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| author | Scott Moser <smoser@ubuntu.com> | 2015-08-12 12:51:39 -0400 |
|---|---|---|
| committer | Scott Moser <smoser@ubuntu.com> | 2015-08-12 12:51:39 -0400 |
| commit | 827b7b903abc07d5fb04591bbae5587e6dc44993 (patch) | |
| tree | 021196d7ed01fc14705bce011bb3003c7ca44b99 | |
| parent | a9c1e3f747ae69401ebfca9ae64eec1c6d20ebe7 (diff) | |
| download | vyos-cloud-init-827b7b903abc07d5fb04591bbae5587e6dc44993.tar.gz vyos-cloud-init-827b7b903abc07d5fb04591bbae5587e6dc44993.zip | |
swap: create swap with fallocate if possible
fallocate is much faster than 'dd' for creating and initializing a
swap file.
LP: #1482994
| -rw-r--r-- | cloudinit/config/cc_mounts.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/cloudinit/config/cc_mounts.py b/cloudinit/config/cc_mounts.py index 73b42f91..47b63dfc 100644 --- a/cloudinit/config/cc_mounts.py +++ b/cloudinit/config/cc_mounts.py @@ -206,7 +206,8 @@ def setup_swapfile(fname, size=None, maxsize=None): util.log_time(LOG.debug, msg, func=util.subp, args=[['sh', '-c', ('rm -f "$1" && umask 0066 && ' - 'dd if=/dev/zero "of=$1" bs=1M "count=$2" && ' + '{ fallocate -l "${2}M" "$1" || ' + ' dd if=/dev/zero "of=$1" bs=1M "count=$2"; } && ' 'mkswap "$1" || { r=$?; rm -f "$1"; exit $r; }'), 'setup_swap', fname, mbsize]]) |