On 2018/9/24 下午6:16, Anand Jain wrote: > commit 97575acd7495 (generic/015: Change the test filesystem size to > 101mb), created 101mb FS instead of 100mb FS to make sure we create > a FS which is non mixed mode, which is our default mode. > > btrfs-progs commit 18e2663db3e1 (btrfs-progs: Add minimum device size > check) added a more accurate minimum required space to create the btrfs > FS in non mixed mode. Which is at 14294784 bytes. > > So this patch changes the FS size to be created by _scratch_sized_mkfs > to 200mb so that we create the FS in non mixed mode. > > To test mixed blockgroup its better we set it using the MKFS_OPTIONS > explicitly. > > Signed-off-by: Anand Jain <anand.j...@oracle.com> > --- > tests/generic/015 | 9 ++++----- > 1 file changed, 4 insertions(+), 5 deletions(-) > > diff --git a/tests/generic/015 b/tests/generic/015 > index 0f4d29800f4f..14941ab6d552 100755 > --- a/tests/generic/015 > +++ b/tests/generic/015 > @@ -37,11 +37,10 @@ _supported_os Linux > _require_scratch > _require_no_large_scratch_dev > > -# With filesystems less than 100mb btrfs is created in mixed mode > -# which can lead to slight accounting errors of 1mb. Having the > -# fs be at least 101 mb ensures those errors are within the error > -# tolerance of 1% > -_scratch_mkfs_sized `expr 101 \* 1024 \* 1024` >/dev/null 2>&1 \ > +# With filesystems less than ~200mb _scratch_mkfs_sized will create > +# data and metadata mixed mode btrfs, so use 200mb so that we test > +# the default btrfs. > +_scratch_mkfs_sized $((200 * 1024 * 1024)) >> $seqres.full 2>&1 \ > || _fail "mkfs failed"
Just as mentioned in the first patch, the minimal size for non-mixed btrfs depends on mkfs profile. Metadata DUP and data DUP would fail using 200M mkfs size: $ mkfs.btrfs -m DUP -d DUP -b 200M /dev/data/btrfs -f btrfs-progs v4.17.1 See http://btrfs.wiki.kernel.org for more information. ERROR: size 209715200 is too small to make a usable filesystem ERROR: minimum size for btrfs filesystem is 240123904 This problem applies to all patches, unfortunately. Thanks, Qu > _scratch_mount > out=$SCRATCH_MNT/fillup.$$ >
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