Messages in this thread | | | Date | Mon, 7 Jan 2008 12:19:30 +0100 | From | Ingo Molnar <> | Subject | Re: regression: 100% io-wait with 2.6.24-rcX |
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* Joerg Platte <lists@naasa.net> wrote:
> Hi, > > when booting kernel 2.6.24-rc{4,5,6,7} top reports up to 100% iowait, > even if no program accesses the disc on my Thinkpad T40p. Kernel > 2.6.23.12 does not suffer from this. Is there anything I can do to > find out which process or which part of the kernel is responsible for > this? I can try to bisect it, but maybe there are other possibilities > to debug this, since I cannot boot this computer frequently. I > discovered, that there is no iowait within the first few seconds after > waking up from suspend to ram...
do:
echo t > /proc/sysrq-trigger
and send us the dmesg output. If the dmesg output does not include the bootup bits then increase CONFIG_LOG_BUF_SHIFT to 20 or so:
CONFIG_LOG_BUF_SHIFT=20
to have a large enough kernel messages buffer.
Ingo
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