Re: [PATCH v10 13/13] docs: add io_queue flag to isolcpus

[Ming Lei]

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