Bezüglich Harry Schmalzbauer's Nachricht vom 11.06.2017 12:37 (localtime):
> Bezüglich Harry Schmalzbauer's Nachricht vom 06.06.2017 14:03 (localtime):
>> Hello,
>>
>> suddenly, I'm getting this error:
>> /lib/libc.so.7: Undefined symbol "xdr_accepted_reply"
>>
>> Very mysterious: It showed up on a running system, which worked
>> flawlessly for some hours. And that host has root-fs (/) mounted
>> readonly from a memorydisk. So to my understanding, it's completely
>> impossible that /lib/libc.so.7 is corrupted since last boot.
>>
>> I'm completely out of ideas what could cause this strange error during
>> "normal" operation.
>>
>> Normal operation in this case is serving as a bhyve test machine.
>> I first noticed that error after one guest - with passthru device
>> attached - was shut down.
>>
>> My suspicion is some undiscovered passthru interference... Since I
>> noticed one other _very_ strange passthru-effect:
>> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=215740
> Hello,
>
> this time I caught a panic with a debuging kernel under 11.1-BETA1,
> which again occured after shuting down a VM which had ppt in use:
>
…
> Please, can anybody of the xperts add a comment?
It turned out that it's a problem with PCIe cards which don't support
FLR or cards, which are not PCIe, even if they have FLR capabilitiy.
jhb@ helped me to diagnose this.
Unfortunately I once forgot to manually bring down the passthrough-nics
in question, which resulted in a completely destroyed ZFS pool.
That hurted, so I won't rely on manual intervention before shutting down
(I had to recreate the complete (system) pool).
Unfortunately my skills don't allow me to help fixing the root cause, so
I created a little rc(8) script, which should protect reliably.
Please see also https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=222937
Since it's quite small overhead, I'll also attach it here (to be copied
to /etc/rc.d).
-harry
#!/bin/sh
#
# PROVIDE: pciptdetach
# REQUIRE: swap
# BEFORE: devd
# KEYWORD: shutdown
. /etc/rc.subr
name=pciptdetach
rcvar=pciptdetach_enable
load_rc_config ${name}
: ${pciptdetach_enable:="YES"}
start_cmd="true"
stop_cmd="${name}"
pciptdetach()
{
sysctl -n hw.hv_vendor | grep -q bhyve || return 0
echo "Disabling passthrough adapters:"
pptcandidate=`pciconf -l | grep -v -E \
"^([[:blank:]]|hostb|virtio|isab)[^@]+" | sed -n -E \
's/^[[:blank:]]*(^[[:alnum:]]+)@([^[:blank:]]+)(:[[:blank:]]).*$/\2/p'`
for pcidev in ${pptcandidate}; do
drv_class=`pciconf -lv | grep -A 3 "@${pcidev}" | sed -n -E -e \
's/^[[:blank:]]*class[[:blank:]]+=[[:blank:]]+([^[:blank:]].*)$/\1/p' \
-e 's/^([[:alnum:]]+)@.*$/\1/p' | tr '\n' ' '`
# Don't disable mass storage devices, might be busy for shutdown
[ X"${drv_class}" = X"${drv_class%mass storage*}" ] || continue
# Make sure network adapters don't have active vlan(4) clones.
if [ -z "${netstoped}" ] &&
[ X"${drv_class}" != X"${drv_class%network*}" ]
then
/etc/rc.d/netif stop >/dev/null 2>&1 && netstoped=y
fi
# Non-PCIe devices and PCIe devices without FLR support are
# known to cause RAM corruption.
if ! pciconf -lc ${pcidev} | grep -A 20 PCI-Express |
grep -q "[[:blank:]]FLR"
then
devctl disable ${pcidev} >/dev/null 2>&1 ||
echo " ${drv_class%% *}:FAILED"
fi
done
}
run_rc_command "$1"
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