Hi together,
When I invoke `btrfsck --init-extent-tree /dev/sda12`, the process runs
for ~30 to 60 minutes with 100 % usage of one CPU core and then fails
with return code 139 without any feedback - an unexperienced user might
expect the program to have succeeded if he_she doesn't check `echo $?`.
In `dmesg`, I found
[ 5972.236772] btrfsck[8263]: segfault at 7fffb88c5ff8 ip
00007f542a8990f8 sp 00007fffb88c5fd0 error 6 in
libc-2.17.so[7f542a818000+1bd000]
Is that an error of `btrfsck` or is the libc errornous? I tried both
Ubuntu 13.10 and 14.04 with both Linux 3.16.2 from
http://kernel.ubuntu.com/~kernel-ppa/mainline/ and from kernel archives
(installed .deb packages created with `make deb-pkg`. Error is
constantly reproducable. Is it possible to fix it? I'm trying to make a
650 GB btrfs partition mountable again with btrfs-progs 3.16 after
`btrfs filesystem resize` failed. How could I work around the
segmentation fault? Is it normal that `btrfsck` takes so long?
Infos according to
https://btrfs.wiki.kernel.org/index.php/Btrfs_mailing_list
$ uname -a
Linux richter-lenovo-IdeaPad-Z500 3.16.2 #4 SMP Mon Sep 8 00:54:41
CEST 2014 x86_64 x86_64 x86_64 GNU/Linux
$ btrfs --version
Btrfs v3.16
$ sudo btrfs fi show
Label: none uuid: 5e999111-7efe-4818-b9e8-a950ad6d3296
Total devices 1 FS bytes used 27.35GiB
devid 1 size 37.91GiB used 29.29GiB path /dev/sda18
Label: none uuid: bfbb7b09-856b-4cbe-9821-3db14b322bd4
Total devices 1 FS bytes used 1.80TiB
devid 1 size 4.55TiB used 1.81TiB path /dev/sdc1
Label: none uuid: 95a0f5cd-0aed-49e1-9914-1e346ea1a3d6
Total devices 1 FS bytes used 3.60GiB
devid 1 size 29.54GiB used 6.04GiB path /dev/sda15
Label: none uuid: 32a15b4a-0351-4ed1-a950-f50a5591d84b
Total devices 1 FS bytes used 50.86GiB
devid 1 size 63.76GiB used 59.04GiB path /dev/sda14
Label: 'DATA' uuid: 5b08b6ff-34d2-42b7-965e-fd415a2b2874
Total devices 1 FS bytes used 2.93GiB
devid 1 size 650.08GiB used 582.95GiB path /dev/sda12
Label: none uuid: c64f7bde-047d-473d-aee3-a5def8294197
Total devices 1 FS bytes used 15.25GiB
devid 1 size 24.37GiB used 20.29GiB path /dev/sda9
Btrfs v3.16
dmesg.log attached
-Kalle
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