Re: loopback blockdev deadlocks -- explained?

From: Mike Galbraith (mikeg@weiden.de)
Date: Tue Apr 18 2000 - 09:27:29 EST


On Tue, 18 Apr 2000, Tigran Aivazian wrote:

> On Tue, 18 Apr 2000, Mike Galbraith wrote:
>
> > On Mon, 17 Apr 2000, Tigran Aivazian wrote:
> >
> > > On Mon, 17 Apr 2000, Stephen C. Tweedie wrote:
> > >
> > > > No, the last version I tried went fine but I haven't used it on a
> > > > particularly recent 2.3 kernel.
> > >
> > > just to let everyone know - I tried the kdb-v1.1-2.3.48 from
> > > SGI www.oss.sgi.com against 2.3.99-pre6-3 on SMP and it works just fine
> > > (the modifications I had to make were trivial).
> >
> > Can you show me what mods you had to make to get it to work SMP?
> > I merged kdb-1.1 into IKD and submitted a 2.3.99-pre6-3 diff to
> > Andrea for review.. but don't have an SMP box.
> >
> > -Mike
>
> yes, sure:
>
> --- linux/arch/i386/kernel/smp.c Tue Apr 18 08:56:43 2000
> +++ work/arch/i386/kernel/smp.c Mon Apr 17 21:44:59 2000
> @@ -146,7 +146,7 @@
> /*
> * Setup KDB IPI to be delivered as an NMI
> */
> - cfg = (cfg&~APIC_DEST_DM_MASK)|APIC_DEST_DM_NMI;
> + cfg = (cfg&~APIC_DM_EXTINT)|APIC_DM_NMI;
> }
> #endif /* CONFIG_KDB */

Thanks.. same thing I did here. (hmm.. methinks Maciej is right,
but then again, why is APIC_DM_EXTINT a mask?)

        -Mike

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