Date: Fri, 5 Dec 1997 11:37:07 -0600 From: Karl Denninger <karl@mcs.net> To: Tom Bartol <bartol@salk.edu> Cc: Bill Paul <wpaul@skynet.ctr.columbia.edu>, dyson@freebsd.org, current@freebsd.org Subject: Re: mmap() + NFS == &*$%@$!!! Message-ID: <19971205113707.33845@mcs.net> In-Reply-To: <Pine.BSF.3.96.971205091914.291K-100000@dale.salk.edu>; from Tom Bartol on Fri, Dec 05, 1997 at 09:29:31AM -0800 References: <19971128230503.28898@mcs.net> <Pine.BSF.3.96.971205091914.291K-100000@dale.salk.edu>
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Yep. I'm running with 1.41 of that file here as well. Later versions are NOT stable. Frankly, I'm surprised that John or someone else hasn't backed out the commits beyond 1.41 by now - this is an old problem, dating back a few months. -- -- 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, Dec 05, 1997 at 09:29:31AM -0800, Tom Bartol wrote: > > 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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