Re: Attempted summary of suspend-blockers LKML thread

From: Matthew Garrett
Date: Wed Aug 04 2010 - 12:35:44 EST

On Wed, Aug 04, 2010 at 09:32:16AM -0700, Paul E. McKenney wrote:

> If this doesn't work for the Android folks for whatever reason, another
> approach would be to do the freeze in user code, which could track
> whether any user-level resources (pthread mutexes, SysV semas, whatever)
> where held, and do the freeze on a thread-by-thread basis within each
> "victim" application as the threads reach safe points.

The main problem I see with the cgroups solution is that it doesn't seem
to do anything to handle avoiding loss of wakeup events.

Matthew Garrett | mjg59@xxxxxxxxxxxxx
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