From: "H. Peter Anvin" <hpa@zytor.com>
To: Andi Kleen <ak@suse.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
olecom@flower.upol.cz, vgoyal@in.ibm.com, akpm@osdl.org,
rjw@sisk.pl, ebiederm@xmission.com,
Reloc Kernel List <fastboot@lists.osdl.org>,
pavel@suse.cz, magnus.damm@gmail.com
Subject: Re: [PATCH 20/20] x86_64: Move CPU verification code to common file
Date: Fri, 17 Nov 2006 22:41:44 -0800 [thread overview]
Message-ID: <455EAB28.9000500@zytor.com> (raw)
In-Reply-To: <20061118063802.GE30547@bingen.suse.de>
Andi Kleen wrote:
>> May hang be done optional? There was a discussion about applying
>> "panic" reboot timeout here. Is it possible to implement somehow?
>
> It would be tricky, but might be possible. But that would be a completely
> new feature -- the kernel has always hung in this case. If you think you need
> it submit a (followup) patch. But I don't think it's fair to ask Vivek to do it.
>
> Besides i don't think it would be any useful. panic reboot only
> makes sense if you can recover after reboot. But if your CPU somehow
> suddenly loses its ability to run 64bit code, no reboot of the world will
> recover.
>
Not true. Some bootloaders support a fallback kernel. This case is
particular important if one accidentally installs the wrong kernel for
the machine.
-hpa
next prev parent reply other threads:[~2006-11-18 6:42 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-17 22:34 [RFC][PATCH 0/20] x86_64: Relocatable bzImage (V3) Vivek Goyal
2006-11-17 22:36 ` [PATCH 1/20] x86_64: Align data segment to PAGE_SIZE boundary Vivek Goyal
2006-11-17 22:37 ` [PATCH 2/20] x86_64: Assembly safe page.h and pgtable.h Vivek Goyal
2006-11-18 8:49 ` Andi Kleen
2006-11-18 13:19 ` Vivek Goyal
2006-11-17 22:38 ` [PATCH 3/20] x86_64: Kill temp_boot_pmds Vivek Goyal
2006-11-17 22:39 ` [PATCH 4/20] x86_64: Cleanup the early boot page table Vivek Goyal
2006-11-17 22:40 ` [PATCH 5/20] x86_64: Fix early printk to use standard ISA mapping Vivek Goyal
2006-11-17 22:41 ` [PATCH 6/20] x86_64: Modify copy bootdata to use virtual addresses Vivek Goyal
2006-11-17 22:42 ` [PATCH 7/20] x86_64: cleanup segments Vivek Goyal
2006-11-17 22:44 ` [PATCH 8/20] x86_64: Add EFER to the set registers saved by save_processor_state Vivek Goyal
2006-11-18 0:11 ` Pavel Machek
2006-11-17 22:45 ` [PATCH 9/20] x86_64: 64bit PIC SMP trampoline Vivek Goyal
2006-11-18 0:27 ` Pavel Machek
2006-11-18 0:33 ` Vivek Goyal
2006-11-18 0:38 ` Pavel Machek
2006-11-17 22:47 ` [PATCH 10/20] x86_64: wakeup.S Remove dead code Vivek Goyal
2006-11-18 0:14 ` Pavel Machek
2006-11-17 22:48 ` [PATCH 11/20] x86_64: wakeup.S Rename labels to reflect right register names Vivek Goyal
2006-11-18 0:15 ` Pavel Machek
2006-11-17 22:49 ` [PATCH 12/20] x86_64: wakeup.S Misc cleanup Vivek Goyal
2006-11-18 0:19 ` Pavel Machek
2006-11-18 1:25 ` Vivek Goyal
2006-11-17 22:51 ` [PATCH 13/20] x86_64: 64bit PIC ACPI wakeup trampoline Vivek Goyal
2006-11-18 0:20 ` Pavel Machek
2006-11-17 22:52 ` [PATCH 14/20] x86_64: Modify discover_ebda to use virtual address Vivek Goyal
2006-11-17 22:54 ` [PATCH 15/20] x86_64: Remove the identity mapping as early as possible Vivek Goyal
2006-11-17 22:55 ` [PATCH 16/20] x86_64: __pa and __pa_symbol address space separation Vivek Goyal
2006-11-17 22:56 ` [PATCH 17/20] x86_64: Remove CONFIG_PHYSICAL_START Vivek Goyal
2006-11-18 1:14 ` Magnus Damm
2006-11-18 2:45 ` Vivek Goyal
2006-11-20 10:02 ` Magnus Damm
2006-11-17 22:57 ` [PATCH 18/20] x86_64: Relocatable kernel support Vivek Goyal
2006-11-18 5:49 ` Oleg Verych
2006-11-18 6:49 ` Andi Kleen
2006-11-17 22:58 ` [PATCH 19/20] x86_64: Extend bzImage protocol for relocatable kernel Vivek Goyal
2006-11-18 0:30 ` H. Peter Anvin
2006-11-18 0:37 ` Vivek Goyal
2006-11-18 0:45 ` H. Peter Anvin
2006-11-18 1:47 ` Vivek Goyal
2006-11-17 22:59 ` [PATCH 20/20] x86_64: Move CPU verification code to common file Vivek Goyal
2006-11-18 5:21 ` Oleg Verych
2006-11-18 6:38 ` Andi Kleen
2006-11-18 6:41 ` H. Peter Anvin [this message]
[not found] ` <20061118070101.GA14673@flower.upol.cz>
2006-11-18 6:59 ` H. Peter Anvin
2006-11-18 7:22 ` Oleg Verych
2006-11-18 7:32 ` H. Peter Anvin
2006-11-18 8:10 ` reboot, not loop forever (Re: [PATCH 20/20] x86_64: Move CPU verification code to common file) Oleg Verych
2006-11-18 8:06 ` [PATCH 20/20] x86_64: Move CPU verification code to common file Andi Kleen
2006-11-18 8:16 ` H. Peter Anvin
2006-11-18 8:29 ` Andi Kleen
2006-11-18 10:55 ` Paul Mackerras
2006-11-18 10:58 ` Andi Kleen
2006-11-18 12:59 ` Vivek Goyal
2006-11-18 17:46 ` Pavel Machek
2006-11-18 8:52 ` [RFC][PATCH 0/20] x86_64: Relocatable bzImage (V3) Andi Kleen
2006-11-18 13:14 ` Vivek Goyal
-- strict thread matches above, loose matches on Subject: below --
2007-03-07 6:57 [PATCH 0/20] x86_64 Relocatable bzImage support (V4) Vivek Goyal
2007-03-07 7:25 ` [PATCH 20/20] x86_64: Move cpu verification code to common file Vivek Goyal
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