Red Hat Bugzilla – Bug 615187
Call trace in rhel6 PV guest after doing "xm save" failure.
Last modified: 2011-04-20 08:36:19 EDT
Created attachment 432302 [details]
Description of problem:
After doing rhel6 pv guest save failure, rhel6 pv guest will call trace and hang.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1.Create the rhel6 pv guest: xm create rhel6-pv-latest -c
2.save this guest to small disk: xm save rhel6-pv-latest /mnt/save_fail
There is call trace in rhel6 PV guest and guest will hang.
Rhel6 PV guest will run normal and you can operate this guest all the time.
Please see the attachment: rhel6_call_trace.txt
rhel6-pv-latest.txt (guest config file)
Created attachment 432303 [details]
Created attachment 432305 [details]
question to reporter or xen user space guys: do RHEL5 guests recover from failed saves fine?
I try this on rhel5 pv guest, when doing save failure on rhel5.5 pv guest, this guest can run normally and I can do other operation in this guest.
Retest it again, this issue occurs on i386 platfrom.
Andrew: Yeah, now it does. From the xend.log I was seeing "errno 28" which is failure because of low disk space which is change because for me I saw "errno 0" for RHEL-5 i386 guest. Nevertheless, the RHEL-5 i386 guest I tested was working successfully when resumed from the failed save (at least according to my testing). This was tested on x86_64 RHEL-5 host.
Also, the "arch/x86/xen/enlighten.c:169" in the call trace is present only in the recent pv-ops kernels like you told me... Could what's present on line 169 in this file of RHEL-6 kernel then?
It looks like we may need to fix this in the rhel6 kernel, possible also a change in the rhel5 HV. In any respect it's too late for 6.0 to fix this as it's an error path and not a critical blocker. Moving to kernel component and slating for 6.1.
This request was evaluated by Red Hat Product Management for
inclusion in the current release of Red Hat Enterprise Linux.
Because the affected component is not scheduled to be updated
in the current release, Red Hat is unfortunately unable to
address this request at this time. Red Hat invites you to
ask your support representative to propose this request, if
appropriate and relevant, in the next release of Red Hat
Enterprise Linux. If you would like it considered as an
exception in the current release, please ask your support
This request was erroneously denied for the current release of Red Hat
Enterprise Linux. The error has been fixed and this request has been
re-proposed for the current release.
This request was erroneously denied for the current release of
Red Hat Enterprise Linux. The error has been fixed and this
request has been re-proposed for the current release.
This would be fixed by suspend cancellation, we are not going to fix it in the guest.
*** This bug has been marked as a duplicate of bug 618569 ***