Re: kern/60144: virtio(4) cache coherence issue

[Jason Thorpe <thorpej%me.com@localhost>]

> On Mar 31, 2026, at 2:55 AM, Tetsuya Isaki <isaki%pastel-flower.jp@localhost> wrote:
> 
> Mostly yes.
> In my emulator, I tend to focus on accuracy (though performance is
> also important).
> If asked why you are implementing a cache (even though it could not
> contribute to performance), my answer is "because it's there." :)
> 
> But seriously, though it's off topic,
> speaking of 68030, it is VA cache.  When a cache hit occurs,
> it can skip not only memory access but also both ATC lookup and
> table search.  So, my cache implementation also contributed to
> performance well on my 68030 emulation.

Oh, I don’t doubt that one bit!  I was more speaking philosophically about VirtIO specifically.

-- thorpej