Hi Chris and Kevin,
On 07/03/2014 09:21 PM, Satoru Takeuchi wrote:
Hi Kevin,
(2014/07/04 11:13), Kevin Brandstatter wrote:
basing of the latest for-linus branch i found i can write way more than
the quota
btrfs quota enable
btrfs subvolume create test
btrfs qgruop limit 1G test
dd if=/dev/zero of=test/file bs=1024 count=1500000
output:
1500000+0 records in
1500000+0 records out
1536000000 bytes (1.5 GB) copied, 5.91909 s, 259 MB/s
thats a full half gig over the quota limit. I noticed some changes to
the quota
accounting in the logs, what changed that could cause this?
Do you remember what kernel version quota worked correctly?
(2014/07/04 11:32), Satoru Takeuchi wrote:
(2014/07/04 11:25), Kevin Brandstatter wrote:
3.15.3 via arch/ and from linux-git
OK, I'll bisect it.
I made the following reproducer based on your operation.
It succeeded with 3.15 and failed with 3.16-rc3. So, the problematic
patch is not in mason/for-linux branch, but in somewhere between
3.15 and 3.16-rc3. Please wait for a while to finish my bisect...
===============================================================================
#!/bin/bash -x
TEST_DEV=/dev/vdb
TEST_MNT=/home/sat/mnt
umount $TEST_MNT
mkfs.btrfs -f $TEST_DEV
mount $TEST_DEV $TEST_MNT
btrfs quota enable $TEST_MNT
SUBVOLPATH=$TEST_MNT/quota_test
LIMIT=$((1024*1000000))
btrfs subvolume create $SUBVOLPATH
btrfs qgroup limit $LIMIT $SUBVOLPATH
TESTFILE=$SUBVOLPATH/test
dd if=/dev/zero of=$TESTFILE bs=1024 count=$(($LIMIT*3/2/1024))
SIZE=$(($(ls -s $TESTFILE | awk '{print $1}')*1024))
RET=0
if [ $SIZE -le $LIMIT ] ; then
echo "[PASS] quota works correctly" >&2
else
echo "[FAIL] quota doesn't work" >&2
RET=1
fi
exit $RET
===============================================================================
Thanks,
Satoru
Thanks,
Satoru
-Kevin Brandstatter
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