On Mon, Aug 25, 2003 at 18:29:49 -0600, Kenneth D. Merry wrote: > On Mon, Aug 25, 2003 at 13:49:30 -0700, Nate Lawson wrote: > > Ken is aware of the following problem. It is in both cd(4) and da(4) as > > well as stable and current. One possible approach would be to run > > {da,cd}register() from a task queue and not at interrupt time. > > That would be tricky, since the peripheral registration process currently > expects a success/failure return from the peripheral constructor. > > Just putting the sysctl creation in a task queue, though, would not be too > difficult. > > One question I have, though, is whether task queues run in a thread context > or not. If not, then we'll have the same problem. The answer is -- the currently defined task queues use software interrupts. If it is possible to create a task queue that uses a kernel thread instead, that might be a generally useful thing. (And it might solve this particular issue.) Ken -- Kenneth Merry ken_at_kdm.orgReceived on Mon Aug 25 2003 - 20:36:47 UTC
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