Re: Race in MSCP (ra/rx) driver

[David Holland <dholland%netbsd.org@localhost>]

On Sat, Aug 29, 2020 at 08:51:19PM -0400, Mouse wrote:
 > (It also appears to be useful as a stress test for some aspect of
 > NetBSD I haven't yet tracked down.  In at least some of my test
 > runs, it seems to drive the underlying system into a peculiar state
 > where userland is *really* slow, but the kernel is still ticking
 > over just fine.  It feels almost as though the scheduling quantum
 > gets changed to something like a minute.  But it's hard to debug,
 > because it happens - when it happens - only after many hours of
 > emulator run.)

Have a look for signed overflows in the timing code (yours and
netbsd's)...

-- 
David A. Holland
dholland%netbsd.org@localhost