Xen 4.5 migration blows up.

Xen 4.5 migration blows up.

[Konrad Rzeszutek Wilk]

Hey Ian,

I keep on seeing this when trying to a migration with the upstream
Linux:
xc: progress: Saving memory: iter 0 (last sent 0 skipped 0): 941056/1045504   90%
xc: progress: Saving memory: iter 0 (last sent 0 skipped 0): 993280/1045504   95%
xc: progress: Saving memory: iter 0 (last sent 0 skipped 0): 1045504/1045504  100%
libxl-save-helper: xc_domain_save.c:2045: xc_domain_save: Assertion `rc' failed.
libxl: error: libxl_utils.c:396:libxl_read_exactly: file/stream truncated reading ipc msg header from domain 5 save/restore helper stdout pipe
libxl: error: libxl_exec.c:129:libxl_report_child_exitstatus: domain 5 save/restore helper [-1] died due to fatal signal Aborted
Failed to save domain, resuming domain
bootstrap-i386-pvhvm could not be saved (rc:1)!

I am thinking to do a bisect to narrow down the exact one, but is there
a particular one you think I ought to focus on?

Thanks!

Re: Xen 4.5 migration blows up.

[Ian Campbell]

On Fri, 2014-03-14 at 12:47 -0400, Konrad Rzeszutek Wilk wrote:
> Hey Ian,
> 
> I keep on seeing this when trying to a migration with the upstream
> Linux:
> xc: progress: Saving memory: iter 0 (last sent 0 skipped 0): 941056/1045504   90%
> xc: progress: Saving memory: iter 0 (last sent 0 skipped 0): 993280/1045504   95%
> xc: progress: Saving memory: iter 0 (last sent 0 skipped 0): 1045504/1045504  100%
> libxl-save-helper: xc_domain_save.c:2045: xc_domain_save: Assertion `rc' failed.
> libxl: error: libxl_utils.c:396:libxl_read_exactly: file/stream truncated reading ipc msg header from domain 5 save/restore helper stdout pipe
> libxl: error: libxl_exec.c:129:libxl_report_child_exitstatus: domain 5 save/restore helper [-1] died due to fatal signal Aborted
> Failed to save domain, resuming domain
> bootstrap-i386-pvhvm could not be saved (rc:1)!
> 
> I am thinking to do a bisect to narrow down the exact one, but is there
> a particular one you think I ought to focus on?

This was one of Olaf's patches from yesterday. Fixed last night or this
morning in staging I beleive.

> 
> Thanks!

Re: Xen 4.5 migration blows up.

[Andrew Cooper]

On 14/03/14 16:52, Ian Campbell wrote:
> On Fri, 2014-03-14 at 12:47 -0400, Konrad Rzeszutek Wilk wrote:
>> Hey Ian,
>>
>> I keep on seeing this when trying to a migration with the upstream
>> Linux:
>> xc: progress: Saving memory: iter 0 (last sent 0 skipped 0): 941056/1045504   90%
>> xc: progress: Saving memory: iter 0 (last sent 0 skipped 0): 993280/1045504   95%
>> xc: progress: Saving memory: iter 0 (last sent 0 skipped 0): 1045504/1045504  100%
>> libxl-save-helper: xc_domain_save.c:2045: xc_domain_save: Assertion `rc' failed.
>> libxl: error: libxl_utils.c:396:libxl_read_exactly: file/stream truncated reading ipc msg header from domain 5 save/restore helper stdout pipe
>> libxl: error: libxl_exec.c:129:libxl_report_child_exitstatus: domain 5 save/restore helper [-1] died due to fatal signal Aborted
>> Failed to save domain, resuming domain
>> bootstrap-i386-pvhvm could not be saved (rc:1)!
>>
>> I am thinking to do a bisect to narrow down the exact one, but is there
>> a particular one you think I ought to focus on?
> This was one of Olaf's patches from yesterday. Fixed last night or this
> morning in staging I beleive.

Fixed by
http://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff;h=29f0712bc008a9d6e611785424f797cfc185c1d3
"tools/libxc: fix errno handling for HVM in xc_domain_save"

~Andrew

Re: Xen 4.5 migration blows up.

[Konrad Rzeszutek Wilk]

On Fri, Mar 14, 2014 at 05:11:25PM +0000, Andrew Cooper wrote:
> On 14/03/14 16:52, Ian Campbell wrote:
> > On Fri, 2014-03-14 at 12:47 -0400, Konrad Rzeszutek Wilk wrote:
> >> Hey Ian,
> >>
> >> I keep on seeing this when trying to a migration with the upstream
> >> Linux:
> >> xc: progress: Saving memory: iter 0 (last sent 0 skipped 0): 941056/1045504   90%
> >> xc: progress: Saving memory: iter 0 (last sent 0 skipped 0): 993280/1045504   95%
> >> xc: progress: Saving memory: iter 0 (last sent 0 skipped 0): 1045504/1045504  100%
> >> libxl-save-helper: xc_domain_save.c:2045: xc_domain_save: Assertion `rc' failed.
> >> libxl: error: libxl_utils.c:396:libxl_read_exactly: file/stream truncated reading ipc msg header from domain 5 save/restore helper stdout pipe
> >> libxl: error: libxl_exec.c:129:libxl_report_child_exitstatus: domain 5 save/restore helper [-1] died due to fatal signal Aborted
> >> Failed to save domain, resuming domain
> >> bootstrap-i386-pvhvm could not be saved (rc:1)!
> >>
> >> I am thinking to do a bisect to narrow down the exact one, but is there
> >> a particular one you think I ought to focus on?
> > This was one of Olaf's patches from yesterday. Fixed last night or this
> > morning in staging I beleive.
> 
> Fixed by
> http://xenbits.xen.org/gitweb/?p=xen.git;a=commitdiff;h=29f0712bc008a9d6e611785424f797cfc185c1d3
> "tools/libxc: fix errno handling for HVM in xc_domain_save"
> 

AHA! Thank you folks!

> ~Andrew