we've got big amount of crashes at KDE bugtracker, with each and one being with
openSUSE 13.2, using btrfs as root fs and using 3.16.6 kernel.
report can be found here:
https://bugs.kde.org/show_bug.cgi?id=340657


KSharedDataCache is used for e.g. Plasma cache and icon cache, and it in turn
uses posix_fallocate and mmap, thus apparently a btrfs bug triggers crashing
(all reports have plasma receiving a SIGBUS)

there is also report with very similar usage @ btrfs ML:
http://www.spinics.net/lists/linux-btrfs/msg38740.html

users there report the issue is gone with 3.17.2 kernels..
(on KDE tracker we have so far one user validating that there is no crashes
with 3.17.2)

if you have knowledge which would be commit specifically addressing this issue,
please backport it, otherwise, if possible, please update to latest stable
kernel (i've read the discussion @ opensuse-kernel, so this doesn't look likely
;-) as this is making a KDE experience on openSUSE 13.2 pretty bad.


thanks in advance!