try copying the uvm directory from netbsd-current to
your sandbox and rebuilding the kernel.
I got rid of a couple of uvm crashes by using the
netbsd-current uvm (as opposed to netbsd-1.5.2).
technically speaking, I haven't seen this problem and
cannot guarantee that the upgrade will solve the
problem.
regards
-kamal

--- Tad Hunt <tad@entrisphere.com> wrote:
> 
> I just got the following panic on our NetBSD 1.5.2
> i386 box.  I've attached
> the dmesg and hand-copied panic message and stack
> trace.
> 
> Any idea what caused this, and/or how to avoid it in
> the future?
> 
> -Tad
> 
>
-------------------------------------------------------------------------------
> panic: mapent_alloc: out of static map entries,
> check MAX_KMAPENT
> 
> Stopped in reaper at cpu_Debugger:0x4:	leave
> db> trace
> cpu_Debugger
> panic
> uvm_map_clip_end
> uvm_unmap_remove
> uvm_unmap
> uvm_km_free
> uvm_exit
> reaper
> start_reaper
> db>
> 
>
-------------------------------------------------------------------------------
> NetBSD 1.5.2 (GENERIC) #3: Sat Aug 18 23:37:05 CEST
> 2001
>    
>
he@hamster.urc.uninett.no:/usr/src/sys/arch/i386/compile/GENERIC
> cpu0: Intel (null) (686-class), 2188.18 MHz
> total memory = 2047 MB
> avail memory = 1894 MB
> using 11424 buffers containing 102 MB of memory
> BIOS32 rev. 0 found at 0xffe90
> mainbus0 (root)
> pci0 at mainbus0 bus 0: configuration mode 1
> pci0: i/o space, memory space enabled
> pchb0 at pci0 dev 0 function 0
> pchb0: Pequr Technology CMIC_HE Host (rev. 0x22)
> pchb1 at pci0 dev 0 function 1
> pchb1: Pequr Technology CMIC_HE Host (rev. 0x00)
> pci1 at pchb1 bus 1
> pci1: no spaces enabled!
> pchb2 at pci0 dev 0 function 2
> pchb2: Pequr Technology CMIC_HE Host (rev. 0x00)
> pci2 at pchb2 bus 8
> pci2: no spaces enabled!
> pchb3 at pci0 dev 0 function 3
> pchb3: Pequr Technology CMIC_HE Host (rev. 0x00)
> pci3 at pchb3 bus 255
> pci3: no spaces enabled!
> fxp0 at pci0 dev 4 function 0: Intel i82557
> Ethernet, rev 8
> fxp0: interrupting at irq 11
> fxp0: Ethernet address 00:06:5b:88:b0:1e, 10/100
> Mb/s
> inphy0 at fxp0 phy 1: i82555 10/100 media interface,
> rev. 4
> inphy0: 10baseT, 10baseT-FDX, 100baseTX,
> 100baseTX-FDX, auto
> ahc1 at pci0 dev 6 function 0
> ahc1: interrupting at irq 10
> ahc1: aic7890/91 Wide Channel A, SCSI Id=7, 16/255
> SCBs
> scsibus0 at ahc1 channel 0: 16 targets, 8 luns per
> target
> vga1 at pci0 dev 14 function 0: ATI Technologies
> product 0x4752 (rev. 0x27)
> wsdisplay0 at vga1: console (80x25, vt100 emulation)
> pchb4 at pci0 dev 15 function 0
> pchb4: Pequr Technology product 0x0201 (rev. 0x93)
> pci4 at pchb4 bus 1
> pci4: i/o space, memory space enabled
> unknown vendor 0x14e4 product 0x1644 (ethernet
> network, revision 0x14) at pci4 dev 6 function 0 not
> configured
> ppb0 at pci4 dev 8 function 0: Intel product 0x0309
> (rev. 0x01)
> pci5 at ppb0 bus 2
> pci5: i/o space, memory space enabled
> ahc2 at pci5 dev 6 function 0
> OptionMode = 3
> ahc2: interrupting at irq 11
> ahc2: aic7899 Wide Channel A, SCSI Id=7, 16/255 SCBs
> scsibus1 at ahc2 channel 0: 16 targets, 8 luns per
> target
> ahc3 at pci5 dev 6 function 1
> OptionMode = 3
> ahc3: interrupting at irq 10
> ahc3: aic7899 Wide Channel B, SCSI Id=7, 16/255 SCBs
> scsibus2 at ahc3 channel 0: 16 targets, 8 luns per
> target
> pciide0 at pci0 dev 15 function 1: Pequr Technology
> product 0x0212 (rev. 0x93)
> pciide0: bus-master DMA support present, but unused
> (no driver support)
> pciide0: primary channel configured to compatibility
> mode
> pciide0: primary channel interrupting at irq 14
> atapibus0 at pciide0 channel 0
> cd0 at atapibus0 drive 0: <SAMSUNG CD-ROM SN-124, ,
> N102> type 5 cdrom removable
> cd0: drive supports PIO mode 4, DMA mode 2,
> Ultra-DMA mode 2
> pciide0: secondary channel wired to compatibility
> mode
> pciide0: secondary channel ignored (not responding;
> disabled or no drives?)
