On Tue, Apr 01, 2025 at 04:14:07PM +0200, Peter Zijlstra wrote: > On Tue, Apr 01, 2025 at 02:32:45AM +0200, Christian Brauner wrote: > > The whole shebang can also be found at: > > https://web.git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git/log/?h=work.freeze > > > > I know nothing about power or hibernation. I've tested it as best as I > > could. Works for me (TM). > > > > I need to catch some actual sleep now... > > > > --- > > > > Now all the pieces are in place to actually allow the power subsystem to > > freeze/thaw filesystems during suspend/resume. Filesystems are only > > frozen and thawed if the power subsystem does actually own the freeze. > > Urgh, I was relying on all kthreads to be freezable for live-patching: > > https://lkml.kernel.org/r/20250324134909.GA14718@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx > > So I understand the problem with freezing filesystems, but can't we > leave the TASK_FREEZABLE in the kthreads? The way I understand it, the Yeah, we can. > power subsystem will first freeze the filesystems before it goes freeze > threads anyway. So them remaining freezable should not affect anything, > right? Yes. I've dropped the other patches. I've discussed this later downthread with Jan. >
