From: Andi Kleen <ak@suse.de>
To: Chuck Ebbert <76306.1226@compuserve.com>
Cc: Andrew Morton <akpm@osdl.org>, Ingo Molnar <mingo@elte.hu>,
Linus Torvalds <torvalds@osdl.org>,
linux-kernel@vger.kernel.org
Subject: Re: [patch] i386: early pagefault handler
Date: 05 Jul 2006 15:10:11 +0200 [thread overview]
Message-ID: <p73veqcp58s.fsf@verdi.suse.de> (raw)
In-Reply-To: <200607050745_MC3-1-C42B-9937@compuserve.com>
Chuck Ebbert <76306.1226@compuserve.com> writes:
> Page faults during kernel initialization can be hard to diagnose.
>
> Add a handler that prints the fault address, EIP and top of stack
> when an early page fault happens.
You should do it for all the exceptions then
(except perhaps NMI). Isn't much more work - see the x86-64 code.
> +hlt_loop:
> + hlt
There are still supported i386 CPUs that don't support HLT and
would recursively fault here.
> + rep ; nop
> + jmp 1b
Looks a bit weird to not jump to hlt back again but ok.
The HLT is unlikely to come back anyways because interrupts
are off.
-Andi
next prev parent reply other threads:[~2006-07-05 13:10 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-05 11:44 [patch] i386: early pagefault handler Chuck Ebbert
2006-07-05 11:47 ` Ingo Molnar
2006-07-05 13:10 ` Andi Kleen [this message]
2006-07-05 16:38 ` H. Peter Anvin
2006-07-05 16:54 ` Linus Torvalds
2006-07-05 18:28 ` Alan Cox
2006-07-05 18:26 ` H. Peter Anvin
2006-07-05 18:41 ` Linus Torvalds
2006-07-05 20:24 ` Linus Torvalds
2006-07-07 2:06 ` Daniel Phillips
2006-07-07 2:51 ` H. Peter Anvin
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