PROBLEM: NFS client hangs when X is running (2.4.20)

PROBLEM: NFS client hangs when X is running (2.4.20)

[Greg Wooledge]

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[1.] NFS client hangs when X is running (2.4.20)

[2.] The NFS client is running Linux 2.4.20 (but I also saw this same
problem on another system running 2.4.18).  The NFS server is running
OpenBSD 3.2.  Both are i386 systems.  I mount /home from the OpenBSD
system onto the Linux system with option "nolock".  Everything is
OK until I start X.  About 15 to 30 seconds after X starts, the NFS
mount hangs.  Any process which attempts to do anything to any file
on the NFS file system goes into catatonia and cannot be killed
(even with -9; ps shows 'D' for state).

This problem does not occur with any 2.2.x kernel.  I have tried building
2.4.20 with and without CONFIG_NFS_V3 enabled; same results.

[3.] Keywords: NFS client 2.4.20 OpenBSD XFree86 hang lock crash catatonic

[4.] Linux version 2.4.20 (root@griffon) (gcc version 2.95.4 20011002 (Debian prerelease)) #1 Fri Apr 11 18:37:04 EDT 2003

[5.] nfs: server pegasus not responding, still trying
However, this is erroneous.  Pegasus (the OpenBSD box) responds
perfectly to ping, showmount -e, ssh and so on.  Any existing ssh
connections to pegasus continue working, even ones I started in an
rxvt window in the 15-30 second period when the NFS subsystem hadn't
locked up yet.  No other errors are reported.

[6.] mount /home; startx; sleep 30

[7.1] (Note: I modified Makefile to use gcc 2.95 instead of 3.2)
Gnu C                  3.2.3
Gnu make               3.80
util-linux             2.11z
mount                  2.11z
modutils               2.4.21
e2fsprogs              1.33-WIP
PPP                    2.4.1
Linux C Library        2.3.1
Dynamic linker (ldd)   2.3.1
Procps                 3.1.8
Net-tools              1.60
Console-tools          0.2.3
Sh-utils               4.5.10
Modules Loaded         serial 3c59x

[7.2]
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 6
model           : 8
model name      : AMD Athlon(tm) XP 2000+
stepping        : 0
cpu MHz         : 1667.388
cache size      : 256 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow
bogomips        : 3329.22

[7.3]
serial                 42436   0 (autoclean)
3c59x                  25040   1

[7.4]
0000-001f : dma1
0020-003f : pic1
0040-005f : timer
0060-006f : keyboard
0080-008f : dma page reg
00a0-00bf : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0376-0376 : ide1
03c0-03df : vga+
03f6-03f6 : ide0
03f8-03ff : serial(set)
0cf8-0cff : PCI conf1
c000-cfff : PCI Bus #01
  c000-c0ff : PCI device 1002:4966 (ATI Technologies Inc)
d000-d01f : Creative Labs SB Live! EMU10k1
d400-d407 : Creative Labs SB Live! MIDI/Game Port
d800-d87f : 3Com Corporation 3c905C-TX/TX-M [Tornado]
  d800-d87f : 00:0b.0
dc00-dc1f : VIA Technologies, Inc. USB
e000-e01f : VIA Technologies, Inc. USB (#2)
e400-e41f : VIA Technologies, Inc. USB (#3)
e800-e80f : VIA Technologies, Inc. VT82C586B PIPC Bus Master IDE
  e800-e807 : ide0
  e808-e80f : ide1
ec00-ecff : VIA Technologies, Inc. VT6102 [Rhine-II]

00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000d0000-000d07ff : Extension ROM
000f0000-000fffff : System ROM
00100000-1ffeffff : System RAM
  00100000-00243dd0 : Kernel code
  00243dd1-002c3e23 : Kernel data
1fff0000-1fff2fff : ACPI Non-volatile Storage
1fff3000-1fffffff : ACPI Tables
c0000000-cfffffff : PCI device 1106:3189 (VIA Technologies, Inc.)
d0000000-dfffffff : PCI Bus #01
  d0000000-d7ffffff : PCI device 1002:4966 (ATI Technologies Inc)
  d8000000-dfffffff : PCI device 1002:496e (ATI Technologies Inc)
e0000000-e00fffff : PCI Bus #01
  e0020000-e002ffff : PCI device 1002:4966 (ATI Technologies Inc)
  e0030000-e003ffff : PCI device 1002:496e (ATI Technologies Inc)
e0120000-e012007f : 3Com Corporation 3c905C-TX/TX-M [Tornado]
e0121000-e01210ff : VIA Technologies, Inc. USB 2.0
  e0121000-e01210ff : ehci-hcd
e0122000-e01220ff : VIA Technologies, Inc. VT6102 [Rhine-II]
fec00000-fec00fff : reserved
fee00000-fee00fff : reserved
ffff0000-ffffffff : reserved

