Re: [linux-next:master] [drivers/char/mem] 1b057bd800: stress-ng.splice.ops_per_sec -99.8% regression

From: Max Kellermann
Date: Wed Oct 18 2023 - 04:12:40 EST


On Wed, Oct 18, 2023 at 9:57 AM Greg Kroah-Hartman
<gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> That's odd given that as was pointed out, this test does not even touch
> the code paths that this patch changed.

I think I mixed up the "vmsplice" and the "splice" tests, and my
conclusion was wrong, sorry.
This performance regression is about the "splice" test which indeed
uses /dev/zero. I'll have a closer look and get back to you.