Date: Fri, 11 Dec 1998 03:52:27 -0500 (EST) From: Alfred Perlstein <bright@hotjobs.com> To: Warner Losh <imp@village.org> Cc: Matthew Dillon <dillon@apollo.backplane.com>, Archie Cobbs <archie@whistle.com>, jwd@unx.sas.com, freebsd-current@FreeBSD.ORG Subject: Re: inetd: realloc/free bug Message-ID: <Pine.BSF.4.05.9812110351240.27793-100000@bright.fx.genx.net> In-Reply-To: <199812110722.AAA00650@harmony.village.org>
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On Fri, 11 Dec 1998, Warner Losh wrote: > In message <199812110717.XAA35358@apollo.backplane.com> Matthew Dillon writes: > : I seem to recall linux returning the time remaining a long time ago, > : but I think they ripped it out. I don't have a linux box handy to > : test the linux current kernel. > > Linux implemented the timeval stomping version of select. It was the > first OS to do this. At the time they claimed that BSD 4.4 would be > doing this and that they were going to be compatible with that, plus > it was listed as a bug. BSD 4.4 came out, and it didn't change this > part of the interface. There were boatloads of programs that were > inexpertly ported to Linux that exhibited cpu eating problems. Turns > out that they weren't robust enough to deal with the timeval stomping > interface. In time they created a bsd_select, which was what all user > progams used. I think it is possible to get the "new" linux behavior, > but I don't know how. > > : I definitely think it's a mistake to change select()'s timeout > : operation, too many programs pre-set the timeval and assume it will > : not be changed on multiple calls to select(). If we were to > : implement a returned-time it would have to be with a new system > : call. > > Agreed. ugh, all my wasted cycles resetting the timeval "just in case" select2() anyone? Alfred Perlstein - Programmer, HotJobs Inc. - www.hotjobs.com -- There are operating systems, and then there's FreeBSD. -- http://www.freebsd.org/ 3.0-current > Warner > > 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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