Hi, I found a perfect way how you can test small file issue in btrfs because every time I tried it it breaks btrfs. I tried on several partition with over 200+GB of free space, and after starting openwrt compile process that creates few hundred thousand small files I get "out of space" error. On ext4 partition openwrt doesn't fail and it uses around 4GB of space. All test were done on Fedora 16 with Linux 3.3.0 kernel. And here are the instructions if you like to try out for yourself: http://wiki.openwrt.org/doc/howto/buildroot.exigence http://wiki.openwrt.org/doc/howto/build After finding out this issue I reformatted my /home and /storage partitions to ext4. I read on few mailing lists that this is an old and fixed btrfs issue, but it looks that (at least in Fedora) it still affect some extreme use cases, like building openwrt firmware. Cheers, Valent. -- follow me - www.twitter.com/valentt & http://kernelreloaded.blog385.com linux, anime, spirituality, wireless, scuba, linuxmce smart home, zwave ICQ: 2125241, Skype: valent.turkovic, MSN: valent.turkovic@xxxxxxxxxxx -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel