[Bug 215880] Resume process hangs for 5-6 seconds starting sometime in 5.16

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215880

jason600 (jason600.groome@gmail.com) changed:

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                 CC|                            |jason600.groome@gmail.com

--- Comment #26 from jason600 (jason600.groome@gmail.com) ---
I have been experiencing the same problem since 5.16. I have a hd and ssd (boot
from the ssd). Since 5.16 resume from suspend to ram is taking 6-8 seconds
(with 5.15 and before, it was less then 2 seconds. 

I narrowed it down to the hd waiting for spinup to finish suspend. Hdparm had
not effect, also unmounting the drive had no effect. The only was to fix it was
to remove the hd (mounted on sda) with 

# echo 1 > /sys/block/sda/device/delete

Then it resumed in 2 seconds again, but I couldn’t access the hd again until
reboot.

I installed the patches from https://github.com/bvanassche/linux/tree/sd-resume
on Opensuse Tumbleweed kernel 5.18.6.

I can confirm the patches work, resume from suspend is now back to under 2
seconds, with no obvious problems.

Thank you very much.

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