Re: [PATCH v2] ata: libata: avoid superfluous disk spin down + spin up during hibernation

On Tue, 08 Oct 2024 15:58:44 +0200, Niklas Cassel wrote:

A user reported that commit aa3998dbeb3a ("ata: libata-scsi: Disable scsi device manage_system_start_stop") introduced a spin down + immediate spin up of the disk both when entering and when resuming from hibernation. This behavior was not there before, and causes an increased latency both when when entering and when resuming from hibernation.

Hibernation is done by three consecutive PM events, in the following order:

1. PM_EVENT_FREEZE
2. PM_EVENT_THAW
3. PM_EVENT_HIBERNATE

[...]

Applied to libata/linux.git (for-6.12-fixes), thanks!

[1/1] ata: libata: avoid superfluous disk spin down + spin up during hibernation https://git.kernel.org/libata/linux/c/a38719e3

Kind regards, Niklas