Re: Xen 4.6.6-9 (with XPTI meltdown mitigation) packages making their way to centos-virt-xen-testing

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On 01/24/2018 01:01 AM, Pasi Kärkkäinen wrote:
> On Tue, Jan 23, 2018 at 06:20:39PM -0600, Kevin Stange wrote:
>> On 01/23/2018 05:57 PM, Karl Johnson wrote:
>>>
>>>
>>> On Tue, Jan 23, 2018 at 4:50 PM, Nathan March <nathan@xxxxxx
>>> <mailto:nathan@xxxxxx>> wrote:
>>>
>>>     Hi,
>>>
>>>     > Hmm.. isn't this the ldisc bug that was discussed a few months ago on this
>>>     list,
>>>     > and a patch was applied to virt-sig kernel aswell?
>>>     >
>>>     > Call trace looks similar..
>>>
>>>     Good memory! I'd forgotten about that despite being the one who ran
>>>     into it.
>>>
>>>     Looks like that patch was just removed in 4.9.75-30 which I just
>>>     upgraded
>>>     this system to: http://cbs.centos.org/koji/buildinfo?buildID=21122
>>>     <http://cbs.centos.org/koji/buildinfo?buildID=21122>
>>>     Previously I was on 4.9.63-29 which does not have this problem, and does
>>>     have the ldisc patch. So I guess the question is for Johnny, why was it
>>>     removed?
>>>
>>>     In the meantime, I'll revert the kernel and follow up if I see any
>>>     further
>>>     problems.
>>>
>>>
>>> IIRC the patch has been removed from the spec file because it has been
>>> merged upstream in 4.9.71.
>>
>> The IRC discussion I found in my log indicates that it was removed
>> because it didn't apply cleanly due to changes when updating to 4.9.75,
>> yet I don't think anyone independently validated that the changes made
>> are equivalent to the patch that was removed.  I was never able to
>> reproduce this issue, so I didn't investigate it myself.
>>
> 
> Sounds like the patch is still needed :)
> 
> Anyone up to re-porting it to 4.9.75+ ?

It looked, at first glance, like 4.9.71 fixed it .. I guess not in all cases



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