Re: [RFC PATCH v1 0/9] freezer: Introduce freeze priority model to address process dependency issues
From: Michal Hocko <mhocko@suse.com>
Date: 2025-08-08 07:00:40
Also in:
linux-fsdevel, linux-mm, linux-pm, lkml
On Fri 08-08-25 09:13:30, Zihuan Zhang wrote: [...]
However, in practice, we’ve observed cases where tasks appear stuck in uninterruptible sleep (D state) during the freeze phase — and thus cannot respond to signals or enter the refrigerator. These tasks are technically TASK_FREEZABLE, but due to the nature of their sleep state, they don’t freeze promptly, and may require multiple retry rounds, or cause the entire suspend to fail.
Right, but that is an inherent problem of the freezer implemenatation. It is not really clear to me how priorities or layers improve on that. Could you please elaborate on that? -- Michal Hocko SUSE Labs