On Thursday, December 26, 2013 02:01:20 PM Tejun Heo wrote: > Hey, > > On Thu, Dec 26, 2013 at 01:42:29PM -0500, Alan Stern wrote: > > In the case of hibernation, it's not so simple. We do need to perform > > I/O, in order to save the memory image. But we also need to avoid > > unnecessary I/O, in order to keep the on-disk data consistent with the > > data in the memory image. You probably can't accomplish this at the > > device driver or subsystem level. > > That was what I assumed too but Rafael tells me it has nothing to do > with hibernation.
It doesn't prevent on-disk data corruption from happening in case of a failing hibernation. In case of a successful hibernation it is key to keep on-disk data in sync with the contents of the image, but relying on the freezing for that is rather not a winning strategy, so to speak. It would be better to freeze filesystems instead (which has been discussed in another thread recently). Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
