Date: Sun, 22 Aug 1999 17:23:40 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Luoqi Chen <luoqi@watermarkgroup.com> Cc: freebsd-smp@FreeBSD.ORG Subject: Weird infinite lockup in splx() (in IFCPL_UNLOCK) w/ latest CURRENT/SMP Message-ID: <199908230023.RAA00824@apollo.backplane.com>
next in thread | raw e-mail | index | archive | help
I had a weird lockup w/ the latest CURRENT while doing an installworld.
I tracked the lockup down to an infinite loop in the current process...
an infinite loop in splx()!
I've never had this lockup before so I believe it to be due to
some recent change. The lockup occured during very heavy use of
the lockmgr on the same vnode lock (the uudecode binary) during a
parallel installworld.
My kernel was as of today, 22Aug. This is on a 2xPIII/450 SMP box.
I believe there to be a race condition somewhere.
-Matt
...
#9 0xc021f1e6 in scgetc (sc=0xc02a37e0, flags=2)
at ../../dev/syscons/syscons.c:3782
#10 0xc021aef1 in sckbdevent (thiskbd=0xc02b4d20, event=0, arg=0xc02a37e0)
at ../../dev/syscons/syscons.c:663
#11 0xc021481f in atkbd_intr (kbd=0xc02b4d20, arg=0x0)
at ../../dev/kbd/atkbd.c:439
#12 0xc024b764 in atkbd_isa_intr (arg=0xc02b4d20) at ../../isa/atkbd_isa.c:123
#13 0xc0243194 in splx (ipl=3224034576) at ../../i386/isa/ipl_funcs.c:275
^^^^^^^ it was looping splx, in IFCPL_UNLOCK.
#14 0xc014c158 in lockmgr (lkp=0xc02add10, flags=2, interlkp=0x0, p=0xcc745ec0)
at ../../kern/kern_lock.c:360
#15 0xc0205513 in kmem_alloc_wait (map=0xc02add10, size=69632)
at ../../vm/vm_kern.c:436
#16 0xc0149375 in execve (p=0xcc745ec0, uap=0xcc7a3f80)
at ../../kern/kern_exec.c:126
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-smp" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199908230023.RAA00824>