Date: Mon, 17 Jul 2000 20:21:07 -0700 (PDT) From: Matthew Jacob <mjacob@feral.com> To: Andrew Gallatin <gallatin@cs.duke.edu>, Doug Rabson <dfr@nlsystems.com> Subject: Re: fxp0 hangs on a PC164 using STABLE
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I'm a little uneasy about this. It's likely to make the FXP unhappy, to say the least. If you *do* use this, put memory barriers in before and after the the flag update. Doug, Drew- I'm not sure whether LDL_L/STL_C and LDQ_L/STQ_C are cognizant of I/O device accesses to memory or not- my green book sayeth not. It's possible not. It'd be preferrable, IMO, to write 5 lines of inline assembly code that use the load_locked && store_locked_conditional rather than hit the FXP over the head. Anybody else know? Or should we go ask Chris/Jason/Ross (I'm sure Ross'd know)? -matt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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