[OpenAFS] Kernel panics, openafs 1.4.7 rhel/centos 5

[Miles Davis]

I'm sending this out before I have complete information, thinking somebody may 
recognize the problem and cut me off.

CentOS 5, tested on kernels 2.6.18-53.1.21.el5 and 2.6.18-53.1.13.el5 (patched 
for lustre, testing originals now).


Kernel panic while "accessing lots of files." E.g., du -s * on a large volume. 
Happens with memcache or disk cache

I need to capture a complete stack trace, but wrote this partial one down last 
night:

do_lookup
__link_path_walk
generic_file_llseek
current_fs_time
:openafs:afs_access
__mark_inode_dirty
do_path_lookup
getname
__user_walk_fd
vfs_lstat_fd


crash was in afs_FlushVCache


I'll collect something more complete info soon. Seems to be easily reproducible.

-- 
// Miles Davis - miles@cs.stanford.edu - http://www.cs.stanford.edu/~miles
// Computer Science Department - Computer Facilities
// Stanford University