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authorTom Gundersen <teg@jklm.no>2011-10-29 12:58:30 +0200
committerTom Gundersen <teg@jklm.no>2011-10-29 17:28:45 +0200
commit3fd0222be7868096e9ed6d97ccee1b3c1ae4d394 (patch)
tree7cf8733bb2c571ffecf1c18bff33f35d44690674 /rc.shutdown
parent00070eca730dec9c6d587cc1639f6abaca83fa34 (diff)
downloadinitscripts-3fd0222be7868096e9ed6d97ccee1b3c1ae4d394.tar.xz
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 <dpmcgee@gmail.com> Cc: Dave Reisner <d@falconindy.com> Signed-off-by: Tom Gundersen <teg@jklm.no>
Diffstat (limited to 'rc.shutdown')
-rwxr-xr-xrc.shutdown34
1 files changed, 20 insertions, 14 deletions
diff --git a/rc.shutdown b/rc.shutdown
index 5928b2d..1946068 100755
--- a/rc.shutdown
+++ b/rc.shutdown
@@ -19,20 +19,6 @@ run_hook shutdown_start
stop_all_daemons
-status "Shutting down UDev" udevadm control --exit
-
-status "Deactivating Swap" swapoff -a
-
-# stop monitoring of lvm2 groups before unmounting filesystems
-[[ $USELVM = [Yy][Ee][Ss] && -x $(type -P lvm) ]] &&
- status "Deactivating monitoring of LVM2 groups" vgchange --monitor n
-
-run_hook shutdown_prekillall
-
-kill_all
-
-run_hook shutdown_postkillall
-
stat_busy "Saving Random Seed"
RANDOM_SEED=/var/lib/misc/random-seed
install -TDm 0600 /dev/null $RANDOM_SEED
@@ -51,6 +37,26 @@ stat_done
# Write to wtmp file before unmounting
halt -w
+# stop monitoring of lvm2 groups before unmounting filesystems
+[[ $USELVM = [Yy][Ee][Ss] && -x $(type -P lvm) ]] &&
+ status "Deactivating monitoring of LVM2 groups" vgchange --monitor n
+
+# any future uevents can and should be ignored
+status "Shutting down UDev" udevadm control --exit
+
+run_hook shutdown_prekillall
+
+kill_all
+
+run_hook shutdown_postkillall
+
+# TODO: unmount any non-api partitions that are backed by swap, we don't want to
+# move their contents into memory (waste of time and might caues OOM).
+
+# almost everything is dead now, so the swap should hopefully be relatively
+# empty, and quick to switch off
+status "Deactivating Swap" swapoff -a
+
# if we don't have devtmpfs support, /dev is mounted as tmpfs, so don't unmount it
status "Unmounting Filesystems" \
umount -a -r -t nodevtmpfs,notmpfs,nosysfs,noproc,nodevpts -O no_netdev