Re: ext4 writeback performance issue in 6.12

[Matt Fleming]

On Fri, Oct 10, 2025 at 07:23:54PM +0200, Jan Kara wrote:
> 
> Maybe I misunderstood what you wrote about your profiles but you wrote that
> we were spending about 4% of CPU time in the block allocation code. Even if
> we get that close to 0%, you'd still gain only 4%. Or am I misunderstanding
> something?

Ah, I see. Yeah that's true but that's 4% of CPU cycles that could be
put to better use elsehwere :D