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Dario Faggioli
04497b354f
There is a bug in commit5e4b419966("xen: credit2: only reset credit on reset condition"). In fact, the aim of that commit was to make sure that we do not perform too many credit reset operations (which are not super cheap, and in an hot-path). But the check used to determine whether a reset is necessary was the wrong one. In fact, knowing just that some vCPUs have been skipped, while traversing the runqueue (in runq_candidate()), is not enough. We need to check explicitly whether the first vCPU in the runqueue has a negative amount of credit. Since a trace record is changed, this patch updates xentrace format file and xenalyze as well This should be backported. Signed-off-by: Dario Faggioli <dfaggioli@suse.com> Acked-by: George Dunlap <george.dunlap@citrix.com> master commit:dae7b62e97master date: 2020-04-03 10:46:53 +0200