From: Pete Zaitcev <zaitcev@redhat.com>
To: "Joerg Roedel" <joerg.roedel@amd.com>
Cc: "Andi Kleen" <andi@firstfloor.org>,
ak@suse.de, linux-kernel@vger.kernel.org,
"Benny Halevy" <bhalevy@panasas.com>,
akpm@linux-foundation.org, zaitcev@redhat.com
Subject: Re: Andi, you broke my laptop :-)
Date: Thu, 10 May 2007 09:31:53 -0700 [thread overview]
Message-ID: <20070510093153.9f0accfb.zaitcev@redhat.com> (raw)
In-Reply-To: <20070510133555.GA5705@amd.com>
On Thu, 10 May 2007 15:35:56 +0200, "Joerg Roedel" <joerg.roedel@amd.com> wrote:
> I debugged this problem a bit and my compiler[1]interprets the =A
> constraint as %rax instead of %edx:%eax on x86_64 which causes the
> problem. The appended patch provides a workaround for this and fixed the
> hang on my machine.
>
> [1] gcc version 4.1.3 20070429 (prerelease) (Debian 4.1.2-5)
> alternative_io(ASM_NOP3, ".byte 0x0f,0x01,0xf9", X86_FEATURE_RDTSCP,
> - "=A" (ret), "0" (0ULL) : "ecx", "memory");
> + ASM_OUTPUT2("=a" (eax), "=d" (edx)),
> + "a" (0U), "d" (0U) : "ecx", "memory");
This works for me. Thanks, Joerg.
gcc version 4.1.2 20070424 (Red Hat 4.1.2-11)
-- Pete
next prev parent reply other threads:[~2007-05-10 16:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-09 19:56 Andi, you broke my laptop :-) Pete Zaitcev
2007-05-10 13:01 ` Andi Kleen
2007-05-10 13:35 ` Joerg Roedel
2007-05-10 14:19 ` Andi Kleen
2007-05-10 14:25 ` Benny Halevy
2007-05-10 16:31 ` Pete Zaitcev [this message]
[not found] <4642E8AA.7060501@panasas.com>
2007-05-10 10:12 ` Benny Halevy
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