FSCache causing "bad page state" kernel panics on RHEL6
Issue
- We have RHEL6.2 systems with fscache enabled, and experienced regular kernel panics until we disabled fscache.
- Our RHEL6 systems frequently hang. There is a crash in
drop_buffersortry_to_free_bufferswith thefscachemodule loaded.
kernel BUG at fs/buffer.c:3238!
invalid opcode: 0000 [#1] SMP
last sysfs file: /sys/devices/system/cpu/cpu7/cache/index2/shared_cpu_map
CPU 0
Pid: PID, comm: processname Tainted: G B ---------------- T 2.6.32-220.13.1.el6.x86_64 #1
RIP: 0010:[<ffffffff811a825b>] [<ffffffff811a825b>] drop_buffers+0xbb/0xc0
...
Call Trace:
[<ffffffff811a8309>] try_to_free_buffers+0xa9/0xc0
Environment
- Red Hat Enterprise Linux (RHEL) 6
fscachemodule loaded
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