into user mode? If not then there shouldn't be
any problem. The routines I was talking about earlier hold the USB device
locks while running in kernel mode, but they release them before returning
to user mode.
Alan Stern
().
If they don't enter get_signal_to_deliver(), they can only be frozen where
they explicitly call try_to_freeze().
What about the user threads?
Alan Stern
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On Fri, 1 Dec 2006, Rafael J. Wysocki wrote:
On Friday, 1 December 2006 15:56, Alan Stern wrote:
On Thu, 30 Nov 2006, Rafael J. Wysocki wrote:
Here's what I mean. usb-storage's kernel thread is unfreezable, because
it might be needed for reading or writing a memory image to a swap
work cut out trying to find all the places in
the kernel where an unfreezable process takes a lock which might be held
by a user process. For instance, I doubt that all the workqueue threads
could pass this test.
Alan Stern
-- the only safe approach is to fix the computer and restart it.
Alan Stern
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