On Wed, Apr 15, 2026 at 10:56:37AM -0400, Aaron Tomlin wrote: > On Mon, Apr 13, 2026 at 11:11:15PM +0800, Ming Lei wrote: > > But typical applications aren't supposed to submit IOs from these > > isolated CPUs, so in reality, it isn't a big deal. > > Hi Ming, > > While that may be true for general-purpose workloads, it is a fundamentally > incorrect assumption for the highly specialised environments that actually > rely on strict CPU isolation, such as High-Frequency Trading (HFT). > > The requirement in these strict environments is not that the isolated CPU > performs zero I/O. Rather, the requirement is that the isolated CPU must be > shielded from the unpredictable latency of the hardware completion > interrupt.
Again it is just your opinion, not a bug report, may not be a fact, right? Which kind of HFT application submits IO from isolated CPU? However, as I mentioned, I don't object this patchset, but you have to fix all wrong comment & document & bug found in review first. Thanks, Ming
