>On 07/17/2017 08:00 AM, John Ferlan wrote:
> On 07/16/2017 05:04 PM, Laine Stump wrote:
>> On 07/11/2017 09:01 PM, ZhiPeng Lu wrote:
>>> This patchs allow to set the buffer size for netlink socket in
>>> the libvirtd configuration file. The default buffer size remain
>>> as before at 128k.
>> See my more detailed response to your earlier patch here:
>> There should be no need to configure the initial libnl buffer size,
>> because we enable MSG_PEEK on the libnl sockets (and recent versions of
>> libnl have it turned on by default anyway). If that's not permitting the
>> buffer to auto-grow as necessary, then there is a different bug somewhere.
>> If an old version of libnl is the problem, then perhaps a patch which
>> just adds a comment in virNetlinkCreateSocket to "summarize" what gets
>> discovered w/r/t MSG_PEEK and the "correct" minimum version of libnl so
> that the "next" person to come this way will have a chance at
>> understanding what needs to be done without going through the submit a
>> patch changing the size again!
> >All that said, having it be configurable could be useful for someone who
> >has a system that doesn't have that version, while still working as
> >expected for the right version.
>I think it may need to be a fairly unusual combination of kernel,
>libvirt, and libnl versions, combined with pretty "big" hardware in
>order for that to happen. More information from ZhiPeng about the
>versions of those packages might allow us to make a better informed
>Workarounds are okay when necessary. But adding a config parameter is
>something that would need to be left in forever, leaving more code to
>maintain, and all for a bug that shouldn't even be there today, much
>less 6 months or a year from now - turning on message peek was supposed
>to "eliminate this problem totally and permanently". If it didn't, I'd
>like to know why.
>ZhipPeng - can you tell us more about your setup? package versions,
>hardware, example XML, gdb backtrace at the instant the error message is
i will try to update libnl3 to 3.2.29 ,now libnl3 is 3.2.8 in my host
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