kernel BUG at lib/radix-tree.c:372! on a vmware node

Binary package hint: linux-image-2.6-686

Situation: all virtual vmware machines are on a nfs mounted filesystem. One vmware machine goes unuseable and comsume all the CPU time. A kill -KIL pid doesn't wipe out the vmware process. A ls -lh on the nfs mount hangs.

I'm using Dapper Drake, details:
2.6.15-26-686 #1 SMP PREEMPT Thu Aug 3 03:13:28 UTC 2006 i686 GNU/Linux
dpkg -l nfs-common
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==============-==============-============================================
ii nfs-common 1.0.7-3ubuntu2 NFS support files common to client and serve

I found in the /var/log/kern.log the following sequenze:

kernel: [17758077.728000] ------------[ cut here ]------------
kernel: [17758077.728000] kernel BUG at lib/radix-tree.c:372!
kernel: [17758077.728000] invalid operand: 0000 [#1]
kernel: [17758077.728000] PREEMPT SMP
kernel: [17758077.728000] Modules linked in: vmnet parport_pc vmmon nfs lockd sunrpc ipv6 md_mod dm_mod lp parport ide_disk tsdev serio_raw psmouse i2c_piix4 i2c_core floppy cfi_probe gen_probe pcspkr scb2_flash mtdcore chipreg tg3 sworks_agp agpgart map_funcs evdev ext3 jbd ide_generic ohci_hcd usbcore ide_cd cdrom serverworks generic cciss scsi_mod thermal processor fan capability commoncap vga16fb vgastate fbcon tileblit font bitblit softcursor
kernel: [17758077.728000] CPU: 0
kernel: [17758077.728000] EIP: 0060:[radix_tree_tag_set+147/160] Tainted: P VLI
kernel: [17758077.728000] EFLAGS: 00013046 (2.6.15-26-686)
kernel: [17758077.728000] EIP is at radix_tree_tag_set+0x93/0xa0
kernel: [17758077.728000] eax: 00000000 ebx: 00000000 ecx: f5ba81a0 edx: 00000006
kernel: [17758077.728000] esi: 00000000 edi: 00000004 ebp: 00000003 esp: ee27fd10
kernel: [17758077.728000] ds: 007b es: 007b ss: 0068
kernel: [17758077.728000] Process vmware-vmx (pid: 25602, threadinfo=ee27e000 task=ed392a90)
kernel: [17758077.728000] Stack: 00000008 c2a5da84 ef6ac730 00000000 ef6ac740 c015766c ef6ac734 00005b86
kernel: [17758077.728000] 00000001 00003202 e2e90c54 e2e90c60 ef5e84c0 ee27fd90 f8cf835d c2a5da84
kernel: [17758077.728000] 00000050 f8cf726d ef6ac630 f78e6410 00000000 e2e90b00 00000000 ef5e84c0
kernel: [17758077.728000] Call Trace:
kernel: [17758077.728000] [test_set_page_writeback+284/320] test_set_page_writeback+0x11c/0x140
kernel: [17758077.728000] [pg0+948556637/1069167616] nfs_flush_one+0xdd/0x190 [nfs]
kernel: [17758077.728000] [pg0+948552301/1069167616] nfs_find_request+0x3d/0x50 [nfs]
kernel: [17758077.728000] [pg0+948556909/1069167616] nfs_flush_list+0x5d/0xc0 [nfs]
kernel: [17758077.728000] [pg0+948559695/1069167616] nfs_flush_inode+0x8f/0xd0 [nfs]
kernel: [17758077.728000] [pg0+948551700/1069167616] nfs_writepages+0xb4/0x140 [nfs]
kernel: [17758077.728000] [__filemap_fdatawrite_range+107/128] __filemap_fdatawrite_range+0x6b/0x80
kernel: [17758077.728000] [filemap_fdatawrite+48/64] filemap_fdatawrite+0x30/0x40
kernel: [17758077.728000] [pg0+948518038/1069167616] nfs_sync_mapping+0x46/0x90 [nfs]
kernel: [17758077.728000] [pg0+948522552/1069167616] nfs_revalidate_mapping+0xa8/0xe0 [nfs]
kernel: [17758077.728000] [__up+28/32] __up+0x1c/0x20
kernel: [17758077.728000] [pg0+948511850/1069167616] nfs_file_write+0x9a/0x130 [nfs]
kernel: [17758077.728000] [do_sync_write+201/304] do_sync_write+0xc9/0x130
kernel: [17758077.728000] [update_atime+138/160] update_atime+0x8a/0xa0
kernel: [17758077.728000] [autoremove_wake_function+0/96] autoremove_wake_function+0x0/0x60
kernel: [17758077.728000] [vfs_write+214/432] vfs_write+0xd6/0x1b0
kernel: [17758077.728000] [sys_pwrite64+128/144] sys_pwrite64+0x80/0x90
kernel: [17758077.728000] [sysenter_past_esp+84/117] sysenter_past_esp+0x54/0x75
kernel: [17758077.728000] Code: 24 d3 ea 83 e2 3f 8d 8c 03 04 01 00 00 0f a3 11 19 c0 85 c0 75 03 0f ab 11 8b 5c 93 04 85 db 74 0a 45 83 ee 06 39 ef 75 cf eb a3 <0f> 0b 74 01 d4 a7 32 c0 eb ec 8d 76 00 55 57 56 53 83 ec 40 8b
kernel: [17758077.728000] <4>rtc: lost some interrupts at 2048Hz.
kernel: [17758078.152000] note: vmware-vmx[25602] exited with preempt_count 1

A Google search (kernel BUG at lib/radix-tree.c:372) show a problem with NFS file truncation race condition in combination with 2.6.15