From: Nix <nix@esperi.org.uk>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
Neil Brown <nfbrown@novell.com>,
linux-nfs@vger.kernel.org
Subject: Re: [PATCH RFC] x86: hpet: Avoid the readback penalty
Date: Thu, 16 Sep 2010 21:04:50 +0100 [thread overview]
Message-ID: <87d3sdfo9p.fsf@spindle.srvr.nix> (raw)
In-Reply-To: <alpine.LFD.2.00.1009151500060.2416@localhost6.localdomain6> (Thomas Gleixner's message of "Wed, 15 Sep 2010 15:11:57 +0200 (CEST)")
On 15 Sep 2010, Thomas Gleixner said:
> On Tue, 14 Sep 2010, tip-bot for Thomas Gleixner wrote:
>> x86: hpet: Work around hardware stupidity
>
> After my brain recovered from yesterdays exposure with the x86 timer
> horror, I came up with a different solution for this problem, which
> avoids the readback of the compare register completely. It works
> nicely on my affected ATI system, but needs some exposure to the other
> machines.
>
> Comments ?
Works for me. (I still have boot problems, but these seem to be
NFS-related: -ESTALE from an apparently random subset of my mount points
at initial mount time. Restarting rpc.mountd on the server fixes
it. This is with nfs-utils 1.2.2, but I see it right up to 60abb98, that
being the most recent version I tested. This doesn't happen if the
client is running 2.6.34.x, as far as I can tell. It also doesn't happen
with all my 2.6.35.x clients. Sigh. I hate bugs like this.)
next prev parent reply other threads:[~2010-09-16 20:25 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <tip-54ff7e595d763d894104d421b103a89f7becf47c@git.kernel.org>
2010-09-14 23:36 ` [tip:x86/urgent] x86: hpet: Work around hardware stupidity Venkatesh Pallipadi
2010-09-15 13:11 ` [PATCH RFC] x86: hpet: Avoid the readback penalty Thomas Gleixner
2010-09-15 13:43 ` Anders Larsen
2010-09-15 13:54 ` John Drescher
[not found] ` <AANLkTikHfDUh3LdmyA5eMNACFPfi6pqGLFJiyzVm79X_@mail.gmail.com>
2010-09-16 4:45 ` Fwd: " John Drescher
2010-09-15 14:40 ` Borislav Petkov
2010-09-15 14:42 ` Thomas Gleixner
2010-09-16 12:28 ` Borislav Petkov
2010-09-16 20:04 ` Nix [this message]
2010-09-18 7:49 ` Damien Wyart
2010-09-18 9:41 ` Thomas Gleixner
2010-09-18 13:43 ` Nix
2010-09-18 10:13 ` [tip:x86/timers] x86: Hpet: Avoid the comparator " tip-bot for Thomas Gleixner
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