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sysvinit: add an inittab entry to activate swap

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There is a call to swapoff in the shutdown sequence, so call "swapon -a"
on startup. As stated in the swapon man page,

   All devices marked as "swap" in /etc/fstab are made available, except
   for those with the "noauto" option. Devices that are already being
   used as swap are silently skipped.

So even if the system has some init script to start/stop swap (e.g. from
a rootfs ovelay) calling swapon/swapoff would be harmless.

Signed-off-by: Carlos Santos <casantos@datacom.com.br>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit d2a091c96b)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Carlos Santos 2018-06-11 03:00:14 -03:00 committed by Peter Korsgaard
parent 0e4940d5f2
commit 5456704d4f
1 changed files with 2 additions and 1 deletions
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package/sysvinit/inittab
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@ -7,7 +7,8 @@ id:3:initdefault:
si0::sysinit:/bin/mount -t proc proc /proc
si1::sysinit:/bin/mount -o remount,rw /
si2::sysinit:/bin/mkdir -p /dev/pts /dev/shm
si4::sysinit:/bin/mount -a
si3::sysinit:/bin/mount -a
si4::sysinit:/sbin/swapon -a
si5::sysinit:/bin/ln -sf /proc/self/fd /dev/fd 2>/dev/null
si6::sysinit:/bin/ln -sf /proc/self/fd/0 /dev/stdin 2>/dev/null
si7::sysinit:/bin/ln -sf /proc/self/fd/1 /dev/stdout 2>/dev/null