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SubjectRe: complete IO hang since a few kernel revision
Mike Galbraith napsal(a):
> On Tue, 2009-10-06 at 16:16 +0900, Norbert Preining wrote:
>
>> On Tue, 06 Oct 2009, Mike Galbraith wrote:
>>
>>> I've tried unsuccessfully to reproduce this behavior.
>>>
>>> Since it doesn't appear to be something readily reproducible, more
>>> information and/or some digging on your part may be needed.
>>>
>> Hm, how could I do that? I am fine with compiling some strange
>> kernel options, or running some debugging task, but I don't have
>> and netconsole or serial console available.
>>
>
> Locating when it started for you would be valuable, even if it's not
> pin-pointed such as a git bisection could do. A bisection is the best
> bet to nail it down, but can be quite time consuming.
>
>
I see something similar here. Processes just get stuck in
balance_dirty_pages for infinite time. It helps if, when process is
stuck another process generates some dirty pages. Unfotunately last
kernel I'm prety sure everything worked is 2.6.31-rc9-tip-01355-ge035e96
(yes its x86 -tip kernel). I'm building new kernel now.

Petr

> One thing you can try is to drop to a non-gui shell, and see it the
> symptom is reproducible without the GUI. If it is, poke SysRq-W while
> things are thoroughly jammed up, and post the output+config here.
>
> -Mike
>
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