Date: Wed, 11 Jan 2012 11:57:31 -0500 From: Martin Cracauer <cracauer@cons.org> To: freebsd-current@freebsd.org Subject: Data corruption over NFS in -current Message-ID: <20120111165714.GA46594@cons.org>
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I'm sorry for the unspecific bug report but I thought a heads-up is better than none. $ uname -a FreeBSD wings.cons.org 10.0-CURRENT FreeBSD 10.0-CURRENT #2: Wed Dec 28 12:19:21 EST 2011 cracauer@wings.cons.org:/usr/src/sys/amd64/compile/WINGS amd64 I see filesystem corruption on NFS filesystems here. I am running a heavy shellscript that is noodling around with ascii files assembling them with awk and whatnot. Some actions are concurrent with up to 21 forks doing full-CPU load scripting. This machine is a K8 with a total of 8 cores, diskless NFS and memory filesystem for /tmp. I observe two problems: - for no reason whatsoever, some files change from my (user/group) cracauer/wheel to root/cracauer - the same files will later be corrupted. The beginning of the file is normal but then it has what looks like parts of /usr/ports, including our CVS files and binary junk, mostly zeros I did do some ports building lately but not at the same time that this problem manifested itself. I speculate some ports blocks were still resident in the filesystem buffer cache. Server is Linux. Martin -- %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Martin Cracauer <cracauer@cons.org> http://www.cons.org/cracauer/
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