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

[Aaron Tomlin]

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.


Kind regards,
-- 
Aaron Tomlin

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