On Thu, 7 Dec 2023 16:42:59 -0800 Nhat Pham <nphamcs@xxxxxxxxx> wrote: > > > > Also, it would be quite helpful of the changelog were to give us some > > idea of how important this tunable is. What sort of throughput > > differences might it cause and under what circumstances? > > For the most part, this feature is motivated by internal parties who > have already established their opinions regarding swapping - the > workloads that are highly sensitive to IO, and especially those who > are using servers with really slow disk performance (for instance, > massive but slow HDDs). For these folks, it's impossible to convince > them to even entertain zswap if swapping also comes as a packaged > deal. Writeback disabling is quite a useful feature in these > situations - on a mixed workloads deployment, they can disable > writeback for the more IO-sensitive workloads, and enable writeback > for other background workloads. > > (Maybe we should include the paragraph above as part of the changelog?) I pasted it in, thanks.
