From: Linus Torvalds <torvalds@linux-foundation.org>
To: Tear <tarrqt@yahoo.com>
Cc: mingo@redhat.com, akpm@linux-foundation.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC][PATCH] IO-APIC blacklist
Date: Sat, 2 Jun 2007 09:39:47 -0700 (PDT) [thread overview]
Message-ID: <alpine.LFD.0.98.0706020938490.23741@woody.linux-foundation.org> (raw)
In-Reply-To: <477357.96605.qm@web63602.mail.re1.yahoo.com>
On Sat, 2 Jun 2007, Tear wrote:
>
> I own a Dell OptiPlex GX240 which, when ACPI is disabled
> but IO-APIC is enabled, shows very slow USB performance.
> I thought that this could be related to IO-APIC and
> tried to boot with "noapic" appended to the kernel
> command line. This way the USB transfer speed returned
> to normal values.
Well, it's almost certainly not the IO-APIC per se.
It's more likely to be some irq routing issue, where ACPI fixes up
something. Do you have diffs of 'dmesg' with and without ACPI?
Linus
next prev parent reply other threads:[~2007-06-02 16:40 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-06-02 14:10 Tear
2007-06-02 14:39 ` Heikki Orsila
2007-06-02 16:39 ` Linus Torvalds [this message]
2007-06-02 20:32 ` Tear
2007-06-02 21:28 ` Linus Torvalds
2007-06-02 22:54 ` Andrew Morton
2007-06-02 23:13 ` Len Brown
2007-06-02 23:33 ` Len Brown
2007-06-02 23:53 ` Tear
2007-06-03 4:16 ` Len Brown
2007-06-03 10:24 ` Tear
2007-06-03 11:25 ` Tear
2007-06-02 17:46 ` Len Brown
2007-06-02 20:39 ` Tear
2007-06-02 20:55 ` Linus Torvalds
2007-06-02 23:48 ` Tear
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