-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 03/08/2014 02:35 AM, Swâmi Petaramesh wrote: > Hi there, > > I tried to perform an incremental backup as described in > https://urldefense.proofpoint.com/v1/url?u=https://btrfs.wiki.kernel.org/index.php/Incremental_Backup&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=cKCbChRKsMpTX8ybrSkonQ%3D%3D%0A&m=b7nDm4ij%2BOl6zWwvbxbx%2BbfpaygHhTjGu8dUoBmQj8E%3D%0A&s=550780a62cfd5275891e088623e3d05c78f828ee008ef9b1cb99957ee3752a5d > between 2 external USB drives, > > The 1st "btrfs send foo/snap1 | btrfs receive bar" went well, > although it took 5-6 times the time the same workload takes in > ZFS. > > Then "btrfs send -v -p foo/snap1 foo/snap2 | btrfs receive bar" > crashed on me. > > After a reboot and retry, I get a KERNEL BUG again : > >
Well that's odd, I can't think of how this would happen. Can pull down btrfs-next and run that and verify you still hit the BUG_ON? If you do please apply this patch and re-run and reply with the dmesg. http://paste.fedoraproject.org/84393/55775013 This will spit out something like this cur_ino=<NUMBER>, cmp_key objectid=<OTHER NUMBER> then I need you to unmount your fs and run btrfs-debug-tree /dev/whatever > blah.txt You have about 1.5 gig of metadata so that is going to take a while. Once that is done you want to go through blah.txt and look for item <number> key (<OTHER NUMBER FROM ABOVE> EXTENT_DATA <number>) You need to find all of these entries and copy them down, an example output looks like this item 1 key (286 EXTENT_DATA 577536) itemoff 3889 itemsize 53 extent data disk byte 12763136 nr 4096 extent data offset 0 nr 4096 ram 4096 extent compression 0 That is what I'm looking for, you will have multiple of these. Thanks, Josef -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJTH0P+AAoJEANb+wAKly3BA+8QAMuccHP7+IIQ62g9WRRgOuBh Mz/XG+lxpGwbHSwwp7MZPGO10Ee9rJiIJJp/VgHSyNcb/6VHB7HtU1ijifcBFaGj NkgdTTVHRHl/z17wv2cuiRfCZKOyzXtNvRYGY+lhEfITxeGklUSjwMdCBtG73XqK gWU3f9hvBjbTtN8Q7RD0O/TRNyrcUK5sEGtfJGM/a0U+avlZpE+Vu89g716BUi5L F2I5OFRtkVj9WpZLzT6e3PM/5hc0Rg0kgd54fnJoTD34GyNCyqCo1GRhON4DG+ew NCedZI3aY+/yK9iiaAfcdDpm9332xiVfrJt9tq7EJus/EVyHoDGCUbdN4D2JV+TM 8xapBtcRfy4KExORVtxOpsaamx/xPz53mngN9AH+9mLRO0OZ9xYN5SrN7FCSi/ja dhdCSR2ndEXmsy3MvcaK0g+d2DntL4uliHb3S6GUlAsDaJuiKoINa4no/FmISc62 uVEbc/cJD0KUKFlUGEcEKst3ja6ecOKFqvutII3t73R7c0N1cvf0yU4WJCTv44CZ iClBqTI/d23Du6VZpN9hcGSvFap5HiZDO+YCLA/+o5mqMJ2bG8pNQ2cXRzJlSpCN 7zZLAo8Xz0C734F6/SxnoFb+fZATQOz6VX40ZbgL1x931s/jaTJ35c0ZrlBcNSJY Y8HYBWVEOlXCUkbap7XT =hcwz -----END PGP SIGNATURE----- -- 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
