Re: [Xen-devel] Prepping a bugfix push

[Brendan Cully <brendan@xxxxxxxxx>]

On Thursday, 03 December 2009 at 17:10, Jeremy Fitzhardinge wrote:
> On 12/03/09 16:24, Brendan Cully wrote:
> >On Thursday, 03 December 2009 at 15:22, Jeremy Fitzhardinge wrote:
> >>On 12/03/09 11:35, Brendan Cully wrote:
> >>>Not a patch, but I've just tried out xm save -c again with the latest
> >>>xen changes, and while I no longer see the grant table version panic,
> >>>the guest's devices (aside from the console) appear to be wedged on
> >>>resume. Is anyone else seeing this?
> >>>
> >>>After a while on the console I see messages like this:
> >>>
> >>>INFO: task syslogd:2219 blocked for more than 120 seconds.
> >>>
> >>>which I assume is trouble with the block device.
> >>Is there any backtrace or other info associated with this?
> >I take it you couldn't reproduce? Let me know what you want
> >captured. In the meantime, here's the kernel log:
> 
> Nope, works for me :)  Ian has been doing testing with hundreds or
> thousands of suspend/resumes, so it *can* be reliable.
> 
> That said, I am seeing some odd hangs after suspend/resume with the
> bugfix branch merged into Linux mainline...
> 
> Can you ping the domain when its in that state?

Nope. If it matters, my environment is 64-bit xen, 32-bit 2.6.18 dom0,
both the latest HG.

Here's a diff of xenstore-ls before and after xm save -c, which
doesn't say much. I don't know why that VBD ring-ref is changing
though.

--- xs-presuspend.txt   2009-12-03 20:25:51.419603196 -0800
+++ xs-postsuspend.txt  2009-12-03 20:26:20.604309769 -0800
@@ -96,7 +96,7 @@
       backend-id = "0"
       state = "4"
       backend = "/local/domain/0/backend/vbd/18/51713"
-      ring-ref = "8"
+      ring-ref = "101"
       event-channel = "9"
     vif = ""
      0 = ""
@@ -121,6 +121,7 @@
       backend = "/local/domain/0/backend/console/18/0"
    control = ""
     platform-feature-multiprocessor-suspend = "1"
+    shutdown = ""
    error = ""
    memory = ""
     target = "262144"
@@ -223,7 +224,8 @@
   on_crash = "restart"
   xend = ""
    restart_count = "0"
+   last_shutdown_reason = "suspend"
   vcpus = "1"
   vcpu_avail = "1"
   bootloader = ""
-  name = "p32"
+  name = "migrating-p32"

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