Re: Disk/FS I/O issues in -CURRENT

From: Peter Holm <peter_at_holm.cc>
Date: Mon, 30 Jun 2003 14:55:53 +0200
On Mon, Jun 30, 2003 at 01:42:15PM +0200, Eirik Oeverby wrote:
> Hi folks,
> 
> I am having some very weird problems on my laptop,

I can repeat the problem (noticed with savecore) on a
kernel from Jun 30 05:23 UTC:

current# df -h .
Filesystem    Size   Used  Avail Capacity  Mounted on
/dev/ad0s1f   8.2G   1.9G   5.6G    25%    /usr
current# dd if=/dev/zero of=100mb bs=1024 count=102400
load: 4.04  cmd: dd 25063 [running] 0.33u 28.67s 4% 100k
97657+0 records in
97657+0 records out
100000768 bytes transferred in 48.549837 secs (2059755 bytes/sec)

db> ps
  pid   proc     addr    uid  ppid  pgrp  flag   stat  wmesg    wchan  cmd
25063 c1e5d3c8 cd19d000    0 25060 25063 0004002 [RUNQ] dd
    8 c197ed3c ccc9e000    0     0     0 0000204 [CPU 0] pagedaemon

db> t 8
siointr1(c0b6c800,0,c051fcc5,693,c867abf0) at siointr1+0xd5
siointr(c0b6c800) at siointr+0x35
Xfastintr4() at Xfastintr4+0x63
--- interrupt, eip = 0xc0377480, esp = 0xc867abdc, ebp = 0xc867abf0 ---
strncmp(c051e785,c051df68,123,0,477b) at strncmp
witness_unlock(c059c280,8,c051e785,35c,1) at witness_unlock+0x5a
_mtx_unlock_flags(c059c280,0,c051e785,35c,c0ba69ec) at _mtx_unlock_flags+0x80
vm_pageout_scan(0,0,c051e785,5dd,1f4) at vm_pageout_scan+0x40c
vm_pageout(0,c867ad48,c0505bfc,312,0) at vm_pageout+0x2ce
fork_exit(c04688d0,0,c867ad48) at fork_exit+0xc0
fork_trampoline() at fork_trampoline+0x1a
--- trap 0x1, eip = 0, esp = 0xc867ad7c, ebp = 0 ---
db> 
Received on Mon Jun 30 2003 - 03:56:11 UTC

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