From: Ingo Molnar <mingo@elte.hu>
To: Clark Williams <williams@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: -rt x86_64 fix for latency tracing
Date: Fri, 2 Jun 2006 21:47:31 +0200 [thread overview]
Message-ID: <20060602194731.GA1104@elte.hu> (raw)
In-Reply-To: <4480938E.3060005@redhat.com>
good catch!
Ingo
* Clark Williams <williams@redhat.com> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Ingo/Steve,
>
> The included patch fixes a bug that causes a segfault in the init
> thread when latency tracing is enabled on x86_64 kernels. Not sure if
> it's completely correct, but it gets me past my segfault and lets me
> complete booting.
>
> diff --git a/arch/x86_64/kernel/entry.S b/arch/x86_64/kernel/entry.S
> index 066497a..b124409 100644
> - --- a/arch/x86_64/kernel/entry.S
> +++ b/arch/x86_64/kernel/entry.S
> @@ -1089,7 +1089,7 @@ ENTRY(mcount)
>
> mov 0x0(%rbp),%rax
> mov 0x8(%rbp),%rdi
> - - mov 0x8(%rax),%rsi
> + mov 0x10(%rax),%rsi
>
> call __trace
>
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> iD8DBQFEgJOOHyuj/+TTEp0RAhkEAKDWQu4cvGBvCQi1UyQcDalbR6SPZACglMRH
> rVy1tTWHbatDx37pXHAXs1s=
> =5Qi9
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prev parent reply other threads:[~2006-06-02 19:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-02 19:37 -rt x86_64 fix for latency tracing Clark Williams
2006-06-02 19:47 ` Ingo Molnar [this message]
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