On 06/12/2012 08:53 AM, Santosh Hosamani wrote: > > Hi btrfs folks, > I am working on btrfs filesystem on how it manages the free > space. And found out btrfs maintain a ctree which manages the physical > location of the chunks and stripes of the filesystem. > Btrfs-debug-tree also gives the information on the chunk tree > > I created btrfs on single device and two device.I have attached the output of > both on running btrfs-debug-tree. > For single device sum of all the length in the chunks will add upto the total > used bytes which is expected behavior. > > But for two devices sum of all lengths in the chunks does not add to the > total bytes .Am I missing something . > Also I notice that for the second device the superblock location 0x10000 is > not considered as used . > > I would be really grateful if you folks can answer my query.
It's definitely not a bug in debug-tree, but just a problem in interpreting the result. Could you please paste the output of btrfs-debug-tree -d? This way it is easier to see what's bothering you :) > > I hav run these tests on SLES11-sp2-x86 > Kernel 3.0.13.0.27-default > > If you want any further clarification I would be wiiling to help you guys on > this. > > Thanks, > Santosh Hosamani > > > > ________________________________ > > http://www.mindtree.com/email/disclaimer.html -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
