Date: Mon, 13 Feb 2006 11:26:14 -0600 From: "Douglas K. Rand" <rand@meridian-enviro.com> To: freebsd-alpha@freebsd.org Subject: SMP problem on UP2000+ Message-ID: <87u0b35fwp.wl%rand@meridian-enviro.com>
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I have a UP2000+ system from Microway with two 833 MHz CPUs, and it
keeps freezing up on me when I run it with a SMP kernel. The hangs
always seem to come at times of high disk IO, such as nightly backups
or heavy MySQL usage or buildworlds. (The system does my cacti
resource graphing.) I've got a debug kernel installed, but I can
never break into the kernel nor do I ever get a core dump. I've
experienced this problem with both 6.0 and 6_RELENG.
I'm coming up on 4 days of uptime with a kernel that doesn't have SMP
which is easily four times that of a kernel with SMP.
I was running a gmirror of two 75 GB SCSI disks on the onboard
controller, and to simply see if it was a factor I destroyed the
mirror and am now only using one disk. I had hangs both with and with
gmirror.
Here are the messgaes I get on the console, when I get them. Sometimes
the system simply hangs.
panic: lockmgr: thread 0xfffffc007d9c4d20, not exclusive lock holder 0xfffffc007d9d5260 unlocking
cpuid = 1
fatal kernel trap:
trap entry = 0x2 (memory management fault)
cpuid = 0
faulting va = 0x48
type = access violation
cause = load instructon
pc = 0xfffffc0000566978
ra = 0xfffffc0000566958
sp = 0xfffffe00319779f0
curthread = 0xfffffc007d99aa80
pid = 35, comm = syncer
panic: trap
cpuid = 0
Uptime: 15d15h9m11s
fatal kernel trap:
trap entry = 0x2 (memory management fault)
cpuid = 0
faulting va = 0x48
type = access violation
cause = load instructon
pc = 0xfffffc0000566978
ra = 0xfffffc0000566958
sp = 0xfffffe0031977638
curthread = 0xfffffc007d99aa80
pid = 35, comm = syncer
panic: trap
cpuid = 0
********************************************************************************
panic: lockmgr: thread 0xfffffc007d9fcd20, not exclusive lock holder 0xfffffc0056380540 unlocking
cpuid = 1
fatal kernel trap:
trap entry = 0x2 (memory management fault)
cpuid = 0
faulting va = 0x48
type = access violation
cause = load instructon
pc = 0xfffffc00004595b8
ra = 0xfffffc0000459598
sp = 0xfffffe0031943af0
curthread = 0xfffffc007d9fe540
pid = 31, comm = syncer
********************************************************************************
panic: lockmgr: thread 0xfffffc007d9fcd20, not exclusive lock holder 0xfffffc0052d76fc0 unlocking
cpuid = 1
fatal kernel trap:
trap entry = 0x2 (memory management fault)
cpuid = 0
faulting va = 0x48
type = access violation
cause = load instructon
pc = 0xfffffc00004595b8
ra = 0xfffffc0000459598
sp = 0xfffffe0031943af0
curthread = 0xfffffc007d9fe540
pid = 31, comm = syncer
********************************************************************************
panic: lockmgr: thread 0xfffffc007d9dad20, not exclusive lock holder 0xfffffc00596987e0 unlocking
cpuid = 1
fatal kernel trap:
trap entry = 0x2 (memory management fault)
cpuid = 1
faulting va = 0x48
type = access violation
cause = load instructon
pc = 0xfffffc000045a728
ra = 0xfffffc000045a708
sp = 0xfffffe003193baf0
curthread = 0xfffffc007d9dc2a0
pid = 30, comm = syncer
********************************************************************************
fatal kernel trap:
trap entry = 0x2 (memory management fault)
cpuid = 0
faulting va = 0x48
type = access violation
cause = load instructon
pc = 0xfffffc000045a728
ra = 0xfffffc000045a708
sp = 0xfffffe0031983c30
curthread = 0xfffffc007d9a8540
pid = 21, comm = intr: ahc0
********************************************************************************
panic: lockmgr: thread 0xfffffc0063496d20, not exclusive lock holder 0xfffffc0064bac540 unlocking
cpuid = 0
********************************************************************************
panic: lockmgr: thread 0xfffffc00649c47e0, not exclusive lock holder 0xfffffc0058020fc0 unlocking
cpuid = 1
fatal kernel trap:
trap entry = 0x2 (memory management fault)
cpuid = 1
faulting va = 0x48
type = access violation
cause = load instructon
pc = 0xfffffc0000491e08
ra = 0xfffffc0000491de8
sp = 0xfffffe0031935b30
curthread = 0xfffffc007da1e7e0
pid = 32, comm = syncer
********************************************************************************
panic: lockmgr: thread 0xfffffc007da1cd20, not exclusive lock holder 0xfffffc0063ffc000 unlocking
cpuid = 1
********************************************************************************
panic: lockmgr: thread 0xfffffc007d9eba40, not exclusive lock holder 0xfffffc005e7e4fc0 unlocking
cpuid = 1
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