Date: Sat, 29 Aug 2009 23:57:23 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: Andreas Tobler <andreast-list@fgznet.ch> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: Boot panic -CURRENT #196643 Message-ID: <20090829205723.GW1881@deviant.kiev.zoral.com.ua> In-Reply-To: <4A999344.5000703@fgznet.ch> References: <4A997442.1060200@fgznet.ch> <20090829183906.GS1881@deviant.kiev.zoral.com.ua> <4A9988ED.2040403@fgznet.ch> <20090829201614.GU1881@deviant.kiev.zoral.com.ua> <4A999344.5000703@fgznet.ch>
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On Sat, Aug 29, 2009 at 10:44:52PM +0200, Andreas Tobler wrote:
> Kostik Belousov wrote:
> >On Sat, Aug 29, 2009 at 10:00:45PM +0200, Andreas Tobler wrote:
> >>Kostik Belousov wrote:
> >>>On Sat, Aug 29, 2009 at 08:32:34PM +0200, Andreas Tobler wrote:
> >>>>Hello,
> >>>>
> >>>>I synced the sources today to #196643.
> >>>Try 196644.
> >>[tc:head/src/sys] andreast% svn info
> >>Path: .
> >>URL: svn://svn.freebsd.org/base/head/sys
> >>Repository Root: svn://svn.freebsd.org/base
> >>Repository UUID: ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
> >>Revision: 196644
> >>Node Kind: directory
> >>Schedule: normal
> >>Last Changed Author: kib
> >>Last Changed Rev: 196644
> >>Last Changed Date: 2009-08-29 20:01:02 +0200 (Sat, 29 Aug 2009)
> >>
> >>Still the same, as below.
> >>
> >>But with WITNESS etc. on:
> >>
> >>I get this panic:
> >>---
> >>Trying to mount root from zfs:zroot
> >>panic: thread_alloc got thread with kstack
> >>cpuid =3D 0
> >>KDB: enter: panic
> >>[thread pid 1 tid 100002 ]
> >>Stopped at kdb_enter+0x3a: movl $0,kdb_why
> >Can you show me the backtrace (from ddb) ?
>=20
> I would like, yes, but as I said, the keyboard is not functional at this=
=20
> moment, it would be activated after this mount.
>=20
> Do I have other possibilties to get in connection with this machine?
>=20
>=20
>=20
> >>>>And built a kernel with WITNESS etc. off.
> >>>>
> >>>>My boot partition sits on zfs.
> >>>>
> >>>>I get the below panic. Unfortunately I can't bt since the usb keyboar=
d=20
> >>>>ist not functional at this moment.
> >>>>
> >>>>---
> >>>>Trying to mount root from zfs:zroot
> >>>>spin lock 0x80dccc00 (sched lock 1) held by 0x8595baf0 (tid 100003) t=
oo=20
> >>>>long
> >>>>panic: spin lock held too long
> >>>>cpuid =3D 0
> >>>>KDB: enter: panic
> >>>>[thread pid 1 tid 100002 ]
> >>>>Stopped at kdb_enter+0x3a: movl $0,kdb_why
> >>>>---
> >>>>
> >>>>Unfortunately I can't say exactly which version the previous, working=
,=20
> >>>>kernel has. The svn nbr has gone. (I have this subversion:
> >>>>subversion-freebsd-1.6.5)
> >>This question is still open.
> >
> >r196639 will work for you.
>=20
> :) I'll need a quick eye on it then.
Please, try this.
diff --git a/sys/vm/vm_glue.c b/sys/vm/vm_glue.c
index 234cde9..b0e8d3c 100644
--- a/sys/vm/vm_glue.c
+++ b/sys/vm/vm_glue.c
@@ -447,6 +447,8 @@ vm_thread_dispose(struct thread *td)
pages =3D td->td_kstack_pages;
ksobj =3D td->td_kstack_obj;
ks =3D td->td_kstack;
+ td->td_kstack =3D 0;
+ td->td_kstack_pages =3D 0;
if (pages =3D=3D KSTACK_PAGES && kstacks <=3D kstack_cache_size) {
ks_ce =3D (struct kstack_cache_entry *)ks;
ks_ce->ksobj =3D ksobj;
@@ -457,8 +459,6 @@ vm_thread_dispose(struct thread *td)
return;
}
vm_thread_stack_dispose(ksobj, ks, pages);
- td->td_kstack =3D 0;
- td->td_kstack_pages =3D 0;
}
=20
static void
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