On Fri, Nov 02, 2018 at 02:29:42PM -0700, Omar Sandoval wrote:
> From: Omar Sandoval <osan...@fb.com>
>
> Make sure we don't shrink the device past an active swap file, but allow
> shrinking otherwise, as well as growing and balance.
>
> Signed-off-by: Omar Sandoval <osan...@fb.com>
> ---
> tests/btrfs/177 | 64 +++++++++++++++++++++++++++++++++++++++++++++
> tests/btrfs/177.out | 6 +++++
> tests/btrfs/group | 1 +
> 3 files changed, 71 insertions(+)
> create mode 100755 tests/btrfs/177
> create mode 100644 tests/btrfs/177.out
>
> diff --git a/tests/btrfs/177 b/tests/btrfs/177
> new file mode 100755
> index 00000000..12dad8fc
> --- /dev/null
> +++ b/tests/btrfs/177
> @@ -0,0 +1,64 @@
> +#! /bin/bash
> +# SPDX-License-Identifier: GPL-2.0
> +# Copyright (c) 2018 Facebook. All Rights Reserved.
> +#
> +# FS QA Test 177
> +#
> +# Test relocation (balance and resize) with an active swap file.
> +#
> +seq=`basename $0`
> +seqres=$RESULT_DIR/$seq
> +echo "QA output created by $seq"
> +
> +here=`pwd`
> +tmp=/tmp/$$
> +status=1 # failure is the default!
> +trap "_cleanup; exit \$status" 0 1 2 3 15
> +
> +_cleanup()
> +{
> + cd /
> + rm -f $tmp.*
> +}
> +
> +. ./common/rc
> +. ./common/filter
> +. ./common/btrfs
> +
> +rm -f $seqres.full
> +
> +# Modify as appropriate.
> +_supported_fs generic
> +_supported_os Linux
> +_require_scratch_swapfile
> +
> +swapfile="$SCRATCH_MNT/swap"
> +
> +# First, create a 1GB filesystem and fill it up.
> +_scratch_mkfs_sized $((1024 * 1024 * 1024)) >> $seqres.full 2>&1
> +_scratch_mount
> +dd if=/dev/zero of="$SCRATCH_MNT/fill" bs=1024k >> $seqres.full 2>&1
Can this be replaced by fallocate? Though it's just a 1GiB of data, it
still takes some seconds on rotational storage.
