vmstat 'b' (disk busy?) field keeps climbing ...

[Marc G. Fournier]

'k, this has gotta be a leak somewhere ... I'm now up to 6 blocked:

  0 8 0 7449224 236552  213   2   1   0 109   0 101   0  475 2890 2143  2  6 92
  0 6 0 7481104 247704  578   0   0   0 1196   0 262   0  808 8901 3049  5 16 79
  0 6 0 7450820 253576 1385   3   2   3 1379   0  13   0  303 4742 1703 13 13 73
  0 6 0 7478168 248372  295   0   0   0 160   0  57   0  428 1900 2616  2  7 92
  0 6 0 7473064 249072    1   0   0   0  23   0   6   0  273  822 845  1  2 97
  1 6 0 7479000 243164  275  17   7   0 144   0  17   0  317 1572 2180  2  6 92

But there don't appear to be any processes reporting itself as being blocked:

pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
     0 30418 30416   6   8  0  4916  2624 ppwait Ds    pa    0:00.13 -csh (csh)
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
     0 30418 30416 137   8  0  4916  2624 ppwait Ds    pa    0:00.14 -csh (csh)
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'
pluto# ps axlww | awk '$10 ~ /^D[^L]/'

Or is there something else I should be looking at/for?

In the case of this system, its kernel sources from ~May 25th ...

On Sat, 24 Jun 2006, Marc G. Fournier wrote:

> On Sat, 24 Jun 2006, Kostik Belousov wrote:
>
>> 2. 2 Giant holders/lockers. Is it constant ? Are the processes 
>> holding/waiting
>> for Giant are the same ?
>
> Mostly appears to be 'clock' ...
>
> pluto# ps axlww | grep Giant | grep -v grep
>    0    12     0   0 -32  0     0     8 Giant  LL    ??    3:07.03 [swi4: 
> clock]
> pluto# ps axlww | grep Giant | grep -v grep
>    0    12     0   0 -32  0     0     8 Giant  LL    ??    3:07.03 [swi4: 
> clock]
> pluto# ps axlww | grep Giant | grep -v grep
>    0    12     0   0 -32  0     0     8 Giant  LL    ??    3:07.03 [swi4: 
> clock]
> pluto# ps axlww | grep Giant | grep -v grep
> pluto# ps axlww | grep Giant | grep -v grep
>    0    12     0   0 -32  0     0     8 Giant  LL    ??    3:07.03 [swi4: 
> clock]
> pluto# ps axlww | grep Giant | grep -v grep
> pluto# ps axlww | grep Giant | grep -v grep
>    0    12     0   0 -32  0     0     8 Giant  LL    ??    3:07.03 [swi4: 
> clock]
> pluto# ps axlww | grep Giant | grep -v grep
> pluto# ps axlww | grep Giant | grep -v grep
>    0 92517 46540 114 110  0  5032  2412 Giant  LV+   p4    0:00.00 -csh 
> (csh)
> pluto# ps axlww | grep Giant | grep -v grep
>    0    12     0   0 -32  0     0     8 Giant  LL    ??    3:07.04 [swi4: 
> clock]
> 1001 14098     1   0  96  0  3308  1324 Giant  LsJ   ??    0:04.98 
> /usr/local/libexec/postfix/master
> pluto# ps axlww | grep Giant | grep -v grep
> pluto# ps axlww | grep Giant | grep -v grep
>    0    12     0   0 -32  0     0     8 Giant  LL    ??    3:07.04 [swi4: 
> clock]
> pluto# ps axlww | grep Giant | grep -v grep
> pluto#
>
> And I suspect that the master is disk i/o, since the iir driver is listed as 
> still GIANT-LOCKED:
>
> iir0: <Intel Integrated RAID Controller> mem 0xfc8f0000-0xfc8f3fff irq 30 at 
> device 9.0 on pci1
> iir0: [GIANT-LOCKED]
>
>> Ah, and does dmesg show anything ?
>
> Anything (other then the iir driver) that I'd be looking for in there?  Or 
> could that be what is compounding the problem?  Too many things trying to 
> acquire GIANT over the drive(s), creating a deadlock?  Long shot there ... ?
>
> ----
> Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
> Email . scrappy at hub.org                              MSN . scrappy at hub.org
> Yahoo . yscrappy               Skype: hub.org        ICQ . 7615664
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----
Marc G. Fournier           Hub.Org Networking Services (http://www.hub.org)
Email . scrappy at hub.org                              MSN . scrappy at hub.org
Yahoo . yscrappy               Skype: hub.org        ICQ . 7615664