From: "H. Peter Anvin" <hpa@zytor.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Arjan van de Ven <arjan@linux.intel.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
Alek Du <alek.du@intel.com>, Feng Tang <feng.tang@intel.com>,
LKML <linux-kernel@vger.kernel.org>,
Jacob Pan <jacob.jun.pan@intel.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Arjan van de Ven <arjan.van.de.ven@intel.com>
Subject: Re: RFD: Should we remove the HLT check? (was Re: [PATCH 1/8] x86: avoid check hlt if no timer interrupts)
Date: Fri, 07 May 2010 15:27:34 -0700 [thread overview]
Message-ID: <4BE493D6.6000105@zytor.com> (raw)
In-Reply-To: <20100507232448.343b5ebc@lxorguk.ukuu.org.uk>
On 05/07/2010 03:24 PM, Alan Cox wrote:
>> I'd be cool skipping it for family 5 or newer. I'm just wondering if we
>> should kill it completely -- IIRC it was only a handful of 386/486
>> systems which had problems, usually due to marginal power supplies which
>> couldn't handle the noise of a variable load (DOS not having any power
>> management would run at a reliable 100% load) -- that's not exactly the
>> type of systems which would have survived to modern day.
>
> Also SMM and hardware bugs on some platforms - Cyrix MediaGX 5510 for
> example where a hlt at the wrong moment during ATA transfers hung the box
> until power cycle. But all old old stuff.
I think family < 5 seems a reasonable cutoff.
Note that the ATA transfer bug you describe above would not be caught by
the existing check.
-hpa
next prev parent reply other threads:[~2010-05-07 22:28 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-07 17:41 [PATCH 0/8] Moorestown changes in arch/x86 for 35 merge window Jacob Pan
2010-05-07 17:41 ` [PATCH 1/8] x86: avoid check hlt if no timer interrupts Jacob Pan
2010-05-07 20:32 ` RFD: Should we remove the HLT check? (was Re: [PATCH 1/8] x86: avoid check hlt if no timer interrupts) H. Peter Anvin
2010-05-07 20:33 ` Arjan van de Ven
2010-05-07 20:36 ` H. Peter Anvin
2010-05-07 22:24 ` Alan Cox
2010-05-07 22:27 ` H. Peter Anvin [this message]
2010-05-07 22:46 ` Alan Cox
2010-05-07 22:35 ` Arjan van de Ven
2010-05-07 20:54 ` Linus Torvalds
2010-05-07 21:04 ` H. Peter Anvin
2010-05-07 22:07 ` jacob pan
2010-05-07 17:41 ` [PATCH 2/8] x86/mrst/pci: return 0 for non-present pci bars Jacob Pan
2010-05-07 17:41 ` [PATCH 3/8] x86/apic: allow use of lapic timer early calibration result Jacob Pan
2010-05-11 13:46 ` Thomas Gleixner
2010-05-11 19:42 ` Pan, Jacob jun
2010-05-11 19:50 ` Thomas Gleixner
2010-05-11 20:46 ` Pan, Jacob jun
2010-05-11 20:51 ` H. Peter Anvin
2010-05-07 17:41 ` [PATCH 4/8] x86/mrst: change clock selection logic to support medfield Jacob Pan
2010-05-11 14:36 ` Thomas Gleixner
2010-05-11 15:30 ` Alan Cox
2010-05-11 15:50 ` Thomas Gleixner
2010-05-11 16:03 ` Alan Cox
2010-05-13 22:16 ` Pan, Jacob jun
2010-05-17 2:14 ` Du, Alek
2010-05-17 2:27 ` Du, Alek
2010-05-07 17:41 ` [PATCH 5/8] x86/apbt: support more timer configurations on mrst Jacob Pan
2010-05-07 17:41 ` [PATCH 6/8] x86/platform: add a wallclock_init func to x86_platforms ops Jacob Pan
2010-05-11 14:42 ` Thomas Gleixner
2010-05-07 17:41 ` [PATCH 7/8] x86/mrst: add vrtc driver which serves as a wall clock device Jacob Pan
2010-05-07 18:51 ` Joe Perches
2010-05-07 19:02 ` Alan Cox
2010-05-07 19:06 ` Joe Perches
2010-05-07 19:56 ` H. Peter Anvin
2010-05-10 9:17 ` Feng Tang
2010-05-10 18:22 ` H. Peter Anvin
2010-05-11 2:30 ` Feng Tang
2010-05-11 14:57 ` Thomas Gleixner
2010-05-12 2:34 ` Feng Tang
2010-05-17 9:15 ` Thomas Gleixner
2010-05-18 6:27 ` Feng Tang
2010-05-18 7:38 ` Thomas Gleixner
2010-05-18 20:43 ` john stultz
2010-05-18 21:02 ` Thomas Gleixner
2010-05-21 2:15 ` [PATCH 1/3] timekeeping: moving xtime's init to a later time Feng Tang
2010-05-21 2:16 ` [PATCH 2/3] x86: unify current 3 similar ways of saving IRQ info Feng Tang
2010-05-21 2:19 ` [PATCH 3/3] x86/mrst: add vrtc driver which serves as a wall clock device Feng Tang
2010-05-07 17:41 ` [PATCH 8/8] x86/mrst: Add nop functions to x86_init mpparse functions Jacob Pan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4BE493D6.6000105@zytor.com \
--to=hpa@zytor.com \
--cc=alan@lxorguk.ukuu.org.uk \
--cc=alek.du@intel.com \
--cc=arjan.van.de.ven@intel.com \
--cc=arjan@linux.intel.com \
--cc=feng.tang@intel.com \
--cc=jacob.jun.pan@intel.com \
--cc=jacob.jun.pan@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.