Date: Tue, 26 Aug 2003 09:51:28 +0200 (CEST) From: Lukas Ertl <l.ertl@univie.ac.at> To: Mark Tinguely <tinguely@casselton.net> Cc: current@freebsd.org Subject: Re: Another pmap related panic Message-ID: <20030826094910.M19846@leelou.in.tern> In-Reply-To: <200308221408.h7ME8FtZ014370@casselton.net> References: <200308221408.h7ME8FtZ014370@casselton.net>
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On Fri, 22 Aug 2003, Mark Tinguely wrote: > > > > I got another pmap related panic on my HTT SMP machine. If I don't get > > that completely wrong, it dies again after accessing the return value of > > pmap_pte_quick(). > > I haven't buried myself in the 5.x pmap/vm code, but I did a visual inspection > of the Bosko Milekic "PSE changes" and they do look correct to me -- good job. > > Do these crashes happen with the HTT turned off? > > It appears interesting that both sources of your panics are in a pv_list loop. > I guess I don't know the "vm_page_queue_mtx" locking well enough, but I see > asserts if "MA_OWNED", but I see how these are set to limit one processor > in the queue. I have now applied Boskos Patch to a recent -CURRENT and also turned on INVARIANTS - same panic, same place in pmap_is_modified(). A UP kernel seems to be ok, but I would need to let it run longer. I'm starting to think of bad RAM. regards, le -- Lukas Ertl eMail: l.ertl@univie.ac.at UNIX Systemadministrator Tel.: (+43 1) 4277-14073 Vienna University Computer Center Fax.: (+43 1) 4277-9140 University of Vienna http://mailbox.univie.ac.at/~le/
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