On Wed, Mar 13, 2013 at 03:01:41PM -0400, Theodore Ts'o wrote: > On Wed, Mar 13, 2013 at 11:59:13AM -0700, Josh Triplett wrote: > > I frequently test kernel changes by booting them with kvm's -kernel > > option, with -hda pointing to my host system's root filesystem, and > > -snapshot to prevent writing to (and likely corrupting) that root > > filesystem. I tried this with a kernel built from git commit > > 7c6baa304b841673d3a55ea4fcf9a5cbf7a1674b, with a stock x86-64 "make > > defconfig", and got a kernel panic: > > Can you send me the output of "dumpe2fs -h" on your host system's root > file system? Attached. - Josh Triplett
dumpe2fs 1.42.5 (29-Jul-2012) Filesystem volume name: <none> Last mounted on: / Filesystem UUID: e23a62e0-8a4a-48d0-b781-e11ae069ab06 Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype needs_recovery extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 17711104 Block count: 70817792 Reserved block count: 708177 Free blocks: 50350508 Free inodes: 17149541 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 1007 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8192 Inode blocks per group: 512 Flex block group size: 16 Filesystem created: Tue Jul 10 22:09:47 2012 Last mount time: Wed Mar 13 10:19:40 2013 Last write time: Wed Mar 13 10:19:40 2013 Mount count: 6 Maximum mount count: 27 Last checked: Mon Mar 11 21:27:56 2013 Check interval: 15552000 (6 months) Next check after: Sat Sep 7 21:27:56 2013 Lifetime writes: 776 GB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 First orphan inode: 12845162 Default directory hash: half_md4 Directory Hash Seed: 22edf7ec-c22c-43aa-a7ea-c3349da9a00c Journal backup: inode blocks Journal features: journal_incompat_revoke Journal size: 128M Journal length: 32768 Journal sequence: 0x0023bba0 Journal start: 10041
