Messages in this thread | | | Date | Sun, 4 Sep 2011 21:17:02 -0400 (EDT) | From | Alan Stern <> | Subject | Re: [BUG] D state process after unplug and umount usb disk |
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On Sun, 4 Sep 2011, Lin Ming wrote:
> On Sun, Sep 4, 2011 at 9:49 PM, Alan Stern <stern@rowland.harvard.edu> 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?
With the USBDEVFS_DISCSIGNAL ioctl.
> I have not checked, but think umount code path will not send signal to process.
I don't think so either.
Alan Stern
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