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Hi! > This could be used to have a process execute any other piece that is > required to run in the context of the thread. Maybe such a feature could > help with PTRACE or/and get_user_pages that currently do ugly things to a > process. It may also allow changing values that so far cannot be > changed from the outside in the task struct by running a function > in the context of the process. Well, we really need slightly more from "running in process context": we also need "no locks held" for swsusp. (But other uses probably do, too?) > Here is a patch against Linus current tree that does this. Note that this > patch is incomplete at this point and only a basis for further discussion. > Not all software suspend checkpoints are useful for a notifier chain. We > would need to inspect several cases where drivers/kernel threads have > special functionality for software suspend. I guess I'd prefer if you left "refrigerator()" and "try_to_freeze()" functions in; there are about 1000 drivers that know/use them, and some patches are probably in the queue.... Pavel -- teflon -- maybe it is a trademark, but it should not be. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
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