From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 12 Oct 2000 12:05:48 +0200 (CEST) From: Ingo Molnar Reply-To: mingo@elte.hu Subject: Re: [RFC] atomic pte updates for x86 smp In-Reply-To: <200010120856.BAA08092@pizda.ninka.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: "David S. Miller" Cc: Linus Torvalds , blah@kvack.org, "Theodore Y. Ts'o" , linux-kernel@vger.kernel.org, MM mailing list List-ID: On Thu, 12 Oct 2000, David S. Miller wrote: > clear neither user-space pgds, nor user-space pmds in PAE mode > > Eh? > > munmap() --> clear_page_tables() --> free_one_pgd() --> pgd_clear you are right, i was focused too much on the swapping case. I dont think munmap() is a problem in the PAE case. pgd_clear() should stay a 64-bit operation (like in Ben's patch) because we could get a legitimate TLB flush between two 32-bit writes. (the 4 pgd entries are otherwise cached in the CPU core, only TLB flushes reload them.) Ingo -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux.eu.org/Linux-MM/