Subject: deadlocks, many processes in sleepq_block
To: None <email@example.com>
From: Anthony Mallet <firstname.lastname@example.org>
Date: 09/20/2007 18:01:27
Since a few weeks (let's say since ~ august 20th), my -very-current with
option MULTIPROCESSOR freezes _very_ often.
I can trigger this problem in a few seconds under X11 with 1000baseT
network and nfs activity, but it takes some minutes under X11 with
100baseT network and nfs activity. The most strange is that I triggered
it once without option MULTIPROCESSOR (i.e. mono processor).
But it never happened in console mode.
The symptoms are the following:
- no network, no filesystem acces.
- kernel is still alive, processes that do no IO at all continue to work
(e.g. I can switch my virtual desktops under X).
- I can kill X (ctrl-alt-bkspace) and enter ddb.
A ps in ddb always shows the same three active processes:
firefox-bin & gkrellm & nfsd.
Every single process seems to be hung in sleepq_block() and the three
above were doing some nfs-related operations before ending up in
Is there something I should try/investigate in order to find the source
of the problem? Is it an already known problem?
Any help appreciated :)