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Re: kern/50167: recent dksubr.c locking changes broke Xen
The following reply was made to PR kern/50167; it has been noted by GNATS.
From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
Subject: Re: kern/50167: recent dksubr.c locking changes broke Xen
Date: Sat, 29 Aug 2015 19:03:07 +0200
On Fri, Aug 28, 2015 at 08:05:01PM +0000, Michael van Elst wrote:
> The following reply was made to PR kern/50167; it has been noted by GNATS.
> From: mlelstv%serpens.de@localhost (Michael van Elst)
> To: gnats-bugs%netbsd.org@localhost
> Subject: Re: kern/50167: recent dksubr.c locking changes broke Xen
> Date: Fri, 28 Aug 2015 20:01:24 +0000 (UTC)
> bouyer%antioche.eu.org@localhost writes:
> > recent changes to locking in dksubr.c broke Xen, because
> > xbd(4) calls dk_start() from interrupt context:
> >(from http://www-soc.lip6.fr/~bouyer/NetBSD-tests/xen/HEAD/i386/201508230910Z_anita.txt)
> >mlock error: Mutex: mutex_vector_enter: locking against myself: lock 0xc129b09c cpu 0 lwp 0xc1505d40
> This is not interrupt context, but the start routine can call the done
> routine while locked. This should be fixed by now.
> Can you please verify?
The 2015-08-28 08:40 UTC build could run anita tests for both i386 and
amd64, so indeed it looks fixed.
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
NetBSD: 26 ans d'experience feront toujours la difference
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