Re: kern/55397 (Xen pvh instance: zpool create on xbd* devices panics)

[Frank Kardel <kardel%netbsd.org@localhost>]

Looks promising:

    zpool create: sucess

    zfs create (several): sucess

    initial writes didn't panic.

Thanks for the quick fix!

Frank

On 06/19/20 16:26, Jaromír Doleček wrote:
> Hi,
>
> I've fixed the problem for zfs, you'll need an updated kernel
> (src/sys/kern/subr_pool.c) and the zfs module sources
> (src/external/....). Can you confirm it works for you?
>
> I can repeat the raidframe path too, I'm working on a fix there.
>
> Jaromir
>
> Le ven. 19 juin 2020 à 13:40, Frank Kardel <kardel%netbsd.org@localhost> a écrit :
> > Good.
> >
> > I found another subsystem triggering the assertion.
> >
> > Try "fdisk raidX" to panic like this:
> >
> > [ 300.6631030] panic: kernel diagnostic assertion "(req->req_bp->b_flags
> > & B_PHYS) != 0" failed: file
> > "/src/NetBSD/cur/src/sys/arch/xen/xen/xbd_xenbus.c", line 1373
> > [ 300.6631030] cpu2: Begin traceback...
> > [ 300.6631030] vpanic() at netbsd:vpanic+0x152
> > [ 300.6631030] __x86_indirect_thunk_rax() at netbsd:__x86_indirect_thunk_rax
> > [ 300.6631030] xbd_diskstart() at netbsd:xbd_diskstart+0x7c2
> > [ 300.6631030] dk_start() at netbsd:dk_start+0xef
> > [ 300.6730966] rf_DispatchKernelIO() at netbsd:rf_DispatchKernelIO+0x1a8
> > [ 300.6730966] rf_DiskIOEnqueue() at netbsd:rf_DiskIOEnqueue+0x103
> > [ 300.6730966] FireNodeList() at netbsd:FireNodeList+0x67
> > [ 300.6730966] rf_DispatchDAG() at netbsd:rf_DispatchDAG+0x12e
> > [ 300.6730966] rf_State_ExecuteDAG() at netbsd:rf_State_ExecuteDAG+0xcb
> > [ 300.6730966] rf_ContinueRaidAccess() at netbsd:rf_ContinueRaidAccess+0xb4
> > [ 300.6730966] rf_DoAccess() at netbsd:rf_DoAccess+0x10c
> > [ 300.6830965] raid_diskstart() at netbsd:raid_diskstart+0x100
> > [ 300.6830965] dk_start() at netbsd:dk_start+0xef
> > [ 300.6830965] rf_RaidIOThread() at netbsd:rf_RaidIOThread+0x142
> > [ 300.6830965] cpu2: End traceback...
> > [ 300.6830965] rebooting...
> >
> > Frank
> >
> >
> > On 06/19/20 11:10, jdolecek%NetBSD.org@localhost wrote:
> > > Synopsis: Xen pvh instance: zpool create on xbd* devices panics
> > >
> > > Responsible-Changed-From-To: kern-bug-people->jdolecek
> > > Responsible-Changed-By: jdolecek%NetBSD.org@localhost
> > > Responsible-Changed-When: Fri, 19 Jun 2020 09:10:34 +0000
> > > Responsible-Changed-Why:
> > > Mine. The assertion is there to catch cases which trigger non-optimal
> > > xbd I/O, to weed out those from kernel code. I'll check how is it
> > > triggered by zfs.