Well, did some sysrq show tasks while blanking and found processes
locked (D) in:
sleep_on()
wait_on_buffer()
lock_page()
___wait_on_page()
I issued a ^C to cdrecord but blanking kept on. System resumed normal
operation after end of blanking.
BTW I'm using ReiserFS .
Álvaro
On Qui, 2001-11-29 at 15:17, Alvaro Lopes wrote:
> Hi all
>
> This is very weird. A few days ago I started blanking a CD-RW with a
> HP9500 IDE drive and after five seconds or so the system froze. I was
> still able to ping it and SNAT worked properly too. All services (X,
> ssh, smtp) stopped and were almost fully inacessible (I was still able
> to see some applets working on X, but no more) and when it finished
> blanking, system came back to normal as if nothing had happended.
>
> At the time I thought it might be a 2.4.14 issue.
>
> Today I repeated the test with 2.4.16 w/ preemption patch. The same
> thing happened. This time I was running a 'vmstat 1':
>
> ....
> ....
> ....
> 0 4 1 50524 3932 2984 46168 0 0 0 0 102 151 0 0 100
> 0 4 1 50524 3932 2984 46168 0 0 0 0 102 154 0 0 100
> 0 4 1 50524 3928 2984 46168 0 0 0 0 101 149 0 0 100
> 0 4 1 50524 3928 2984 46168 0 0 0 0 101 154 0 0 100
> 1 4 1 50524 3928 2984 46168 0 0 0 0 101 150 0 0 100
> 0 4 1 50524 3928 2984 46168 0 0 0 0 102 151 0 0 100
> 0 4 1 50524 3924 2984 46168 0 0 0 0 101 156 0 0 100
> 0 4 1 50524 3924 2984 46168 0 0 0 0 101 152 0 0 100
> 0 4 1 50524 3924 2984 46168 0 0 0 0 102 155 0 0 100
> 0 4 1 50524 3924 2984 46168 0 0 0 0 101 150 0 0 100
> 0 4 1 50524 3916 2984 46168 0 0 0 0 101 150 0 0 100
> 0 4 1 50524 3916 2984 46168 0 0 0 0 101 151 0 0 100
>
> when it got here, system froze.... and then:
>
> 1 5 1 50584 4216 2820 44996 2348 296 3032 348 113506 165193 0 0 100
> 1 4 1 50572 11416 3192 37112 348 0 668 596 319 1243 4 3 93
> 1 1 0 50552 11468 3520 37420 0 0 308 492 315 794 6 3 91
> 1 0 0 50552 11068 3544 37596 0 0 168 4 127 9301 65 6 29
> 1 0 0 50552 11064 3544 37596 0 0 0 0 104 652 75 0 25
> 2 0 0 50552 11064 3544 37596 0 0 0 0 102 604 75 0 25
> 1 0 procs memory swap io system
> cpu
> r b w swpd free buff cache si so bi bo in cs us sy id
> 1 0 1 50552 10992 3616 37596 0 0 0 140 154 721 75 1 25
> 2 0 0 50552 10992 3616 37596 0 0 0 32 118 679 75 0 25
> 1 0 0 50552 10988 3616 37596 0 0 0 0 101 610 75 0 25
> 1 0 0 50552 10988 3616 37596 0 0 0 0 102 602 74 0 26
> 0 0 0 50552 10104 3652 37664 220 0 308 0 139 741 47 1 52
> 0 0 0 50552 10104 3652 37664 0 0 0 0 107 491 0 0 100
> 0 0 0 50552 10012 3744 37664 0 0 0 160 155 598 1 0 99
> 0 0 0 50552 10320 3744 37704 32 0 84 0 181 1078 18 2 80
> 0 0 0 50552 10284 3780 37704 0 0 0 44 250 834 1 2 97
>
>
> What is happening here ? Any clues ???
>
> Álvaro Lopes
>
>
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This archive was generated by hypermail 2b29 : Fri Nov 30 2001 - 21:00:35 EST