Re: [PATCH v2 0/4] proc: improve root readdir latency with many threads

From: Matthew Wilcox
Date: Mon Jul 11 2022 - 16:19:49 EST

On Mon, Jul 11, 2022 at 09:52:33AM -0400, Brian Foster wrote:
> Hi all,
> Here's v2 of the /proc readdir optimization patches. See v1 for the full
> introductary cover letter.

I really don't want to change the radix tree or IDR code. That's why
I did the conversion of the pid code to use the XArray for you.

> The refactoring in v2 adds a bit more to the idr code, but it remains
> trivial with respect to eventual xarray (tag -> mark) conversion. On
> that topic, I'm still looking for some feedback in the v1 thread [1] on
> the prospective approach...

Oh, I missed the last few emails in that thread due to being on holiday.
I'll go back and read/reply to them now.