Re: [Bug 221055] New: Hibernate image write 10x slower since commit 0ff67f990bd4 ("mm, swap: remove swap slot cache")

[Kairui Song <ryncsn@gmail.com>]

On Sun, Feb 15, 2026 at 4:56 PM Carsten Grohmann <carstengrohmann@gmx.de> wrote:
>
> 12.02.2026 21:37:04 Carsten Grohmann <carstengrohmann@gmx.de>:
>
> > 12.02.2026 20:01:48 Kairui Song <ryncsn@gmail.com>:
> >
> >> And can anyone help verify this fix? I'll also try some other SSD
> >> later
> >> maybe that's only reproducible with SSD that have very poor 4K
> >> performance.
> > I'll try out your patch over the weekend.
>
> I tested your patch with the current HEAD from git.kernel.org. The first
> run is with your patch, the second without:
>
> Date:     2026-02-15 08:29:33
> Commit:   770aaedb461a (Merge tag 'bootconfig-v7.0' of
> git://git.kernel.or)
> Kernel:   6.19.0-20260214-153617-09922-g770aaedb461a-dirty
> Duration: 35 Sekunden
> Result:   good
> ----------------------------------------
> Date:     2026-02-15 09:01:25
> Commit:   770aaedb461a (Merge tag 'bootconfig-v7.0' of
> git://git.kernel.or)
> Kernel:   6.19.0-20260215-083120-09922-g770aaedb461a
> Duration: 324 Sekunden
> Result:   bad
>
> With your patch, hibernation is fast again. It solves the problem I
> reported.
>
> Thank you very much for taking care of my annoying problem.

Thank you very much for the testing! I'll post the fix with your tested-by.