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

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

The following reply was made to PR kern/55397; it has been noted by GNATS.

From: Frank Kardel <kardel%netbsd.org@localhost>
To: gnats-bugs%netbsd.org@localhost, jdolecek%netbsd.org@localhost, kern-bug-people%netbsd.org@localhost,
 netbsd-bugs%netbsd.org@localhost, gnats-admin%netbsd.org@localhost
Cc: 
Subject: Re: kern/55397 (Xen pvh instance: zpool create on xbd* devices
 panics)
Date: Fri, 19 Jun 2020 13:40:26 +0200

 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.
 >
 >
 >