From owner-freebsd-hackers Tue Apr 2 11:57:39 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id LAA20942 for hackers-outgoing; Tue, 2 Apr 1996 11:57:39 -0800 (PST) Received: from phaeton.artisoft.com (phaeton.Artisoft.COM [198.17.250.211]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id LAA20929 for ; Tue, 2 Apr 1996 11:57:37 -0800 (PST) Received: (from terry@localhost) by phaeton.artisoft.com (8.6.11/8.6.9) id MAA16848; Tue, 2 Apr 1996 12:51:59 -0700 From: Terry Lambert Message-Id: <199604021951.MAA16848@phaeton.artisoft.com> Subject: Re: "active" (INND14unoff4,shared) gets corrupted To: imb@scgt.oz.au (michael butler) Date: Tue, 2 Apr 1996 12:51:59 -0700 (MST) Cc: cracauer@wavehh.hanse.de, angio@shell.ARos.NET, freebsd-hackers@FreeBSD.org In-Reply-To: <199604020512.PAA19435@asstdc.scgt.oz.au> from "michael butler" at Apr 2, 96 03:12:40 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-hackers@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk > > That makes it possible that mmap'ed INN fails for low-load sites (when > > more than one client may send articles) and to work on heavyly-loaded > > servers (when only one client at a time sfeeds news to the server and > > the rest is "consumer"). > > This is consistent with my experience .. I have more than one streaming feed > plus UUCP, gated FidoNet traffic and NNTP readers, It is not a legitimate use to extended a mapped file without remapping it. Specifically, if the mapping goes from a frag to a larger frag (or to a block) as a result of being extended, it's obvious that you should expect problems. That this works on SVR4 and SunOS is an artifact of their VM system cache being device/block based. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.