Re: pdflush in D state

From: Andrew Morton (akpm@digeo.com)
Date: Thu Feb 06 2003 - 02:41:39 EST


Patrick Mau <mau@oscar.ping.de> wrote:
>
> This goes extremly fast, but after a few seconds pdflush
> gets stuck in D state and tries to write back dirty pages.
> The machine is completly unresponsive and "top" reports
> 75 percent IO wait time. The actual build has not even started.
>

At a guess, I'd say that a disk device driver has dropped an interrupt and
I/O completion has not happened.

Check your kernel log and dmesg output for anything untoward, and then try
invoking sysrq-P and sysrq-T to find out where everythihg is stuck.

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