RE: PROBLEM: Oops when doing disk heavy disk I/O

On Wed, 2006-10-25 at 10:21 +1000, Michael wrote:

-----Original Message-----
From: Sergio Monteiro Basto [mailto:sergio@xxxxxxxxxxxxxxxxxx]
Sent: Wednesday, 25 October 2006 3:27 AM

Hi,
please boot with "report_lost_ticks" like
http://marc.theaimsgroup.com/?l=linux-kernel&m=115545986619977&w=2
and see if you have
time.c: Lost n timer tick(s)!

and
cat /sys/devices/system/clocksource/clocksource0/

cat /sys/devices/system/clocksource/clocksource0/current_clocksource



Hi,

Yep, seems to be losing some ticks -- I'm not sure what that means, but is
it bad? :-)


well I don't know for sure , but after this initials Lost Timer tick ,
it appears more after a few time of uptime ?


[ root @ barbossa : ~ ] # dmesg | grep tick
Command line: root=/dev/md1 ro report_lost_ticks
Kernel command line: root=/dev/md1 ro report_lost_ticks
time.c: Lost 1 timer tick(s)! rip release_console_sem+0x196/0x20c)
time.c: Lost 12 timer tick(s)! rip setup_boot_APIC_clock+0x11f/0x121)
time.c: Lost 2 timer tick(s)! rip __do_softirq+0x4a/0xc4)



Also, for the clocksource:
[ root @ barbossa : ~ ] # cat
/sys/devices/system/clocksource/clocksource0/available_clocksource
jiffies

[ root @ barbossa : ~ ] # cat
/sys/devices/system/clocksource/clocksource0/current_clocksource
jiffies


Thanks for your help.

Cheers,
Michael


--
Sérgio M.B.

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