On Wed, Jul 6, 2016 at 10:35 PM, Holger Hoffstätte <holger@xxxxxxxxxxxxxxxxxxxxxx> wrote: > On 07/06/16 14:25, Wang Shilong wrote: >> 'btrfs file du' is a very useful tool to watch my system >> file usage with snapshot aware. >> >> when trying to run following commands: >> [root@localhost btrfs-progs]# btrfs file du / >> Total Exclusive Set shared Filename >> ERROR: Failed to lookup root id - Inappropriate ioctl for device >> ERROR: cannot check space of '/': Unknown error -1 >> >> and My Filesystem looks like this: >> [root@localhost btrfs-progs]# df -Th >> Filesystem Type Size Used Avail Use% Mounted on >> devtmpfs devtmpfs 16G 0 16G 0% /dev >> tmpfs tmpfs 16G 368K 16G 1% /dev/shm >> tmpfs tmpfs 16G 1.4M 16G 1% /run >> tmpfs tmpfs 16G 0 16G 0% /sys/fs/cgroup >> /dev/sda3 btrfs 60G 19G 40G 33% / >> tmpfs tmpfs 16G 332K 16G 1% /tmp >> /dev/sdc btrfs 2.8T 166G 1.7T 9% /data >> /dev/sda2 xfs 2.0G 452M 1.6G 23% /boot >> /dev/sda1 vfat 1.9G 11M 1.9G 1% /boot/efi >> tmpfs tmpfs 3.2G 24K 3.2G 1% /run/user/1000 >> >> So I installed Btrfs as my root partition, but boot partition >> can be other fs. >> >> We can Let btrfs tool aware of this is not a btrfs file or >> directory and skip those files, so that someone like me >> could just run 'btrfs file du /' to scan all btrfs filesystems. >> >> After patch, it will look like: >> Total Exclusive Set shared Filename >> skipping not btrfs dir/file: boot >> skipping not btrfs dir/file: dev >> skipping not btrfs dir/file: proc >> skipping not btrfs dir/file: run >> skipping not btrfs dir/file: sys >> 0.00B 0.00B - //root/.bash_logout >> 0.00B 0.00B - //root/.bash_profile >> 0.00B 0.00B - //root/.bashrc >> 0.00B 0.00B - //root/.cshrc >> 0.00B 0.00B - //root/.tcshrc >> >> This works for me to analysis system usage and analysis >> performaces. > > This is great, but can we please skip the "skipping .." messages? > Maybe it's just me but I really don't see the value of printing them > when they don't contribute to the result. > They also mess up the display. :) I don't have a taste whether it needed or not, because it is somehow useful to let users know some files/directories skipped.... Wait some other guys opinion for this... thanks, Shilong > > thanks, > Holger > -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
