Re: RFC: Allow EXPLAIN to Output Page Fault Information

On 2026-01-25 23:35, Jelte Fennema-Nio wrote:

> On Tue Oct 28, 2025 at 9:43 AM CET, torikoshia wrote:
>> Rebased the patch again.
>
> I took another look at this patch because I think it would be really
> useful to have. Below is my review:

Thank you for the review!

> 8. Now that worker is the default io_method the new explain fields are
> never
> present in the explain tests anymore. So explain_1.out is
> unnecessary and can be removed. That obviously also means that
> there's no coverage for this feature at all in the tests currently,
> which is clearly a problem. So I think it would be good to add some
> actual tests for the feature using some other io_method in a Perl
> TAP
> test.

However, I noticed that there are test environments where io_method is
set to io_uring (for example, Linux Debian Trixie builds on Cirrus CI
using Meson), so it appears that explain_1.out is still needed.
Given this, adding the Perl TAP test might be somewhat redundant, but
for now I’m attaching a patch that includes both.

> 9. The added docs about the kernel not being built with the correct
> options seems a bit too much detail. I'd say remove that sentence.
> And maybe shorten th

Is this comment still a work in progress?

I agree with the other comments. Attached an updated patch reflecting
them.

Regards,

--
Atsushi Torikoshi
Seconded from NTT DATA Japan Corporation to SRA OSS K.K