Are you sure?
In one of 10 cases when starting Acrobat Reader when the home directory
resides on a NFS4 mounted device on the server we get:
[17179998.068000] ------------[ cut here ]------------
[17180985.572000] kernel BUG at fs/locks.c:1935!
[17180985.572000] invalid operand: 0000 [#9]
[17180985.572000] PREEMPT
[17180985.572000] Modules linked in: rfcomm l2cap bluetooth ppdev
cpufreq_userspace cpufreq_stats freq_table cpufreq_powersave cpufreq_ondemand
cpufreq_conservative video tc1100_wmi sony_acpi pcc_acpi hotkey dev_acpi
container button acpi_sbs battery ac i2c_acpi_ec nfsd exportfs dm_mod md_mod
it87 hwmon_vid i2c_isa i2c_viapro lp nvidia agpgart tsdev snd_intel8x0
snd_ac97_codec snd_ac97_bus snd_pcm_oss snd_mixer_oss snd_pcm snd_mpu401
snd_mpu401_uart snd_rawmidi snd_seq_device parport_pc floppy snd_timer parport
i2c_nforce2 i2c_core snd psmouse pcspkr rtc serio_raw shpchp pci_hotplug
soundcore snd_page_alloc nfs lockd sunrpc sg evdev ipv6 ext3 jbd ide_generic
ohci1394 ieee1394 ehci_hcd ohci_hcd usbcore forcedeth ide_cd cdrom generic
amd74xx sd_mod sata_nv libata scsi_mod thermal processor fan fbcon tileblit
font bitblit softcursor capability commoncap
[17180985.572000] CPU: 0
[17180985.572000] EIP: 0060:[<c017770f>] Tainted: P VLI
[17180985.572000] EFLAGS: 00010246 (2.6.15-26-386)
[17180985.572000] EIP is at locks_remove_flock+0xcf/0xf0
[17180985.572000] eax: c214b754 ebx: c214b7ac ecx: 00000000 edx: 00000000
[17180985.572000] esi: f58b18c0 edi: f589defc ebp: f62cca20 esp: f589defc
[17180985.572000] ds: 007b es: 007b ss: 0068
[17180985.572000] Process acroread (pid: 7312, threadinfo=f589c000 task=f6530a70
)
[17180985.572000] Stack: 00000000 00000000 00000000 00000000 00000000 f58b18c0
00001c90 00000000
[17180985.572000] 00000000 f58b18c0 00000202 00000000 00000000 ffffffff
7fffffff 00000000
[17180985.572000] 00000000 f8b055e4 00000000 f5df5d40 00000000 00000000
00000010 f58b18c0
[17180985.572000] Call Trace:
[17180985.572000] [<c0160c84>] __fput+0x64/0x160
[17180985.572000] [<c015f34b>] filp_close+0x3b/0x80
[17180985.572000] [<c015f3f1>] sys_close+0x61/0xb0
[17180985.572000] [<c010304b>] sysenter_past_esp+0x54/0x79
[17180985.572000] Code: 1b 89 c3 8b 03 85 c0 75 f3 e8 de 61 17 00 83 c4 58 5b
5e 5f c3 8d b4 26 00 00 00 00 31 d2 8a 50 28 f6 c2 02 75 11 83 e2 20 75 15 <0f>
0b 8f 07 d6 32 30 c0 89 c3 eb cc 53 e8 2f db ff ff 58 eb b0
As far I read this bug should be resolved in 2.6.16
GS
P.S.: This does not occur on 2.6.16.4-citi2
--
NFSv4 Client do not work
https://launchpad.net/bugs/57543
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