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.
Thanks,
Paul.
--
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html