On Thu, 2020-10-22 at 13:43 -0700, Flavio Veloso wrote: > Package: linux-image-cloud-amd64 > Version: 4.19+105+deb10u7 > Severity: wishlist > > Since cloud images are mostly run for server workloads in headless > environments accessed via network only, it would be better if > "linux-image-cloud-*" kernels were compiled with CONFIG_PREEMPT_NONE=y > ("No Forced Preemption (Server)"). > > Currently those packages use CONFIG_PREEMPT_VOLUNTARY=y ("Voluntary > Kernel Preemption (Desktop)") > > CONFIG_PREEMPT_NONE description from kernel help: [...]
I know what it says, but I think the notion that latency is less important on servers is outdated. It's well known that people give up quickly on web pages that are slow to load: <https://www.gigaspaces.com/blog/amazon-found-every-100ms-of-latency-cost-them-1-in-sales/>. And a web page can depend on (indirectly) very many servers, which means that e.g. high latency that only occurs 1% of the time on any single server actually affects a large fraction of requests. Ben. -- Ben Hutchings The world is coming to an end. Please log off.