On Tue, Jun 25, 2013 at 2:48 PM, <[email protected]> wrote:
> Hi!
>> > There are certain testcases that needs a separate filesystem partition
>> > to play with, if you don't pass physical disk partition to the runtest
>> > script a loopback device is created, formatted and mounted.
>> >
>> >> 10240+0 records in
>> >> 10240+0 records out
>> >> 10240000 bytes (10 MB) copied, 0.260004 s, 39.4 MB/s
>> >> ^C
>> >>
>> >> root# dmesg | tail
>> >>
>> >> [ 78.095907] EXT4-fs (loop1): VFS: Can't find ext4 filesystem <--- ???
>> >
>> > This simply looks like the 10MB image is not enough for the ext4 journal
>> > for some reason.
>> >
>> > Try following patch that increases the size to 100MB.
>> >
>> > diff --git a/runltp b/runltp
>> > index a8bf404..7955f44 100755
>> > --- a/runltp
>> > +++ b/runltp
>> > @@ -984,7 +984,7 @@ main()
>> > create_block()
>> > {
>> > #create a block device with ext4 filesystem.
>> > - dd if=/dev/zero of=${TMP}/test.img bs=1kB count=10240 &>/dev/null
>> > + dd if=/dev/zero of=${TMP}/test.img bs=1kB count=102400 &>/dev/null
>> > if [ $? -ne 0 ]; then
>> > echo "Failed to create loopback device image, please check disk
>> > space and re-run"
>> > return 1
>> > --
>>
>> Hmm, that did not help.
>
> What was the error message, same as previous?
>
Here we go.
...
mount: wrong fs type, bad option, bad superblock on /dev/loop1,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so
FATAL: can't mount block device /dev/loop1.
mke2fs 1.42 (29-Nov-2011)
mkfs.ext4: Device size reported to be zero. Invalid partition specified, or
partition table wasn't reread after running fdisk, due to
a modified partition being busy and in use. You may need to reboot
to re-read your partition table.
102400+0 records in
102400+0 records out
102400000 bytes (102 MB) copied, 0.542412 s, 189 MB/s
...
# dmesg | tail
...
[ 1179.820940] EXT4-fs (loop1): VFS: Can't find ext4 filesystem
- Sedat -
>> How much disc-space someone need on the partition where LTP resides
>> (where the tests are performed)?
>
> Not much, I do not know the precise number but about gigabyte should be
> enough (and far less when you omit aio and fs stress tests).
>
>> $ LANG=C LC_ALL=C df -T
>> Filesystem Type 1K-blocks Used Available Use% Mounted on
>> rootfs rootfs 17753424 12825524 4003024 77% /
>> udev devtmpfs 1960968 4 1960964 1% /dev
>> tmpfs tmpfs 788020 888 787132 1% /run
>> /dev/sda2 fuseblk 465546236 107358584 358187652 24% /host
>> /dev/loop0 ext4 17753424 12825524 4003024 77% /
>> none tmpfs 5120 0 5120 0% /run/lock
>> none tmpfs 1970048 156 1969892 1% /run/shm
>>
>> Can I use a different partition where I have more disc-space available?
>
> LTP uses TMPDIR env variable for that (and defaults to /tmp/ when TMPDIR
> is not set).
>
> --
> Cyril Hrubis
> [email protected]
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