Date: Sun, 10 Feb 2002 11:30:10 +1100 (EST) From: Bruce Evans <bde@zeta.org.au> To: Julian Elischer <julian@elischer.org> Cc: <bde@freebsd.org>, FreeBSD current users <current@freebsd.org> Subject: Re: "fast" interrupt handler threads. Message-ID: <20020212021234.A63CC9F383@okeeffe.bestweb.net>
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On Sat, 9 Feb 2002, Julian Elischer wrote: > On Sun, 10 Feb 2002, Bruce Evans wrote: > > > > Yes, anything that reaches doreti checks for ASTs and runs userret() if > > necessary and possible (only for returns to user mode). > > > > Hmm, this check seems to be inadequate for fast interrupts. There is > > no check for rescheduling if the return is to kernel mode. > > Do you plan on fixing anything you find wrong here? Sure. I think this is only a minor problem. Most processes don't stay in the kernel for long, and things scheduled in fast interrupt handlers aren't very time-critical (but softclock should run before the next hardclock!). Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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