On Mon, Nov 05, 2018 at
12:57 PM, Wei Liu wrote:
On Mon, Nov 05, 2018 at 11:58:09AM +0200, Alexandru Vasile wrote:
Hello,
(XEN) event_channel.c:319:d0v1 EVTCHNOP failure: domain 1, error -22
(XEN) event_channel.c:319:d0v3 EVTCHNOP failure: domain 1, error -22
Do you perhaps have more than one xenstored / xenconsoled running?
The processes listed by 'ps -aux | grep xen'
immediately after dom0 boots are oxenstored, xenconsoled and
xenwatchdogd.
I did start 'xencommons ' from my install folder
due to xl showing the name of Dom0 as '(null)' and also because
of a difference in output error from xl when creating a HVM DomU
with passthrough (the output is captured in files
xl_output_clean[0] and xl_output_xencommons[1]).
(XEN) Assertion 'fdom != p2m->domain' failed at p2m.c:504
You can work around this with:
---8<---
From 9437054299c1d360eb4fedd065d51965e560fc0c Mon Sep 17 00:00:00 2001
From: Wei Liu <wei.liu2@xxxxxxxxxx>
Date: Fri, 2 Nov 2018 14:55:04 +0000
Subject: [PATCH] DROP DONT POST
---
xen/arch/x86/mm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index f043e43ac7..9c154783e4 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -4443,7 +4443,7 @@ int arch_acquire_resource(struct domain *d, unsigned int type,
switch ( type )
{
-#ifdef CONFIG_HVM
+#if 0
case XENMEM_resource_ioreq_server:
{
ioservid_t ioservid = id;
--
2.11.0
Thank you, after applying this patch dom0 no
longer freezes or reboots, therefore I was able to capture all
the error messages from the 'xl create' command [0] [1].
Another problem that I discovered while
investigating pci passthrough is that Dom0 randomly freezes. I
encountered this problem multiple times, but on two occasions I
was able to capture the output form the serial console: the
problem will reset dom0 after 5 seconds [2] or will cause the
system to never reset [3].
I later applied the patch from [4] as seeing
this is a recurrent problem, but I could not reproduce the bug
even when stressing the system.
Thanks, Alex.
[0] see 'xl_output_clean' from attached files -
the output of xl create HVM Dom0 before manually starting
xencommon
[1]
see 'xl_output_xencommons'
from attached files - the output of xl create HVM Dom0 after
manually starting xencommon
[2] see 'dom0_freeze' form
attached files - reset after freeze
[3] see 'dom0_freeze_loop' form
attached files - a reset is not performed after freeze
[4]
https://lists.xenproject.org/archives/html/xen-devel/2016-01/msg02753.html
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