From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sat, 18 Dec 2004 16:20:10 -0800 From: William Lee Irwin III Subject: Re: [PATCH 4/10] alternate 4-level page tables patches Message-ID: <20041219002010.GN771@holomorphy.com> References: <41C3D4C8.1000508@yahoo.com.au> <41C3F2D6.6060107@yahoo.com.au> <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> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <41C4C5C2.5000607@yahoo.com.au> Sender: owner-linux-mm@kvack.org Return-Path: To: Nick Piggin Cc: Andi Kleen , Linux Memory Management , Hugh Dickins , Linus Torvalds , Andrew Morton List-ID: William Lee Irwin III wrote: >> vmas are unmapped one-by-one during process destruction. On Sun, Dec 19, 2004 at 11:05:22AM +1100, Nick Piggin wrote: > Yeah but clear_page_tables isn't called for each vma that is unmapped > at exit time. Rather, one big one is called at the end - I suspect > this is usually more efficient. For clear_page_tables() you want to scan as little as possible. The exit()-time performance issue is tlb_finish_mmu(). -- 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