Re: dk for z/lvm volumes?

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

On Sat, 29 Feb 2020 at 06:47, Michael van Elst <mlelstv%serpens.de@localhost> wrote:
>
> On Fri, Feb 28, 2020 at 02:12:29PM +0000, Chavdar Ivanov wrote:
> > On Thu, 27 Feb 2020 at 20:41, Michael van Elst <mlelstv%serpens.de@localhost> wrote:
> > > I've prepared a patch for -current that fixes this issue.
> > > http://ftp.netbsd.org/pub/NetBSD/misc/mlelstv/zvol.patch
> >
> > After applying the patch, rebuilding and upgrading the whole system,
> > now net/istgt reliably crashes the whole system:
>
> With lots of things changed it is difficult to identify the reason.
> Does it still crash when you now remove that patch (only that patch) ?

No, istgt works after reverting.

>
> > fatal integer divide fault in supervisor mode
> >  trap type 8 code 0 rip 0xffffffff80abd3bf cs 0x8 rflags 0x10246 cr2
> > 0x7931f26ff000 ilevel 0 rsp 0xffffbf8197b93db0
>
> Please use the addr2line tool to find out what source line the
> address 0xffffffff80abd3bf corresponds to.

addr2line didn't return anything (most likely I was invoking it wrong,
I don't know).

gdb points to spec_read:

(gdb) target kvm netbsd.12.core
0xffffffff80224225 in cpu_reboot ()
(gdb) bt
#0  0xffffffff80224225 in cpu_reboot ()
#1  0xffffffff809fde2f in kern_reboot ()
#2  0xffffffff80a40299 in vpanic ()
#3  0xffffffff80a4035d in panic ()
#4  0xffffffff8022669d in trap ()
#5  0xffffffff8021ed43 in alltraps ()
#6  0xffffffff80abd3bf in spec_read ()
#7  0xffffffff80ab0d6e in VOP_READ ()
#8  0xffffffff80aa8025 in vn_read ()
#9  0xffffffff80a4df87 in dofileread ()
#10 0xffffffff80a4e04f in sys_read ()
#11 0xffffffff80255cb9 in syscall ()
#12 0xffffffff802096ad in handle_syscall ()



>
>
> Greetings,
> --
>                                 Michael van Elst
> Internet: mlelstv%serpens.de@localhost
>                                 "A potential Snark may lurk in every tree."



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