Cc: Josef >>>>>>>> I encountered following panic using 'btrfs-unstable + for-linus' >>>>>>>> kernel. >>>>>>>> >>>>>>>> I ran "btrfs fi bal /test5" command, and mount option of /test5 >>>>>>>> is as follows: >>>>>>>> >>>>>>>> /dev/sdc3 on /test5 type btrfs (rw,space_cache,compress=lzo,inode_cache) >>>>>>>> >>>>>>> So, just a "btrfs fi bal" would lead to the bug? >>>>>> I think so. >> >> It should be specific to the inode caching code. The balancing code is >> finding the inode map cache extents, but it doesn't know how to relocate >> them. > > However, the panic has occurred even if inode_cahce is turned off. > Is this another problem? > I don't think free inode cache isthe cause of the bug here (even if inode_cache is turned on). What I have found out is: 1. git checkout a4abeea41adfa3c143c289045f4625dfaeba2212 So the top commit is the removal of trans_mutex and no delayed_inode patch or free inode cache patchset in the tree, and bug can be triggered. 2. git checkout 2a1eb4614d984d5cd4c928784e9afcf5c07f93be So the top commit is the one before trans_mutex removal, and no bug triggered. 3. test linus' tree bug triggered. 4. revert that suspicoius commit manually from linus' tree no bug. so either that commit is buggy or it reveals some bugs covered by the trans_mutex. -- 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
