[libvirt] [PATCH] libxl: Create per-domain log file
Jim Fehlig
jfehlig at suse.com
Fri Aug 9 16:48:52 UTC 2013
Daniel P. Berrange wrote:
> On Thu, Aug 08, 2013 at 05:41:26PM -0600, Jim Fehlig wrote:
>
>> Currently, only one log file is created by the libxl driver, with
>> all output from libxl for all domains going to this one file.
>>
>> Create a per-domain log file based on domain name, making sifting
>> through the logs a bit easier. This required deferring libxl_ctx
>> allocation until starting the domain, which is fine since the
>> ctx is not used when the domain is inactive.
>> ---
>> src/libxl/libxl_conf.h | 5 +--
>> src/libxl/libxl_driver.c | 88 +++++++++++++++++++++++++++++-------------------
>> 2 files changed, 57 insertions(+), 36 deletions(-)
>>
>
> Startup of libvirtd SEGVs with this change in GIT
>
> ==4706== For counts of detected and suppressed errors, rerun with: -v
> ==4706== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 2 from 2)
> ==4601== Thread 12:
> ==4601== Invalid read of size 8
> ==4601== at 0x1E57964F: xtl_logv (in /usr/lib64/libxenctrl.so.4.2.0)
> ==4601== by 0x1E5796D3: xtl_log (in /usr/lib64/libxenctrl.so.4.2.0)
> ==4601== by 0x1E33258A: ??? (in /usr/lib64/libxenlight.so.2.0.0)
> ==4601== by 0x1E332641: ??? (in /usr/lib64/libxenlight.so.2.0.0)
> ==4601== by 0x1E317CD7: libxl_ctx_alloc (in /usr/lib64/libxenlight.so.2.0.0)
>
I should have looked at the xen code closer. Seems libxl doesn't cope
well with a NULL logger :(.
Hmm, should the logger for this driver-wide ctx (used for getting libxl
version and the like, no domain ops) just dump messages to /dev/null or
should they go to a driver-wide log file?
Regards,
Jim
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