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Date: Wed, 25 Apr 2007 10:56:53 -0700 From: "H. Peter Anvin" <hpa@...or.com> To: "Eric W. Biederman" <ebiederm@...ssion.com> CC: Andrew Morton <akpm@...ux-foundation.org>, Jeremy Fitzhardinge <jeremy@...p.org>, Andi Kleen <ak@...e.de>, Zachary Amsden <zach@...are.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] i386: For debugging, make the initial page table setup less forgiving. Eric W. Biederman wrote: >> This patch only affects the initial page tables, which should have been >> thrown out *way* long ago at this point. > > Yes. I noticed this was happening a few days ago. > I must not have mentioned it loudly enough. You mentioned the continued use of init_mm. This is *very* different. What we're seeing here is that ON PSE-CAPABLE HARDWARE, we continue to not just use the init_mm page directory, but the actual page *tables*, which should all have been replaced with PSE large pages to begin with. Reusing the initial page tables on non-PSE-capable hardware *sort of* makes sense, but his hardware should not fall in that category, I don't think? (Unless it's one of these machines that fall over if you map the bottom 4 MB with PSE pages?) -hpa - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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