From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sat, 18 Dec 2004 21:23:06 -0800 (PST) From: Linus Torvalds Subject: Re: [PATCH 4/10] alternate 4-level page tables patches In-Reply-To: <20041219020823.GP771@holomorphy.com> Message-ID: References: <20041218095050.GC338@wotan.suse.de> <41C40125.3060405@yahoo.com.au> <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 Sender: owner-linux-mm@kvack.org Return-Path: To: William Lee Irwin III Cc: Nick Piggin , Andi Kleen , Linux Memory Management , Hugh Dickins , Andrew Morton , Ingo Molnar List-ID: On Sat, 18 Dec 2004, William Lee Irwin III wrote: > > For x86-style MMU's you could literally not bother flushing the TLB at > all, since you'll just switch to another set of pagetables. 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: > The stale translations can't be left around for ASID-tagged TLB's, lest > the next user of the ASID inherit them. We need to (and do) flush the TLB on ASID re-use, regardless. That's true in any case. Linus -- 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