From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sat, 18 Dec 2004 22:02:40 -0800 From: William Lee Irwin III Subject: Re: [PATCH 4/10] alternate 4-level page tables patches Message-ID: <20041219060240.GQ771@holomorphy.com> References: <20041218110608.GJ771@holomorphy.com> <41C411BD.6090901@yahoo.com.au> <20041218113252.GK771@holomorphy.com> <41C41ACE.7060002@yahoo.com.au> <20041218124635.GL771@holomorphy.com> <41C4C5C2.5000607@yahoo.com.au> <20041219002010.GN771@holomorphy.com> <20041219020823.GP771@holomorphy.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org Return-Path: To: Linus Torvalds Cc: Nick Piggin , Andi Kleen , Linux Memory Management , Hugh Dickins , Andrew Morton , Ingo Molnar List-ID: On Sat, Dec 18, 2004 at 09:23:06PM -0800, Linus Torvalds wrote: > Yes, we could avoid the flush entirely, since we've already "flushed" the > TLB by virtue of having switched to another TLB. > And it's in no way x86-specific: I'd say there's a little reliance on the semantics being emulated by other architectures, but I doubt it strongly influences performance. On Sat, 18 Dec 2004, William Lee Irwin III wrote: >> The stale translations can't be left around for ASID-tagged TLB's, lest >> the next user of the ASID inherit them. On Sat, Dec 18, 2004 at 09:23:06PM -0800, Linus Torvalds wrote: > We need to (and do) flush the TLB on ASID re-use, regardless. That's true > in any case. If it's already been audited and there's nothing to do, all the better. -- wli -- 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-mm.org/ . Don't email: aart@kvack.org