From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Mosberger Date: Tue, 06 Jul 2004 23:45:07 +0000 Subject: Re: BUG 2.6.7 hangs on boot (rx2600) Message-Id: <16619.14724.1660.14476@napali.hpl.hp.com> List-Id: References: <20040622061505.GA23075@cup.hp.com> In-Reply-To: <20040622061505.GA23075@cup.hp.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org >>>>> On Wed, 30 Jun 2004 11:11:04 -0700, Jesse Barnes said: >> Looks like there are more places where kernel does "virt -> phys -> virt". >> And conversion from phys to virt is setting 3 msb to 1. Jesse> Yep, that looks like a problem. The kernel hangs right after Jesse> the local_flush_tlb_all in ia64_tlb_init, and if I comment it Jesse> out I get a "Unable to handle kernel paging request at Jesse> virtual address a000003004289f70" which, on sn2, looks like a Jesse> virt -> phys -> virt conversion (i.e. 0x3004289f70 is a valid Jesse> physical address). I'm not sure this is related. local_flush_tlb_all() simply flushes the entire tlb it doesn't touch the "current" pointer in any shape or fashion. Not doing that flush will leave the kernel with stale TLB entries, so all bets are off. --david