[7.5]
00:00.0 Host bridge: VIA Technologies, Inc. VT8377 [KT400 AGP] Host Bridge
	Subsystem: ABIT Computer Corp.: Unknown device 1401
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR-
	Latency: 8
	Region 0: Memory at c0000000 (32-bit, prefetchable) [size=256M]
	Capabilities: [a0] AGP version 2.0
		Status: RQ=32 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW- AGP3- Rate=x1,x2,x4
		Command: RQ=32 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit- FW- Rate=<none>
	Capabilities: [c0] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:01.0 PCI bridge: VIA Technologies, Inc. VT8235 PCI Bridge (prog-if 00 [Normal decode])
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B-
	Status: Cap+ 66Mhz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ >SERR- <PERR-
	Latency: 0
	Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
	I/O behind bridge: 0000c000-0000cfff
	Memory behind bridge: e0000000-e00fffff
	Prefetchable memory behind bridge: d0000000-dfffffff
	BridgeCtl: Parity- SERR- NoISA+ VGA+ MAbort- >Reset- FastB2B-
	Capabilities: [80] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0a.0 Multimedia audio controller: Creative Labs SB Live! EMU10k1 (rev 0a)
	Subsystem: Creative Labs: Unknown device 8065
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32 (500ns min, 5000ns max)
	Interrupt: pin A routed to IRQ 3
	Region 0: I/O ports at d000 [size=32]
	Capabilities: [dc] Power Management version 1
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0a.1 Input device controller: Creative Labs SB Live! MIDI/Game Port (rev 0a)
	Subsystem: Creative Labs Gameport Joystick
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32
	Region 0: I/O ports at d400 [size=8]
	Capabilities: [dc] Power Management version 1
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:0b.0 Ethernet controller: 3Com Corporation 3c905C-TX/TX-M [Tornado] (rev 78)
	Subsystem: 3Com Corporation 3C905C-TX Fast Etherlink for PC Management NIC
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32 (2500ns min, 2500ns max), cache line size 08
	Interrupt: pin A routed to IRQ 10
	Region 0: I/O ports at d800 [size=128]
	Region 1: Memory at e0120000 (32-bit, non-prefetchable) [size=128]
	Expansion ROM at <unassigned> [disabled] [size=128K]
	Capabilities: [dc] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=2 PME-

00:10.0 USB Controller: VIA Technologies, Inc. USB (rev 80) (prog-if 00 [UHCI])
	Subsystem: ABIT Computer Corp.: Unknown device 1401
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32, cache line size 08
	Interrupt: pin A routed to IRQ 11
	Region 4: I/O ports at dc00 [size=32]
	Capabilities: [80] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:10.1 USB Controller: VIA Technologies, Inc. USB (rev 80) (prog-if 00 [UHCI])
	Subsystem: ABIT Computer Corp.: Unknown device 1401
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32, cache line size 08
	Interrupt: pin B routed to IRQ 3
	Region 4: I/O ports at e000 [size=32]
	Capabilities: [80] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:10.2 USB Controller: VIA Technologies, Inc. USB (rev 80) (prog-if 00 [UHCI])
	Subsystem: ABIT Computer Corp.: Unknown device 1401
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32, cache line size 08
	Interrupt: pin C routed to IRQ 5
	Region 4: I/O ports at e400 [size=32]
	Capabilities: [80] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82) (prog-if 20 [EHCI])
	Subsystem: ABIT Computer Corp.: Unknown device 1401
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32, cache line size 08
	Interrupt: pin D routed to IRQ 10
	Region 0: Memory at e0121000 (32-bit, non-prefetchable) [size=256]
	Capabilities: [80] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:11.0 ISA bridge: VIA Technologies, Inc. VT8235 ISA Bridge
	Subsystem: VIA Technologies, Inc. VT8235 ISA Bridge
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping+ SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0
	Capabilities: [c0] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:11.1 IDE interface: VIA Technologies, Inc. VT82C586/B/686A/B PIPC Bus Master IDE (rev 06) (prog-if 8a [Master SecP PriP])
	Subsystem: VIA Technologies, Inc. VT8235 Bus Master ATA133/100/66/33 IDE
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32
	Interrupt: pin A routed to IRQ 0
	Region 4: I/O ports at e800 [size=16]
	Capabilities: [c0] Power Management version 2
		Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 74)
	Subsystem: ABIT Computer Corp.: Unknown device 1401
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32 (750ns min, 2000ns max), cache line size 08
	Interrupt: pin A routed to IRQ 11
	Region 0: I/O ports at ec00 [size=256]
	Region 1: Memory at e0122000 (32-bit, non-prefetchable) [size=256]
	Capabilities: [40] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

