PUFFS after-unmount deadlock

[manu%netbsd.org@localhost (Emmanuel Dreyfus)]

I have the issue of processes stuck sleeping for uvn_fp2 after a PUFFS
ffilesystem crashed. No way to kill -9, and no way to remoune the
filesystem, since the mount point is busy.

Here is the process backtrace, in case someone has an idea on how to
make that sleep interruptible:

sleepq_block(0,0,c04e551f,c04fc5c8,c1afb4f4,d861935c,c1aeed80,c1aeed80,0
,c1196d40) at netbsd:sleepq_block+0x9b
mtsleep(c0a2a764,204,c04e551f,0,c1aeed80,c1af8288,d86193ec,c025a100,0,c0
18f70b) at netbsd:mtsleep+0x108
uvn_findpage(d861953c,0,0,c1afb4dc,0,0,2,d861953c,c1af8288,0) at
netbsd:uvn_findpage+0xdd  
uvn_findpages(c1afb4dc,20000,0,d8619580,d861953c,0,d861946c,d861952c,c1a
fb4dc,30000) at netbsd:uvn_findpages+0x78
genfs_getpages(d861968c,c0655004,d86195fc,c0455a43,c064a520,c030ff63,d86
195fc,c0482993,0,c1a779c0) at netbsd:genfs_getpages+0x5a8
puffs_vnop_getpages(d861968c,c1aeed80,d86196bc,c0249e31,0,0,c041171e,0,c
051b404,10) at netbsd:puffs_vnop_getpages+0x3b
VOP_GETPAGES(c1afb4dc,20000,0,d86196f0,d861978c,0,1,0,1802,c1aac7e0) at
netbsd:VOP_GETPAGES+0x7b
ubc_fault(d86198c0,d7f5e000,d8619820,1,0,1,2,c03f40d1,2,c051b404) at
netbsd:ubc_fault+0x203
uvm_fault_internal(c051b400,d7f5e000,1,0,6,c1b34d80,c1a2be00,c04559c5,c0
655004,0) at netbsd:uvm_fault_internal+0x5d1
trap() at netbsd:trap+0x8ba
--- trap (number 6) ---
copyout(c19b86a4,d7f5e000,bb920ffc,4,0,c1a77340,d8619a9c,c0381400,0,d7df
2000) at netbsd:copyout+0x33
uiomove(d7f5e000,4,d8619c40,d8619af0,0,101,d8619adc,c045239d,d7f5e000,10
0) at netbsd:uiomove+0xb9
ubc_uiomove(c1afb4dc,d8619c40,10000,0,101,0,d8619b6c,c0243cfd,0,0) at
netbsd:ubc_uiomove+0x111
puffs_vnop_read(d8619ba0,1,d8619b9c,fffffffe,8,c03a46bf,0,c04559c5,c14ab
240,c1ab3280) at netbsd:puffs_vnop_read+0x248
VOP_READ(c1afb4dc,d8619c40,0,c1a88e40,c14ab244,0,c1ab3280,10000,6,1) at
netbsd:VOP_READ+0x58
vn_read(c1afad40,c1afad40,d8619c40,c1a88e40,1,1,0,c0249e31,0,0) at
netbsd:vn_read+0x93
dofileread(0,c1afad40,bb911000,10000,c1afad40,1,d8619d1c,0,0,0) at
netbsd:dofileread+0x77
sys_read(c1aac7e0,d8619cf4,d8619d1c,207,c04559c5,c12fa168,c04f2080,d8619
d40,3,c1aa66bc) at netbsd:sys_read+0x6f
syscall(d8619d48,bbbb00b3,ab,bfbf001f,bbbb001f,0,bb911000,bfbfe6c8,0,100
00) at netbsd:syscall+0x8f




-- 
Emmanuel Dreyfus
http://hcpnet.free.fr/pubz
manu%netbsd.org@localhost