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issue with domU and mySQL



Hi,

I'm facing recurrent issue with MySQL inside a domU.
Look's like it is not really only MySQL, but the environment in which
mysql runs. My VM dies each time I'm trying to have intensive i/o to the
db (from another domU using php-mysql).

When the VM freezes, I log onto the console, using "xm console domuID"
are here's what I get:
########################################################################
Starting inetd.
Starting cron.
Fri May 12 00:37:17 CEST 2006

NetBSD/i386 (akela.tumfatig.net) (console)

login: panic: kernel debugging assertion "(vp->v_flag & VONWORKLST)" failed: 
file "../../../../miscfs/genfs/genfs_vnops.c", line 1322
Stopped in pid 490.3 (mysqld) at        netbsd:cpu_Debugger+0x4:        popl    
%
ebp
cpu_Debugger(0,c0697480,0,cb1dfcc8,c032a019) at netbsd:cpu_Debugger+0x4
panic(c037d643,c035c270,c036ec19,c036ea98,52a) at netbsd:panic+0xa9
__assert(c035c270,c036ea98,52a,c036ec19,c0819100) at netbsd:__assert+0x19
genfs_putpages(cb1dfe3c,c0342360,cb228748,0,0) at netbsd:genfs_putpages+0x961
VOP_PUTPAGES(cb228748,0,0,0,0) at netbsd:VOP_PUTPAGES+0x40
nfs_flush(cb228748,ca0c00fc,1,cb1424d0,0) at netbsd:nfs_flush+0x1d
nfs_close(cb1dfeb4,c03418a0,cb228748,3,ca0c00fc) at netbsd:nfs_close+0x54
VOP_CLOSE(cb228748,3,ca0c00fc,cb1424d0,cb228748) at netbsd:VOP_CLOSE+0x34
vn_close(cb228748,3,ca0c00fc,cb1424d0,cb1dff50) at netbsd:vn_close+0x2b
vn_closefile(cb2c0894,cb1424d0,0,0,0) at netbsd:vn_closefile+0x17
closef(cb2c0894,cb1424d0,cb1dff68,c0383908,0) at netbsd:closef+0x15a
syscall_plain() at netbsd:syscall_plain+0xc2
--- syscall (number 6) ---
0xbd91c1b7:
ds          0x11
es          0x11
fs          0x31
gs          0x11
edi         0xc037d643  copyright+0x311a3
esi         0x100
ebp         0xcb1dfc98
ebx         0xcb1dfcb8
edx         0xc0467000  emul_freebsd_object+0x92f6c
ecx         0xfffffffe
eax         0xb3e
eip         0xc02ed1cb  cpu_Debugger+0x4
cs          0x9
eflags      0x202
esp         0xcb1dfc98
ss          0x11
netbsd:cpu_Debugger+0x4:        popl    %ebp
Stopped in pid 490.3 (mysqld) at        netbsd:cpu_Debugger+0x4:        popl    
%
ebp
db>
########################################################################

Does anyone see what's not correct in my VM ?
Memory seems to be enough (according to my rrdtool graph):
the VM is using ~124Mo over the 192Mo is has, and no data in swap file.

If it matters, dom0 has 192Mo available, fully (190Mo average) used but
none of the swap file is used.

any idea ?
TIA,
        Jo

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