Hi,
在 2024/01/15 13:59, Christoph Hellwig 写道:
On Sun, Jan 14, 2024 at 11:22:01AM +0800, Yu Kuai wrote:
As you might noticed, Bart and I both met the performance problem in
production due to fair tag sharing in the environment that total driver
tags is not sufficient. Disable fair tag sharing is a straight way to
fix the problem, of course this is not the ideal solution, but make tag
sharing configurable and let drivers make the decision if they want to
disable it really solve the dilemma, and won't have any influence
outside the driver.
How can the driver make any sensible decision here? This really looks
like a horrible band aid. You'll need to figure out a way to make
the fair sharing less costly or adaptic. That might involve making it
a little less fair, which is probably ok as long a the original goals
are met.
Yes, I totally agree that make fair sharing adaptic is better, and
actually I tried once but looks like I can't push forward.
Can you take a look at my previous patset if you haven't? And it'll
be great to hear from your comments.
https://lore.kernel.org/all/20231021154806.4019417-1-yukuai1@xxxxxxxxxxxxxxx/
Thanks,
Kuai
.