> pcib0 at pci0 dev 15 function 3
> pcib0: Pequr Technology product 0x0225 (rev. 0x00)
> pchb5 at pci0 dev 16 function 0
> pchb5: Pequr Technology CIOB30 (rev. 0x03)
> pci6 at pchb5 bus 1
> pci6: memory space enabled
> unknown vendor 0x14e4 product 0x1644 (ethernet
> network, revision 0x14) at pci6 dev 6 function 0 not
> configured
> ppb1 at pci6 dev 8 function 0: Intel product 0x0309
> (rev. 0x01)
> pci7 at ppb1 bus 2
> pci7: memory space enabled
> ahc4 at pci7 dev 6 function 0: unable to map
> registers
> ahc5 at pci7 dev 6 function 1: unable to map
> registers
> pchb6 at pci0 dev 16 function 2
> pchb6: Pequr Technology CIOB30 (rev. 0x03)
> pci8 at pchb6 bus 3
> pci8: memory space enabled
> pchb7 at pci0 dev 17 function 0
> pchb7: Pequr Technology CIOB30 (rev. 0x03)
> pci9 at pchb7 bus 8
> pci9: memory space enabled
> ppb2 at pci9 dev 6 function 0: Digital Equipment
> DECchip 21152 PCI-PCI Bridge (rev. 0x03)
> pci10 at ppb2 bus 9
> pci10: memory space enabled
> fxp1 at pci10 dev 4 function 0: Intel i82557
> Ethernet, rev 5
> fxp1: interrupting at irq 5
> fxp1: Ethernet address 00:02:b3:ac:8e:4a, 10/100
> Mb/s
> inphy1 at fxp1 phy 1: i82555 10/100 media interface,
> rev. 0
> inphy1: 10baseT, 10baseT-FDX, 100baseTX,
> 100baseTX-FDX, auto
> fxp2 at pci10 dev 5 function 0: Intel i82557
> Ethernet, rev 5
> fxp2: interrupting at irq 11
> fxp2: Ethernet address 00:02:b3:ac:8e:4b, 10/100
> Mb/s
> inphy2 at fxp2 phy 1: i82555 10/100 media interface,
> rev. 0
> inphy2: 10baseT, 10baseT-FDX, 100baseTX,
> 100baseTX-FDX, auto
> pchb8 at pci0 dev 17 function 2
> pchb8: Pequr Technology CIOB30 (rev. 0x03)
> pci11 at pchb8 bus 14
> pci11: memory space enabled
> isa0 at pcib0
> com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a,
> working fifo
> com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a,
> working fifo
> pckbc0 at isa0 port 0x60-0x64
> pckbd0 at pckbc0 (kbd slot)
> pckbc0: using irq 1 for kbd slot
> wskbd0 at pckbd0: console keyboard, using wsdisplay0
> pmsi0 at pckbc0 (aux slot)
> pckbc0: using irq 12 for aux slot
> wsmouse0 at pmsi0 mux 0
> lpt0 at isa0 port 0x378-0x37b irq 7
> pcppi0 at isa0 port 0x61
> midi0 at pcppi0: PC speaker
> sysbeep0 at pcppi0
> isapnp0 at isa0 port 0x279: ISA Plug 'n Play device
> support
> npx0 at isa0 port 0xf0-0xff: using exception 16
> fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
> fd0 at fdc0 drive 0: 1.44MB, 80 cyl, 2 head, 18 sec
> isapnp0: no ISA Plug 'n Play devices found
> biomask ef45 netmask ef65 ttymask ffe7
> scsibus0: waiting 2 seconds for devices to settle...
> scsibus1: waiting 2 seconds for devices to settle...
> ahc2: target 0 using 16bit transfers
> ahc2: target 0 synchronous at 40.0MHz, offset = 0x3f
> ahc2: target 0 using tagged queuing
> sd0 at scsibus1 target 0 lun 0: <SEAGATE,
> ST373405LC, 2203> SCSI3 0/direct fixed
> sd0: 70007 MB, 29550 cyl, 8 head, 606 sec, 512
> bytes/sect x 143374650 sectors
> ahc2: target 6 using 8bit transfers
> ahc2: target 6 using asynchronous transfers
> ses0 at scsibus1 target 6 lun 0: <PE/PV, 1x8 SCSI
> BP, 0.25> SCSI2 3/processor fixed
> ses0: SAF-TE Compliant Device
> scsibus2: waiting 2 seconds for devices to settle...
> 
=== message truncated ===


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