From: Pavel Machek <pavel@ucw.cz>
To: Rusty Russell <rusty@rustcorp.com.au>
Cc: akpm@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] Booting when CPUs fail to come up.
Date: Sat, 21 Feb 2004 14:33:59 +0100 [thread overview]
Message-ID: <20040221133359.GA339@elf.ucw.cz> (raw)
In-Reply-To: <20040221010811.2D3112C3A8@lists.samba.org>
Hi!
> > > I recently played with setting a bit in cpu_possible_map that wasn't
> > > in cpu_online_map: this can happen without hotplug CPU when a CPU
> > > fails to boot, for example.
> >
> > Is it safe to continue when one cpu is apparently malfunctioning?
>
> Well, patch was overzealous and no longer required.
>
> But we shouldn't crash when this happens just because a CPU didn't
> come up.
I still do not agree.
You have a system you tried to kick CPU #13 alive, and something very
wrong happened, CPU #13 did not come up. It is there, has full access
to memory, it is probably running some kind of program.... I'd not
dare mount disks read-write in such situation and I believe crashing
early is actually right thing to do.
Pavel
--
When do you have a heart between your knees?
[Johanka's followup: and *two* hearts?]
next prev parent reply other threads:[~2004-02-21 13:34 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-13 7:57 Rusty Russell
2004-02-20 16:10 ` Pavel Machek
2004-02-21 0:37 ` Rusty Russell
2004-02-21 13:33 ` Pavel Machek [this message]
2004-02-22 1:43 ` Rusty Russell
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