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.
-Gui > > > Thanks, > > Gui > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
