On 03/10/2014 10:47 PM, Gui Hecheng wrote:
On Mon, 2014-03-10 at 20:16 -0700, Saul Wold wrote:
On 03/10/2014 07:38 PM, Gui Hecheng wrote:
On Mon, 2014-03-10 at 16:25 -0700, Saul Wold wrote:
Hi There
There seems to be an issue if we try to build a btrfs based FS that is
less than 70M, we get the following assertion failure:
mkfs.btrfs: extent-tree.c:2682: btrfs_reserve_extent: Assertion `!(ret)'
failed.
I tried to do a search on this and did not find anything obvious.
Further, if I do build a 70M image, it will not mount until I get to I
increase the about 100M!
# mount -o loop -v rootfs.btrfs mnt
mount: wrong fs type, bad option, bad superblock on /dev/loop0,
missing codepage or helper program, or other error
In some cases useful info is found in syslog - try
dmesg | tail or so.
I can provide a small rootfs (~4M) example if needed
Builds and mounts correct:
mkfs.btrfs -b 104857600 -r rootfs rootfs.btrfs
Builds, but does not mount:
mkfs.btrfs -b 73400320 -r rootfs rootfs.btrfs
Does not build, gives the above assertion error:
mkfs.btrfs -b 10889216 -r rootfs rootfs.btrfs
Thanks
Hi Saul,
Sorry, I'm not able to reproduce your problem...
Are you running the latest btrfs-progs from david's branch?
Yes, I am building it from git using master I think, git hash:
8cae1840afb3ea44dcc298f32983e577480dfee4
I tried both with and without the -M as cwillu suggested, still no joy,
I can send some the rootfs I am using to see if is's something specific.
Here's the full failure:
$ tmp/sysroots/x86_64-linux/usr/bin/mkfs.btrfs -M -b 10889216 -r
tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0-r0/rootfs rootfs.btrfs
SMALL VOLUME: forcing mixed metadata/data groups
SMALL VOLUME: forcing mixed metadata/data groups
WARNING! - Btrfs v3.12-dirty IS EXPERIMENTAL
WARNING! - see http://btrfs.wiki.kernel.org before using
Turning ON incompat feature 'mixed-bg': mixed data and metadata block groups
Turning ON incompat feature 'extref': increased hardlink limit per file
to 65536
Created a data/metadata chunk of size 8388608
fs created label (null) on rootfs.btrfs
nodesize 4096 leafsize 4096 sectorsize 4096 size 180.00MiB
Btrfs v3.12-dirty
scandir for
tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0-r0/rootfs failed:
No such file or directory
unable to traverse_directory
Making image is aborted.
mkfs.btrfs: mkfs.c:1592: main: Assertion `!(ret)' failed.
Aborted (core dumped)
Thanks for the help!
Sau!
I think the output really tells us the problem: the mkfs '-r' option
requires a 'directory' as an arg.
But still it should not abort with 'core dumped', I would be glad to
make it more friendly.
Yes, the
"tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0-r0/rootfs" is a
directory containing a rootfs, we use this with genext2fs with no
issues. As I said, I can provide you with a tarball of this directory
if you wish to try and reproduce this issue.
Sau!
-Gui
Thanks,
Gui
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