From: Ingo Molnar <mingo@elte.hu>
To: Keir Fraser <keir.fraser@eu.citrix.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: Re: [PATCH] x86: fix the potential of encountering panic "IO-APIC + timer doesn't work! ..."
Date: Fri, 12 Dec 2008 10:24:41 +0100 [thread overview]
Message-ID: <20081212092441.GJ25106@elte.hu> (raw)
In-Reply-To: <C567DE15.20269%keir.fraser@eu.citrix.com>
* Keir Fraser <keir.fraser@eu.citrix.com> wrote:
> On 12/12/2008 09:13, "Ingo Molnar" <mingo@elte.hu> wrote:
>
> >>> From all I can tell, the below reproduced full description of the
> >> original Linux patch applies to Xen, too - at least in the watchdog
> >> enabled case IRQs can be enabled when entering setup_IO_APIC(). My
> >> attention to this change really got caught just by the fact that it got
> >> added to our (2.6.16-based) SLE10 kernel pretty recently.
> >
> > note that we had to revert that eventually. The real solution is an
> > array of fixes from Maciej spread out over many months.
>
> Does it do more harm than good on some systems, or is it simply not a
> comprehensive fix?
more harm than good - fixes some, breaks others. Have a look at the
latest upstream io_apic.c, that has it all settled down reasonably well.
Ingo
next prev parent reply other threads:[~2008-12-12 9:24 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-11 10:39 [PATCH] x86: fix the potential of encountering panic "IO-APIC + timer doesn't work! ..." Jan Beulich
2008-12-11 11:14 ` Keir Fraser
2008-12-12 9:13 ` Ingo Molnar
2008-12-12 9:23 ` Keir Fraser
2008-12-12 9:24 ` Ingo Molnar [this message]
2008-12-12 9:37 ` Keir Fraser
2008-12-12 9:54 ` Re: [PATCH] x86: fix the potential of encounteringpanic " Jan Beulich
2008-12-12 9:50 ` [PATCH] x86: fix the potential of encountering panic "IO-APIC+ " Jan Beulich
2008-12-12 10:06 ` Ingo Molnar
2008-12-12 10:37 ` Keir Fraser
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