On Tue, Jan 27, 2015 at 06:10:31PM -0500, Paul Gortmaker wrote:
> Hi Greg,
>
> Someone working on a 3.10.x based -rt kernel traced a latency increase
> back to the backport of 56cc2406d68c0f0950 ("KVM: nVMX: fix "acknowledge
> interrupt on exit" when APICv is in use"). When they asked me for
> assistance, I noticed that the commit had:
>
> Fixes: 77b0f5d67ff2781f36831cba79674c3e97bd7acf
>
> ...but 77b0f5 only appeared in v3.16-rc4~21^2^2~32. Checking the stable
> queue, it seems that it was added to 3.10.54, 3.14.18 and 3.16.2 -- but if
> the Fixes tag is to be believed, then only 3.16.x should have this applied.
>
> I also checked to see if stable [you] backported 77b0f5d67ff to any
> versions, thus expanding its applicability, but it/you had not.
>
> Obviously a kernel based on -rt won't behave the same as vanilla stable
> but regardless I figured I'd mention the discrepancy I found above since
> it might cause issues for other people on the stable kernels as well.
I have no idea, I did that back in August, I can't remember what I
applied last week :(
Do you think I should revert it? It doesn't seem to have caused any
problems, as no one has noticed any issues...
thanks,
greg k-h
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