Re: locking in a device driver
From: Dinesh Nair (dinesh_at_alphaque.com)
Date: 10/28/05
- Previous message: M. Warner Losh: "Re: FreeBSD 5/6/7 kernel emulator for NetBSD 2.x"
- In reply to: Scott Long: "Re: locking in a device driver"
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Date: Fri, 28 Oct 2005 21:58:42 +0800 To: Scott Long <scottl@samsco.org>
On 10/27/05 22:00 Scott Long said the following:
> If you need to protect your pseudodriver from being interrupted by the
> real driver then you'll need to use the same spl() as the driver. Note
> that you shouldn't be using splhigh() unless you really know what you
the driver currently is set to use INTR_TYPE_MISC, which from my
understanding can only be masked with splhigh(). using another INTR_TYPE
may be possible, so this is something i can explore.
however, the device interrupts at a constant 1000Hz, as it's a quad-span
E1/T1 line card, and thus it needs to have that interrupt serviced pronto
to avoid E1/T1 frame slips. any advice here ?
-- Regards, /\_/\ "All dogs go to heaven." dinesh@alphaque.com (0 0) http://www.alphaque.com/ +==========================----oOO--(_)--OOo----==========================+ | for a in past present future; do | | for b in clients employers associates relatives neighbours pets; do | | echo "The opinions here in no way reflect the opinions of my $a $b." | | done; done | +=========================================================================+ _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"
- Previous message: M. Warner Losh: "Re: FreeBSD 5/6/7 kernel emulator for NetBSD 2.x"
- In reply to: Scott Long: "Re: locking in a device driver"
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