Michael Welsh Duggan <m...@md5i.com> writes: > I am now getting the following error when trying to do a btrfs send: > > root@maru2:/usr/local/src/btrfs-progs# ./btrfs send > /usr/local/snapshots/2014-05-15 > /backup/intermediate > At subvol /usr/local/snapshots/2014-05-15 > ERROR: send ioctl failed with -5: Input/output error > > I'm running a 3.14.4 kernel, and Btrfs progs v3.14.1. > > root@maru2:/usr/local/src/btrfs-progs# uname -a > Linux maru2 3.14-1-amd64 #1 SMP Debian 3.14.4-1 (2014-05-13) x86_64 GNU/Linux > > root@maru2:/usr/local/src/btrfs-progs# ./btrfs --version > Btrfs v3.14.1 > > Is there anything I can do to help debug this issue?
I'd like to find out what is happening here. I am an experienced C programmer, but have not dealt with kernel hacking before. I _do_ know how to build and install a kernel. I'd like some hints on what logging, etc., I could add in order to determine where in the send ioctl processing the IO error is coming from. From there, I hope to move to "why." Ideally I'd be able to run gdb on this, but nothing I have read online about kernel debugging with gdb sounds promising. I'd make an image, but the amount of data is enough to make this prohibitive. -- Michael Welsh Duggan (m...@md5i.com) -- 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
