[JFFS2] Running fsstress on JFFS2 causing freeze
rohit h
hrohit85 at gmail.com
Tue Apr 15 08:11:01 EDT 2008
Hello everyone.
I am running a filesystem testing application "fsstress" on JFFS2.
The JFFS2 code is from linux-2.6.22 kernel.All the processes spawned
by fsstress do filesystem operations on the JFFS2 partition.After some
time all the processes go into "UNINTERRUPTIBLE SLEEP" state as shown.
bash-2.05a# ps -aux
PID Uid VmSize Stat Command
1 root 140 S init [3]
2 root SW< [kthreadd]
3 root SWN [ksoftirqd/0]
4 root SW< [watchdog/0]
5 root SW< [events/0]
6 root SW< [khelper]
36 root SW< [kblockd/0]
37 root SW< [omap2_mcspi/0]
53 root SW [pdflush]
54 root SW< [kswapd0]
55 root SW< [aio/0]
156 root SW< [mtdblockd]
166 root SW< [kmmcd]
170 root SW< [rpciod/0]
186 root 260 S /sbin/syslogd
191 root 120 S /usr/sbin/inetd
197 root 892 S /bin/bash
200 root SWN [jffs2_gcd_mtd1]
201 root 208 S /tools/fsstress -p 8 -n 100000 -d /tmp -l 0
312 root 280 D /tools/fsstress -p 8 -n 100000 -d /tmp -l 0
313 root 372 D /tools/fsstress -p 8 -n 100000 -d /tmp -l 0
314 root 392 D /tools/fsstress -p 8 -n 100000 -d /tmp -l 0
315 root 488 D /tools/fsstress -p 8 -n 100000 -d /tmp -l 0
316 root 388 D /tools/fsstress -p 8 -n 100000 -d /tmp -l 0
317 root 376 D /tools/fsstress -p 8 -n 100000 -d /tmp -l 0
318 root 404 D /tools/fsstress -p 8 -n 100000 -d /tmp -l 0
319 root 396 D /tools/fsstress -p 8 -n 100000 -d /tmp -l 0
337 root 684 R ps -aux
I checked the entry in /proc/process_id/wchan for each of the sleeping
processes.
( wchan gives the function the process is currently executing ).
Here is the output:
jffs2_garbage_collect_thread -> this is for jffs2_gcd_mtd1
do_wait
jffs2_mknod
jffs2_do_link
lock_rename
jffs2_write_inode_range
lock_rename
lock_rename
lock_rename
lock_rename
I have the feel that there is a deadlock.
Does anybody have any idea about this?
Thanks,
Rohit
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