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(linux_command_line)-> White box crash after long uptime submited by Russell Wed 09 Nov 05
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I have white box linux installed on a computer in my office that we use as a file server. It was online w/o issues for 71 days. well w/o issues for about 69 days. the past few days it seem sluggish, then this afternoon, it crashed with a kernal error ( sync failed). I happend to have top running on a remote machine. here is what it looked like just before the crash:
top - 15:22:23 up 71 days,  6:47,  2 users,  load average: 5.97, 5.75, 6.39
Tasks:  99 total,   1 running,  98 sleeping,   0 stopped,   0 zombie
Cpu(s):  1.6% us,  1.6% sy,  0.0% ni,  0.0% id, 96.4% wa,  0.3% hi,  0.0% si
Mem:    157704k total,   156756k used,      948k free,      356k buffers
Swap:   327672k total,   205196k used,   122476k free,     6512k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
25594 russell   16   0  8752  296  188 S  1.0  0.2   0:41.71 sshd
26449 root      15   0 93136 4372  448 D  1.0  2.8   1:14.45 perl
25622 russell   17   0  3740  596  416 R  0.7  0.4   2:10.42 top
   30 root      15   0     0    0    0 S  0.3  0.0  70:18.49 kswapd0
    1 root      16   0  3436   68   48 S  0.0  0.0   0:31.82 init
    2 root      34  19     0    0    0 S  0.0  0.0   0:21.98 ksoftirqd/0
    3 root       5 -10     0    0    0 S  0.0  0.0   0:01.54 events/0
    4 root       5 -10     0    0    0 S  0.0  0.0   0:00.04 khelper
    5 root       5 -10     0    0    0 S  0.0  0.0   0:00.90 kblockd/0
    6 root      15   0     0    0    0 S  0.0  0.0   0:00.00 khubd
   31 root      10 -10     0    0    0 S  0.0  0.0   0:00.00 aio/0
   26 root      15   0     0    0    0 S  0.0  0.0   0:00.84 kapmd
  105 root      25   0     0    0    0 S  0.0  0.0   0:00.00 kseriod
  192 root       6 -10     0    0    0 S  0.0  0.0   0:00.00 kmirrord/0
  205 root      15   0     0    0    0 S  0.0  0.0   2:10.39 kjournald
 1056 root       6 -10  1824    0    0 S  0.0  0.0   0:00.03 udevd
 1228 root      15   0     0    0    0 S  0.0  0.0 161:13.20 md2_raid5
What is odd to me about this is that no process is doing much of anything , but the sysload is almost 6.

A normal top session, after the reboot looks like this:
top - 17:35:10 up 23 min,  1 user,  load average: 0.00, 0.00, 0.05
Tasks:  61 total,   1 running,  60 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.7% us,  0.7% sy,  0.0% ni, 98.4% id,  0.0% wa,  0.0% hi,  0.3% si
Mem:    157704k total,    72088k used,    85616k free,     9712k buffers
Swap:   327672k total,        0k used,   327672k free,    31456k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 2603 russell   16   0  7620 2224 1816 S  0.7  1.4   0:07.21 sshd
 2631 russell   17   0  3716  932  756 R  0.3  0.6   0:06.38 top
.....
Notice that more than half of the physical memory is free after a reboot. This gets me thinking that I may have a memory leak. but not just any memory leak, but a leak in kernel, unswappable memory. which would suffocate the machine as it tried to live with less and less avaible real memory. I don't have any hard evidence of this, but I want to keep an eye on this.


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