Date: Fri, 14 Mar 1997 10:12:33 -0600 From: Karl Denninger <karl@Mcs.Net> To: Terry Lambert <terry@lambert.org> Cc: Karl Denninger <karl@Mcs.Net>, current@freebsd.org Subject: Re: Yikes! Current / Lite2 kernel has MAJOR NFS client problems Message-ID: <19970314101233.31910@Jupiter.Mcs.Net> In-Reply-To: <199703102233.PAA23787@phaeton.artisoft.com>; from Terry Lambert on Mon, Mar 10, 1997 at 03:33:53PM -0700 References: <19970309145605.07984@Jupiter.Mcs.Net> <199703102233.PAA23787@phaeton.artisoft.com>
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On Mon, Mar 10, 1997 at 03:33:53PM -0700, Terry Lambert wrote: > > Be EXTREMELY careful if you try to run a LITE2 kernel in an NFS environment. > > > > As it sits right now, you'll get tons of panics out of "page not present" > > faults in the event any executable is grabbed over NFS. > > > > I'll start looking at this if someone has an idea where it would be coming > > from. Is this a "dirty page" problem in that the page isn't being fetched > > when it should be? > > Look at the NFS differences for the pre-merge code vs. the Lite code > that should be the first rev in the tree. Basically, the cache > unification process has changes the FS/buffer interface, and you > need to propagate some stuff down to the FS that NFS is a client > of for it to be truly happy. The diff should pinpoint it for you. > > > Terry Lambert > terry@lambert.org I'll have to take a look at it -- basically, you get a "page not present" panic within minutes (literally) using the LITE2-merged stuff if you mount a directory and run executables off that mount point. Until this is fixed DO NOT mount executable directories from a remote NFS server. This is a serious problem and will lead to resets within 2-10 minutes! -- -- Karl Denninger (karl@MCS.Net)| MCSNet - The Finest Internet Connectivity http://www.mcs.net/~karl | T1's from $600 monthly to FULL DS-3 Service | 99 Analog numbers, 77 ISDN, Web servers $75/mo Voice: [+1 312 803-MCS1 x219]| Email to "info@mcs.net" WWW: http://www.mcs.net/ Fax: [+1 312 803-4929] | 2 FULL DS-3 Internet links; 400Mbps B/W Internal
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