Date: Sun, 22 Aug 1999 21:04:34 -0700 (PDT) From: Matthew Dillon <dillon@apollo.backplane.com> To: Alan Cox <alc@cs.rice.edu> Cc: Luoqi Chen <luoqi@watermarkgroup.com>, freebsd-smp@FreeBSD.ORG Subject: Re: Weird infinite lockup in splx() (in IFCPL_UNLOCK) w/ latest CURRENT/SMP Message-ID: <199908230404.VAA01611@apollo.backplane.com> References: <199908230023.RAA00824@apollo.backplane.com> <19990822213421.E47586@nonpc.cs.rice.edu>
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:> #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.
:>
:
:Are you sure about this? There's no loop in IFCPL_UNLOCK or splx (proper)
:for that matter. Only the IFCPL_LOCK at the beginning and the splz at
:the end contain loops within them.
:
:> #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
All I can think of is that kmem_alloc_wait() is in a tight loop which
means that the tsleep() call is not sleeping the process.
cold isn't set, panicstr is from my 'panic from debugger' after the
fact. priority is PVM so PCATCH isn't set. I am at a complete loss.
-Matt
Matthew Dillon
<dillon@backplane.com>
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