Date: Wed, 21 Feb 2001 12:20:13 +1100 (EST) From: Bruce Evans <bde@zeta.org.au> To: John Baldwin <jhb@FreeBSD.org> Cc: Poul-Henning Kamp <phk@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org, "Pierre Y. Dampure" <pierre.dampure@westmarsh.com> Subject: Re: cvs commit: src/sys/sys user.h Message-ID: <Pine.BSF.4.21.0102211216590.24536-100000@besplex.bde.org> In-Reply-To: <XFMail.010220024811.jhb@FreeBSD.org>
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On Tue, 20 Feb 2001, John Baldwin wrote: > On 20-Feb-01 Bruce Evans wrote: > > Things in the middle must not change. They must be initialized with whatever > > the used to be, or with dummy values if that is harmless. There would have > > been no problems if this rule were followed for the priority fields. struct > > priority can't be used in struct rusage anyway, since it is a kernel struct. > > Well, it gets more tricky. I've been playing with bumping MAXCOMLEN to 19 (so > it uses a total of 20 rather than 17 chars, which is 32-bit aligned) which > results in expanding teh size of a structure in the middle of kinfo_proc, which > the current kinfo_proc scheme cannot handle. This would also break binary compatibility of ktrace recrords (struct ktr_header). Almost everything that is defined in <sys/param.h> has some binary compatibility issues. Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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