01:00.0 VGA compatible controller: ATI Technologies Inc Radeon R250 If [Radeon 9000] (rev 01) (prog-if 00 [VGA])
	Subsystem: PC Partner Limited: Unknown device 7197
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping+ SERR- FastB2B-
	Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 32 (2000ns min), cache line size 08
	Interrupt: pin A routed to IRQ 11
	Region 0: Memory at d0000000 (32-bit, prefetchable) [size=128M]
	Region 1: I/O ports at c000 [size=256]
	Region 2: Memory at e0020000 (32-bit, non-prefetchable) [size=64K]
	Expansion ROM at <unassigned> [disabled] [size=128K]
	Capabilities: [58] AGP version 2.0
		Status: RQ=48 Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64- HTrans- 64bit- FW+ AGP3- Rate=x1,x2,x4
		Command: RQ=1 ArqSz=0 Cal=0 SBA+ AGP- GART64- 64bit- FW- Rate=<none>
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

01:00.1 Display controller: ATI Technologies Inc Radeon R250 [Radeon 9000] (Secondary) (rev 01)
	Subsystem: PC Partner Limited: Unknown device 7196
	Control: I/O- Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping+ SERR- FastB2B-
	Status: Cap+ 66Mhz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Region 0: Memory at d8000000 (32-bit, prefetchable) [disabled] [size=128M]
	Region 1: Memory at e0030000 (32-bit, non-prefetchable) [disabled] [size=64K]
	Capabilities: [50] Power Management version 2
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-)
		Status: D0 PME-Enable- DSel=0 DScale=0 PME-

[7.6] cat: /proc/scsi/scsi: No such file or directory

[7.7] The NFS client is a Debian unstable system.
ii  nfs-common     1.0.3-1        NFS support files common to client and serve
ii  portmap        5-2            The RPC portmapper

-- 
Greg Wooledge                  |   "Truth belongs to everybody."
greg@wooledge.org              |    - The Red Hot Chili Peppers
http://wooledge.org/~greg/     |

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Re: PROBLEM: NFS client hangs when X is running (2.4.20)

[Trond Myklebust]

>>>>> " " == Greg Wooledge <greg@wooledge.org> writes:


Sounds very much like a network card driver problem.

     > [5.] nfs: server pegasus not responding, still trying However,
     > this is erroneous.  Pegasus (the OpenBSD box) responds
     > perfectly to ping, showmount -e, ssh and so on.  Any existing
     > ssh connections to pegasus continue working, even ones I
     > started in an rxvt window in the 15-30 second period when the
     > NFS subsystem hadn't locked up yet.  No other errors are
     > reported.

.... and a tcpdump would show?

Cheers,
  Trond

Re: PROBLEM: NFS client hangs when X is running (2.4.20)

[Greg Wooledge]

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Trond Myklebust (trond.myklebust@fys.uio.no) wrote:

> Sounds very much like a network card driver problem.

I don't think so, simply because this has happened to me on two
compeletely different Linux systems.  One (griffon) has a 3c59x
card, and the other (dwarf) had a tulip and an ne2k-pci.

(Or did you mean on the server side?  The OpenBSD box is using two
RTL 8139 cards.)

>      > [5.] nfs: server pegasus not responding, still trying However,
>      > this is erroneous.  Pegasus (the OpenBSD box) responds
>      > perfectly to ping, showmount -e, ssh and so on.  Any existing
>      > ssh connections to pegasus continue working, even ones I
>      > started in an rxvt window in the 15-30 second period when the
>      > NFS subsystem hadn't locked up yet.  No other errors are
>      > reported.
> 
> .... and a tcpdump would show?

I haven't tried that yet, but after discussing this with another
person who was having the same problems, we learned that OpenBSD's
firewall (pf) was blocking the Linux packets when configured with
"scrub in all" (which is recommended in the OpenBSD FAQs).

After commenting out the "scrub in all" and rebooting back to 2.4.20,
I have X and NFS working simultaneously.

-- 
Greg Wooledge                  |   "Truth belongs to everybody."
greg@wooledge.org              |    - The Red Hot Chili Peppers
http://wooledge.org/~greg/     |

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