Even if it's just a performance anomaly, these are good reports for kernel developers to have. If nothing else, it helps expand developers' understanding of the sorts of workloads people have had problems with. In the case of really complex systems, it can take a number of reports to spot the pattern, or in the case of proposed fixes, enough pains points to justify the risk of making a change. A report like this takes 60 seconds to cut and paste into an email to a mailing list. Or use the kernel.org bugzilla that is triaged by helpful volunteers. Every voice counts.