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rc.shutdown: reorder a bit
The new ordering is now: 1) book-keeping 2) shutting down and killing processes 3) swapoff 4) unmounting and tearing down of block devices The reason to move 1) to the top is so it will not interfere with the killing of processes. The reason for not moving 3) to the top as well is that we want to minimize the amount of stuff that has to be moved from swap to ram. However, swapoff must happen before 4) as we don't know what is under the swap device/file. Added a TODO: unmount any devices backed by swap (tmpfs/ramfs) to make sure that their contents is thrown away rather than moved to ram. In principle we might get OOM on shutdown due to the current situation, but in most cases the only problem should be that shutdown is unecessarily slow. Thanks to Dan and Dave for prompting me to look into this. Cc: Dan McGee <email@example.com> Cc: Dave Reisner <firstname.lastname@example.org> Signed-off-by: Tom Gundersen <email@example.com>
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