WAPBL kernel assertion

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

Hello,
on a NetBSD 5.1 Xen domU, I got:
panic: kernel diagnostic assertion "wl->wl_dealloccnt < wl->wl_dealloclim" 
failed: file "/home/builds/ab/netbsd-5/src/sys/kern/vfs_wapbl.c", line 1673
fatal breakpoint trap in supervisor mode
trap type 1 code 0 eip c03991dc cs 9 eflags 246 cr2 ca840000 ilevel 0
Stopped in pid 455.14 (mysqld) at       netbsd:breakpoint+0x4:  popl    %ebp
db> tr
breakpoint(c044a8af,cb87a638,c045ffc0,9d0,cba5a000,dd7c,6eee78,0,c1067e20,ee70006e)
 at netbsd:breakpoint+0x4
panic(c0454a80,c0419709,c0445818,c04457c4,689,9d,cb87a67c,c0351287,c0419709,c04457c4)
 at netbsd:panic+0x1a6
__kernassert(c0419709,c04457c4,689,c0445818,c0f95000,0,0,6eee78,0,0) at 
netbsd:__kernassert+0x39
wapbl_register_deallocation(c0f79b00,dddcf4,0,1800,c0233680,1,cb87a7b4,c035a284,cb4d8ac8,1)
 at netbsd:wapbl_register_deallocation+0x87
ffs_realloccg(cb4d7170,0,0,92d60,0,400,800,cb5add7c,cb87aadc,cb87a8e4) at 
netbsd:ffs_realloccg+0x7e9
ffs_balloc_ufs1(200,cb5add7c,3,cb87aadc,cba11508,cb87a9e4,cb87a95c,c027856a,0,0)
 at netbsd:ffs_balloc_ufs1+0x15a8
ffs_balloc(cb4d8ac8,400,0,200,cb5add7c,3,cb87aadc,0,2c00,2000) at 
netbsd:ffs_balloc+0x75
ufs_direnter(cb4d8ac8,cba11508,cb301e70,cb87ac90,0,cb4d7170,cba11508,c034ef91,ca1eab6c,0)
 at netbsd:ufs_direnter+0x9f
ufs_makeinode(81b0,cb4d8ac8,cb87ac7c,cb87ac90,cb87ac28,2,cb87abdc,cb87abc0,cb87ac7c,0)
 at netbsd:ufs_makeinode+0x406
ufs_create(cb87ab80,cb4d8af0,cb87abac,c03476ec,cb87ac1c,cb87ab9f,0,c040ca20,cb4d8ac8,cb87ac7c)
 at netbsd:ufs_create+0x5a
VOP_CREATE(cb4d8ac8,cb87ac7c,cb87ac90,cb87abc0,cb4d8ac8,200,cb5add7c,1,1b0,ffffffff)
 at netbsd:VOP_CREATE+0x33
vn_open(cb87ac68,f03,1b0,c034ae19,b85fc160,cb50c3b4,0,cb87accc,cb87ac9c,b85fd824)
 at netbsd:vn_open+0x25d
sys_open(cb834520,cb87ad00,cb87ad28,c03ad187,c03ad187,4bfb000,0,b85fd824,f02,1b0)
 at netbsd:sys_open+0xc0
syscall(cb87ad48,1f,1f,b85f001f,b85f001f,b85fd824,b8400000,b85fc75c,bbbe7170,f02)
 at netbsd:syscall+0xc7

file system is clean (I forced a fsck). For now I'm running without wapbl.
Does this ring a bell to someone ?

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--