[Differential] [Commented On] D1711: Changes to the callout code to restore active semantics and also add a test-framework and test to validate thecallout code (and potentially for use by other tests).

[hiren (hiren panchasara)]

hiren added a comment.

Another panic from an almost *idle* box:



  Sanitized panic #6
  
  Dump header from device /dev/da0s1b
    Architecture: amd64
    Architecture Version: 2
    Dump Length: 6525980672B (6223 MB)
    Blocksize: 512
    Dumptime: Thu Feb 19 06:16:57 2015
    Hostname: xxxxxxxxxxxxxxxxxx
    Magic: FreeBSD Kernel Dump
    Version String: FreeBSD 10.1-STABLE-llnw12 #0: Fri Feb 13 02:22:48 MST 2015
      jason at xxxxxxxxxxxx:/usr/obj/usr/src/sys/SIXFOUR
    Panic String: spin lock held too long
    Dump Parity: 1313546413
    Bounds: 0
    Dump Status: good
  
  Backtrace:
  Reading symbols from /boot/kernel/cc_cubic.ko.symbols...done.
  Loaded symbols for /boot/kernel/cc_cubic.ko.symbols
  Reading symbols from /boot/kernel/cc_cdg.ko.symbols...done.
  Loaded symbols for /boot/kernel/cc_cdg.ko.symbols
  Reading symbols from /boot/kernel/h_ertt.ko.symbols...done.
  Loaded symbols for /boot/kernel/h_ertt.ko.symbols
  Reading symbols from /boot/kernel/ftcp.ko...done.
  Loaded symbols for /boot/kernel/ftcp.ko
  #0  doadump (textdump=1) at pcpu.h:219
  	in pcpu.h
  (kgdb) #0  doadump (textdump=1) at pcpu.h:219
  #1  0xffffffff80749c17 in kern_reboot (howto=260)
      at /usr/src/sys/kern/kern_shutdown.c:452
  #2  0xffffffff80749ff4 in panic (fmt=<value optimized out>)
      at /usr/src/sys/kern/kern_shutdown.c:759
  #3  0xffffffff80735683 in _mtx_lock_spin_cookie (c=<value optimized out>, 
      tid=<value optimized out>, opts=<value optimized out>, 
      file=<value optimized out>, line=<value optimized out>)
      at /usr/src/sys/kern/kern_mutex.c:561
  #4  0xffffffff80af3fc1 in smp_tlb_shootdown (vector=246, 
      pmap=0xffffffff81391ae0, addr1=18446742009410568192, 
      addr2=18446742009410572288) at /usr/src/sys/amd64/amd64/mp_machdep.c:1145
  #5  0xffffffff80af5d3c in pmap_invalidate_range (pmap=<value optimized out>, 
      sva=<value optimized out>, eva=<value optimized out>)
      at /usr/src/sys/amd64/amd64/pmap.c:1480
  #6  0xffffffff807d57ef in vfs_vmio_release (bp=0xfffffe1f298bd000)
      at /usr/src/sys/kern/vfs_bio.c:1861
  #7  0xffffffff807d622b in getnewbuf (maxsize=<value optimized out>, 
      gbflags=<value optimized out>) at /usr/src/sys/kern/vfs_bio.c:2149
  #8  0xffffffff807d3791 in getblk (vp=0xfffff802a158f3b0, blkno=0, size=4096, 
      slpflag=0, slptimeo=0, flags=<value optimized out>)
      at /usr/src/sys/kern/vfs_bio.c:3210
  #9  0xffffffff807d41dd in breadn_flags (vp=0xfffff802a158f3b0, blkno=0, 
      size=0, rablkno=0x0, rabsize=0x0, cnt=0, cred=0xfffffe2020f6e670, 
      flags=0, bpp=0xfffffe2020f6e670) at /usr/src/sys/kern/vfs_bio.c:1127
  #10 0xffffffff8095c84a in ffs_blkatoff (vp=0x0, offset=0, res=0x0, 
      bpp=0xfffffe2020f6e7f8) at /usr/src/sys/ufs/ffs/ffs_subr.c:86
  #11 0xffffffff8096ef92 in ufs_readdir (ap=0xfffffe2020f6e900)
      at /usr/src/sys/ufs/ufs/ufs_vnops.c:2177
  #12 0xffffffff80c2af07 in VOP_READDIR_APV (vop=<value optimized out>, 
      a=<value optimized out>) at vnode_if.c:1821
  #13 0xffffffff807f9aaa in kern_getdirentries (td=0xfffff800230a8000, 
      fd=<value optimized out>, 
      buf=0x8022a9000 <Address 0x8022a9000 out of bounds>, 
      count=<value optimized out>, basep=0xfffffe2020f6e980, residp=0x0)
      at vnode_if.h:758
  #14 0xffffffff807f9888 in sys_getdirentries (td=0x0, uap=0xfffffe2020f6ea40)
      at /usr/src/sys/kern/vfs_syscalls.c:4030
  #15 0xffffffff80b059ca in amd64_syscall (td=0xfffff800230a8000, traced=0)
      at subr_syscall.c:134
  #16 0xffffffff80aeae3b in Xfast_syscall ()
      at /usr/src/sys/amd64/amd64/exception.S:396
  #17 0x0000000801588efa in ?? ()
  Current language:  auto; currently minimal
  (kgdb) 


@rrs This does not have your patch so we won't get any more interesting data but I wanted to show that we get the panic on almost idle boxes too. What does that tell us?

REVISION DETAIL
  https://reviews.freebsd.org/D1711

To: rrs, gnn, rwatson, lstewart, jhb, kostikbel, sbruno, imp, adrian, hselasky
Cc: julian, hiren, jhb, kostikbel, emaste, delphij, neel, erj, freebsd-net