOS".

Thanks,

	Ingo

  parent reply	other threads:[~2011-03-25  9:35 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-03-24  4:56 [PATCH RFC] x86: avoid atomic operation in test_and_set_bit_lock if possible Nikanth Karthikesan
2011-03-24  8:52 ` Jan Beulich
2011-03-24  8:56 ` Ingo Molnar
2011-03-24 14:52   ` Borislav Petkov
2011-03-24 16:48     ` Jan Beulich
2011-03-24 17:19       ` Ingo Molnar
2011-03-25 10:06         ` Jan Beulich
2011-03-25 11:10           ` Ingo Molnar
2011-03-25 12:04             ` Nikanth Karthikesan
2011-03-25 13:12           ` Jack Steiner
2011-03-25 16:29           ` Linus Torvalds
2011-03-25 16:47             ` Jan Beulich
2011-03-25 16:49             ` Jack Steiner
2011-03-24 17:30       ` Jack Steiner
2011-03-24 20:00         ` Ingo Molnar
2011-03-24 20:40           ` Andi Kleen
2011-03-24 20:50             ` Ingo Molnar
2011-03-24 21:37               ` Andi Kleen
2011-03-24 20:48           ` Eric Dumazet
2011-03-24 20:54             ` Ingo Molnar
2011-03-24 21:02               ` Eric Dumazet
2011-03-24 21:42                 ` Andi Kleen
2011-03-24 23:26                   ` Linus Torvalds
2011-03-24 23:56                     ` Andi Kleen
2011-03-25  5:47                       ` Eric Dumazet
2011-03-25  9:32                         ` Ingo Molnar
2011-03-25  9:44                           ` Eric Dumazet
2011-03-25  9:59                             ` Ingo Molnar
2011-03-25 10:50                               ` Borislav Petkov
2011-03-25 11:10                               ` Peter Zijlstra
2011-03-25 11:11                                 ` Ingo Molnar
2011-03-25 16:16                           ` Robert Richter
2011-03-25 17:22                           ` Andi Kleen
2011-03-25 19:26                             ` Ingo Molnar
2011-03-25  9:38                         ` Eric Dumazet
2011-03-25 20:29                           ` Peter Zijlstra
2011-03-26  8:15                             ` Eric Dumazet
2011-03-26  9:44                               ` Peter Zijlstra
2011-03-26  9:57                               ` Ingo Molnar
2011-03-25  9:22                       ` Ingo Molnar
2011-03-25 10:21                         ` Peter Zijlstra
2011-03-25 16:08                           ` Robert Richter
2011-03-25 19:31                             ` Ingo Molnar
2011-03-25 17:15                           ` Andi Kleen
2011-03-25 19:21                             ` Ingo Molnar
2011-03-25  9:35                     ` Ingo Molnar [this message]
2011-03-24 17:01 ` Linus Torvalds
2011-03-24 17:13 ` Jack Steiner
2011-03-24 18:38 ` Andi Kleen

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