Date: Sun, 23 Dec 2001 00:52:14 +0100 From: Nils Holland <nils@tisys.org> To: freebsd-stable@freebsd.org Subject: NFS problems in 4.5-PRERELEASE Message-ID: <20011223005213.A57692@tisys.org>
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Hi folks, I will do some more research on this problem myself tomorrow (it's fairly late here), but I thought I might already post a message about this today: From what I have read, the fixes to the NFS problems that Jordan mentioned at the beginning of last week are by now in RELENG_4. However, a updated system (world, kernel) as of this morning causes me serious headache. There seems to be an NFS problem, but it's highly strange in nature, and I have not yet been able to figure it out. Anyway, here's what happens: I copied /usr/src, /usr/obj and /usr/ports from one machine to another via NFS. src and obj are fairly normal, ports included about 300 MB worth of distfiles besides the ports skeleton itself. Now, the NFS copy of src and ports does *always* work (I tried 10 times), while copying ports seems to crash my NFS client in 2 out of three cases. The exact panic message I get (which is probably not that useful by itself, but I'll post it anyway) is this: Fatal Trap 12: Page fault while in kernel mode fault virtual address = 0xe8 fault code = supervisor read, page not present instruction pointer = 0x8:0xc01b61cc stack pointer = 0x10:0xe1c73cb8 frame pointer = 0x10:0xe1c73cd4 code segment = base 0x0, limit 0xfffff, type 0x1b DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 367 (cp) interrupt mask = none trap number = 12 panic: page fault And now it gets interesting: This crash does *not* occur randomly, but as my tests have shown, it occurs *always* when /usr/ports/japanese/mnews is being copied (as shown by cp -v). To prevent misunderstandings, let me reword this: The problem seems to occur 2 out of 3 times, but *when* it occurs, then always at japanese/mnews, i.e. always when copying the same file. This fact is it that makes me believe that it's actually a bug in the code and not some hardware / random problem with my machine (if it were, it surely wouldn't occur just at the same file every time...) If anyone has any suggestions as far as this problem is concerned, I'd be glad to hear about it. I'll do some research on this tomorrow and post any interesting results. I may want to set my system up to take crash dump, but before I do that, I'll probably try to find out if there's a pattern somewhere, i.e. if I can crash my machine by *just* copying japanese/mnews, or if I can successfully do several copy attempts of /usr/ports when leaving japanese/mnews out... Good night Nils -- Nils Holland Ti Systems - FreeBSD in Tiddische, Germany http://www.tisys.org * nils@tisys.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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