Date: Mon, 14 Dec 1998 19:16:00 -0500 (EST) From: Alfred Perlstein <bright@hotjobs.com> To: "David G. Andersen" <danderse@cs.utah.edu> Cc: spork <spork@super-g.com>, Bernd Walter <ticso@cicely.de>, Kevin Day <toasty@home.dragondata.com>, hackers@FreeBSD.ORG Subject: Re: NFS thoughts Message-ID: <Pine.BSF.4.05.9812141912150.27793-100000@bright.fx.genx.net> In-Reply-To: <13941.42539.360724.653774@torrey.cs.utah.edu>
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On Mon, 14 Dec 1998, David G. Andersen wrote: > Lo and Behold, Alfred Perlstein said: > > > > > > I also haven't seen the "I've mounted soft and intr, yet things still > > > hang" behaviour using version 2 and udp. Any consensus on that? > > > > why would you mount _both_ soft and intr? to me they seem mutually > > exclusive. > > > > 'intr' allows you to intrupt a hung NFS proc so that it recives a > > transient error on a filesystem call, the process will hang forever unless > > NFS comes back, or you ^C it > > > > 'soft' automates that with a timeout however signals won't work, but after > > some time the process will unhang and get an error on the filesystem call. > > > > Are you trying to get an auto-timeout like mount with that ability to ^C? > > > > generally intr is best, the idea of many processes timeing out on NFS > > mounts should the server crash, makes my stomach turn. > > Note that until kern/8732 is fixed, this can be dangerous (hang > your machine dangerous). Mounting with 'intr' and then sending > SIGINTR while a process is attempting to flush a dirty block will > cause the machine to wedge. > > -Dave > there's about 5 suggested fixes in that PR, can someone take a look? maybe Matt "the PR killer" Dillon can take a look? :) breaking semantics a bit is a far better solution than a wedged system which allows for zero semantics. :) Alfred Perlstein - Programmer, HotJobs Inc. - www.hotjobs.com -- There are operating systems, and then there's FreeBSD. -- http://www.freebsd.org/ 3.0-current To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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