Date: Fri, 5 Dec 1997 09:29:31 -0800 (PST) From: Tom Bartol <bartol@salk.edu> To: Karl Denninger <karl@mcs.net> Cc: Bill Paul <wpaul@skynet.ctr.columbia.edu>, dyson@freebsd.org, current@freebsd.org Subject: Re: mmap() + NFS == &*$%@$!!! Message-ID: <Pine.BSF.3.96.971205091914.291K-100000@dale.salk.edu> In-Reply-To: <19971128230503.28898@mcs.net>
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FYI, Replacing version 1.44 of /sys/nfs/nfs_bio.c with version 1.41 as described below fixed the "Fatal trap 12: page fault while in kernel mode" error that I had been getting frequently while running pine (my /var/mail is an NFS mounted filesystem). NFS read and write performance were not affected by backing out to version 1.41 (to the best of my ability to measure performance). Tom On Fri, 28 Nov 1997, Karl Denninger wrote: > Try using "cvs update -r1.41 nfs_bio.c" in your "sys/nfs" directory and > rebuild the kernel, then see if the problem goes away. > > There are some SERIOUS willies in versions of that file after 1.41. > > -- > -- > Karl Denninger (karl@MCS.Net)| MCSNet - Serving Chicagoland and Wisconsin > http://www.mcs.net/ | T1's from $600 monthly to FULL DS-3 Service > | NEW! K56Flex support on ALL modems > Voice: [+1 312 803-MCS1 x219]| EXCLUSIVE NEW FEATURE ON ALL PERSONAL ACCOUNTS > Fax: [+1 312 803-4929] | *SPAMBLOCK* Technology now included at no cost > > On Fri, Nov 28, 1997 at 11:11:11PM -0500, Bill Paul wrote: > > I did a quick install of the Nov. 28th -current snapshot to test a few > > NIS+ related things and ran into a problem using mmap() with NFS. The > > problem is that it's apparently not too hard at all to wedge either a > > process or the entire system when using mmap() with files on a remote > > NFS filesystem. > > > > -Bill > >
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