Re: [BUG] D state process after unplug and umount usb disk

[Dave Young]

On Sun, Sep 4, 2011 at 10:25 PM, Lin Ming <mlin@xxxxxxxxxxxxx> wrote:
> On Sun, Sep 4, 2011 at 9:49 PM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote:
>>
>>> Where does this exit signal come from?
>>> Does USB interrupt handler will send kill signal to all processes
>>> accessing it when it's unplugged(by hand)?
>>
>> The USB stack does not send any signals at all unless a process
>> specifically asks for them.
>
> How to ask?
>
> I have not checked, but think umount code path will not send signal to process.
> Curiously, where does the exit signal come from?
>
> Dave,
> Did you press "Ctrl + C" on cat?

Yes and no. I press ctrl+C after it hang as D state

>
> Lin Ming
>



-- 
Regards
Yang RuiRui
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