SBUG splat rwlock test 1

[behlendorf]

CentOS 5.4 with kernel
2.6.18-194.3.1.el5

SPL test fails on
splat -a
rwlock:N-rd/1-wr
Message from syslogd@ at Sat May 29 12:23:16 2010 ...
localhost kernel: SPLError: 19477:0:(splat-rwlock.c:291:splat_rwlock_test1()) SBUG

[behlendorf]

Vadimtk is this failure consistently reproducible and is this the x86 or x86_64 kernel?

[vadimtk]

It is x86_64 kernel.
I tried only once, and process slat -a seems hang after that failure ( no more progress in 2 hours). Also I can't kill it with kill -9. I am rebooting server and will try again,

[vadimtk]

After reboot the same issue.

There is part from dmesg:

SPL: Loaded Solaris Porting Layer v0.4.9
SPLAT: Loaded Solaris Porting LAyer Tests v0.4.9
VERIFY(!RW_LOCK_HELD(&(rwp->rw_rwlock))) failed
SPLError: 4063:0:(splat-rwlock.c:291:splat_rwlock_test1()) SBUG
SPL: Showing stack for process 4063

Call Trace:
[] :spl:spl_debug_bug+0x8c/0xc5
[] :splat:splat_rwlock_test1+0x3c6/0x3e3
[] :splat:splat_ioctl+0x52b/0x5de
[] do_ioctl+0x55/0x6b
[] vfs_ioctl+0x457/0x4b9
[] audit_syscall_entry+0x180/0x1b3
[] sys_ioctl+0x59/0x78
[] tracesys+0xd5/0xe0

SPL: Dumping log to /tmp/spl-log.1275179140.4063

[behlendorf]

Thanks for the debug info Vadimtk. When I get a little time I'll try out the kernel your having trouble with and try and run this to ground.

[cian]

I have reproduced this issue here:

System Info:
CentOS release 5.5 (Final)
Kernel 2.6.18-194.3.1.el5.centos.plus on an x86_64

###Console###
SPL: Loaded Solaris Porting Layer v0.4.9
VERIFY(!RW_LOCK_HELD(&(rwp->rw_rwlock))) failed
SPLError: 18026:0:(splat-rwlock.c:291:splat_rwlock_test1()) SBUG
SPL: Showing stack for process 18026

Call Trace:
[] :spl:spl_debug_bug+0x8c/0xc5
[] :splat:splat_rwlock_test1+0x3c6/0x3e3
[] :splat:splat_ioctl+0x52b/0x5de
[] do_ioctl+0x55/0x6b
[] vfs_ioctl+0x457/0x4b9
[] sys_ioctl+0x59/0x78
[] tracesys+0xd5/0xe0

SPL: Dumping log to /tmp/spl-log.1277060694.18026

Message from syslogd@ at Sun Jun 20 20:04:54 2010 ...
lazur kernel: SPLError: 18026:0:(splat-rwlock.c:291:splat_rwlock_test1()) SBUG
###End Console###

###splat -a###
$ sudo ./splat -a
------------------------------ Running SPLAT Tests ------------------------------
kmem:kmem_alloc Pass
kmem:kmem_zalloc Pass
kmem:vmem_alloc Pass
kmem:vmem_zalloc Pass
kmem:slab_small Pass
kmem:slab_large Pass
kmem:slab_align Pass
kmem:slab_reap Pass
kmem:slab_age Pass
kmem:slab_lock Pass
kmem:slab_overcommit Pass
kmem:vmem_size Pass
taskq:single Pass
taskq:multiple Pass
taskq:system Pass
taskq:wait Pass
taskq:order Pass
krng:freq Pass
mutex:tryenter Pass
mutex:race Pass
mutex:owned Pass
mutex:owner Pass
condvar:signal1 Pass
condvar:broadcast1 Pass
condvar:signal2 Pass
condvar:broadcast2 Pass
condvar:timeout Pass
thread:create Pass
thread:exit Pass
rwlock:N-rd/1-wr
Message from syslogd@ at Sun Jun 20 20:04:54 2010 ...
lazur kernel: SPLError: 18026:0:(splat-rwlock.c:291:splat_rwlock_test1()) SBUG

###End Splat###

###hexdump -C /tmp/spl-log.1277060694.18026
00000000 57 00 00 00 00 00 00 00 00 00 00 00 10 00 00 00 |W...............|
00000010 02 00 00 00 56 66 1e 4c 5b ba 00 00 00 00 00 00 |....Vf.L[.......|
00000020 00 00 00 00 6a 46 00 00 23 01 00 00 00 00 00 00 |....jF..#.......|
00000030 73 70 6c 61 74 2d 72 77 6c 6f 63 6b 2e 63 00 73 |splat-rwlock.c.s|
00000040 70 6c 61 74 5f 72 77 6c 6f 63 6b 5f 74 65 73 74 |plat_rwlock_test|
00000050 31 00 53 42 55 47 0a |1.SBUG.|
00000057

[behlendorf]

Fixed by commit 46aa7b3.