Date: Thu, 8 Feb 2001 18:58:11 -0800 From: Mark Peek <mark@whistle.com> To: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> Cc: net@FreeBSD.ORG, Luigi Rizzo <rizzo@aciri.org> Subject: Re: potential infinite loop in network device drivers Message-ID: <p05010400b6a90c84c551@[207.76.207.169]> In-Reply-To: <200102090209.VAA60712@khavrinen.lcs.mit.edu> References: <200102090102.f19125x06386@iguana.aciri.org> <200102090209.VAA60712@khavrinen.lcs.mit.edu>
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At 9:09 PM -0500 2/8/01, Garrett Wollman wrote: >One possible right way to deal with this is to get rid of the >two-level interrupt scheme (for fast interfaces at least) and push the >packets all the way through the network stack. This will ensure that >if packets are arriving faster than we can handle them, they will be >dropped by the network interface with an ``insufficient resources'' >error. > >Another possible right way to deal with this is to move all network >processing into the lower level, and poll round-robin for packets >(with network interrupts disabled) until all network interfaces are >finished (or we need to give the user a time slice). > >Both techniques were described in a paper by Jeff Mogul (then at DEC >in Palo Alto) about five years ago; I have a physical copy of the >paper buried somewhere in my office. Is this the paper you were referring to? <http://www.research.compaq.com/wrl/techreports/abstracts/95.8.html>; Mark --------- Mark Peek Director of Internet Technology IBM Global Small Business/Whistle Communications Work: (650) 577-7052 Email: mark@whistle.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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