On Thu, Feb 13, 2003 at 05:32:21PM +0100, Ren� Seindal wrote: > With such a system there is really no way of dragging a recalcitrant > process out of kernel mode. If it is stuck in there, it is stuck. > Signals are registered, but not delivered, because the transition to > user-space never happens.
well, what if a workaround were put into the driver for the removable
devices that were causing this problem in the first place? that is,
if this were from a removable block device, and it were removed[1], and it
has a read request queued, have the driver's request handler return an
error of some kind[2]. then the process would wake up from the read,
and recieve the queued signals.
sean
[1] and the removal could be discovered by querying the device by an
interruptible_sleep_on() for the device read request, or via a userland
sysctl.
[2] granted, i'm not a kernel expert, but i've done a fair share of
hacking on it, so i wonder if this would be possible.
msg30589/pgp00000.pgp
Description: PGP signature
