Re: Back to the future.

[David Lang]

On Sat, 28 Apr 2007, Pavel Machek wrote:

> > We freeze user space processes for the reasons that you have quoted above.
> >
> > Why we freeze kernel threads in there too is a good question, but not for me to
> > answer.  I don't know.  Pavel should know, I think.
>
> We do not want kernel threads running:
>
> a) they may hold some locks and deadlock suspend
>
> b) they may do some writes to disk, leading to corruption
>
> We could solve a) by carefully auditing suspend lock usage to make
> sure deadlocks are impossible even with kernel threads running.

remember that we are doing suspend-to-disk, after we do the snapshot we will be 
doing a shutdown. that should simplify the locking issues

David Lang
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/