ROBLEM:        (MCPM36085)     (Patch ID: OSF375-360052)
********
A "simple_lock: time limit exceeded" panic will be seen originating
from the ctape_close() routine.  The stack trace is as follows:

   6 panic("simple_lock: time limit exceeded")
   7 simple_lock_fault()
   8 simple_lock_time_violation()
   9 ctape_close()
  10 speclose()
  11 spec_close()
  12 ufsspec_close()
  13 vn_close()
  14 closef()
  15 close()
  16 syscall()
  17 _Xsyscall()

PROBLEM:        (UVO104133)     (Patch ID: OSF375-360052)
********
A "simple_lock: time limit exceeded" panic will be seen originating
from the ctape_strategy() routine.  The stack trace is as follows:

   9 panic("simple_lock: time limit exceeded")
  10 simple_lock_fault()
  11 simple_lock_time_violation()
  12 ccmn_rsq_ccb_bld()
  13 ctape_strategy()
  14 physio()
  15 ctape_write()
  16 spec_write()
  17 ufsspec_write()
  18 vn_write()
  19 rwuio()
  20 write()
  21 syscall()
  22 _Xsyscall()

PROBLEM:        (MCPMB61A4)     (Patch ID: OSF375-360078)
********
This patch fixes a "simple_lock: time limit exceeded".

The following is a list of the typical error messages displayed in the
preserved message buffer when the panic occurs:

  simple_lock: time limit exceeded

    pc of caller:         0xfffffc00005265ec
    lock address:         0xfffffc007f5f3ad0
    current lock state:   0x00000000005264c5 (cpu=0,pc=0xfffffc00005264c4,busy)

  panic (cpu 12): simple_lock: time limit exceeded

simple lock timeout pc?5i and lock address?5i

(dbx) 0xfffffc00005265ec?5i
  [ctape_close:2669, 0xfffffc00005265ec]        addq    r31, 0x4, r16
  [ctape_close:2669, 0xfffffc00005265f0]        bsr     r26, swap_ipl(line 131)
  [ctape_close:2669, 0xfffffc00005265f4]        stl     r0, 176(sp)
  [ctape_close:2669, 0xfffffc00005265f8]        bis     r9, r9, r16
  [ctape_close:2669, 0xfffffc00005265fc]        bsr     r26, simple_lock(line 266)
(dbx) 0xfffffc00005264c4?5i
  [ctape_close:2601, 0xfffffc00005264c4]        addq    r31, 0x4, r16
  [ctape_close:2601, 0xfffffc00005264c8]        bsr     r26, swap_ipl(line 131)
  [ctape_close:2601, 0xfffffc00005264cc]        stl     r0, 176(sp)
  [ctape_close:2601, 0xfffffc00005264d0]        bis     r9, r9, r16
  [ctape_close:2601, 0xfffffc00005264d4]        bsr     r26, simple_lock(line 26
6)

This indicates the code that was improperly holding the lock.

Stack Trace for this problem:

   panic("simple_lock: time limit exceeded") ["../../../../src/kernel/bsd/subr_prf.c":757]
   simple_lock_fault() ["../../../../src/kernel/kern/lock.c":1794]
   simple_lock_time_violation() ["../../../../src/kernel/kern/lock.c":1863]
   ctape_close() ["../../../../src/kernel/io/cam/ cam_tape.c":2669]
   speclose() ["../../../../src/kernel/vfs/spec_vnops.c":2306]
   spec_close() ["../../../../src/kernel/vfs/spec_vnops.c":2459]
   msfsspec_close() ["../../../../src/kernel/msfs/osf/msfs_vnops.c":3869]
   vn_close() ["../../../../src/kernel/vfs/vfs_vnops.c":1220]
   closef() ["../../../../src/kernel/bsd /kern_descrip.c":1393]
   close() ["../../../../src/kernel/bsd/kern_descrip.c":1071]

PROBLEM:  (QAR 56151)    (Patch ID: OSF375-206)
********
This patch fixes a problem where during tape operations, the SPACE commands can
not be interrupted.

PROBLEM:  (QAR 61716,QAR 56648)    (Patch ID: OSF375-218)
********
This patch fixes an ASE NFS problem that occurs on ASE systems with
KZPBA disk controllers. The system crashes with a "simple_lock timeout"
panic.

ASE NFS services send the aseagents for most or all nodes into an
uninterruptable state:

root@scully:/
 > ps -elf |grep aseagent
 8001 U <      0   318     1  0.0  39  -5 1.7M 3abf3580 16:02:21    0:00.58
/usr/sbin/aseagent -b -p hsm
 80808001 S  +     0  7566  6128  0.0  44   0 136K 3fe83894 08:04:42 0:00.0 0


A sample stack trace is as follows:

 >  0 thread_block() ["../../../../src/kernel/kern/sched_prim.c":2113,]
 1 mpsleep() ["../../../../src/kernel/bsd]
 2 cdisk_online(type_open = 0) ["../../../../src/kernel/io/cam/cam_disk.c":6769]
 3 cdisk_open() ["../../../../src/kernel/io/cam/cam_disk.c":6269]
 4 spec_open() ["../../../../src/kernel/vfs/spec_vnops.c":14]
 5 vn_open() ["../../../../src/ker]
 6 copen() ["../../]
 7 open() ["../../../../src/kerne]
 8 syscall() ["../../../../src/kernel/arch/alpha/syscall_trap.c":]
 9 _Xsyscall() ["../../../../src/kernel/arch/alpha/locore.s":1209,]

PROBLEM:  (QAR 59840)    (Patch ID: OSF375-241)
********
Under certain conditions, the message "ctape_strategy: READ case and density
info not valid." was being printed for every read from tape.  This change
will print the message only once.