Date: Fri, 4 Dec 1998 12:37:13 -0800 (PST) From: Julian Elischer <julian@whistle.com> To: Archie Cobbs <archie@whistle.com> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Help with clist_alloc_cblocks() Message-ID: <Pine.BSF.3.95.981204123650.2966H-100000@current1.whistle.com> In-Reply-To: <199812042028.MAA06497@bubba.whistle.com>
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UTSL? (helpful aren't I?) On Fri, 4 Dec 1998, Archie Cobbs wrote: > Hello, > I'm trying to write a line discipline, roughly similar to the PPP > line discipline. My question is, what are the correct parameters to > give to clist_alloc_cblocks()? > > /* > * Pre-allocate cblocks to the an appropriate amount. > */ > > ttyflush(tp, FREAD | FWRITE); > clist_alloc_cblocks(&tp->t_canq, 0, 0); > clist_alloc_cblocks(&tp->t_rawq, 0, 0); /* XXX probably wrong! */ > clist_alloc_cblocks(&tp->t_outq, MLEN + NGT_HIWATER, MLEN + NGT_HIWATER); > > I'm not sure how to determine what the correct values to call > clist_alloc_cblocks() should be. The values I'm using now cause a > bunch of "interrupt-level buffer overflows" reported from the sio > driver. It looks like I can simply increase the values for tp->t_rawq > but I'd like to understand exactly what they mean first. > > Thanks, > -Archie > > ___________________________________________________________________________ > Archie Cobbs * Whistle Communications, Inc. * http://www.whistle.com > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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