From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 13 Apr 2007 13:20:30 +0200 From: Nick Piggin Subject: Re: [patch] generic rwsems Message-ID: <20070413112029.GD27914@wotan.suse.de> References: <20070413100416.GC31487@wotan.suse.de> <200704131253.49301.ak@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200704131253.49301.ak@suse.de> Sender: owner-linux-mm@kvack.org Return-Path: To: Andi Kleen Cc: Andrew Morton , David Howells , Linux Kernel Mailing List , Linux Memory Management List , Linus Torvalds List-ID: On Fri, Apr 13, 2007 at 12:53:49PM +0200, Andi Kleen wrote: > On Friday 13 April 2007 12:04:16 Nick Piggin wrote: > > OK, this patch is against 2.6.21-rc6 + Mathieu's atomic_long patches. > > > > Last time this came up I was asked to get some numbers, so here are > > some in the changelog, captured with a simple kernel module tester. > > I got motivated again because of the MySQL/glibc/mmap_sem issue. > > > > This patch converts all architectures to a generic rwsem implementation, > > which will compile down to the same code for i386, or powerpc, for > > example, and will allow some (eg. x86-64) to move away from spinlock > > based rwsems. > > > > Comments? > > Fine for me from the x86-64 side. Some more validation with a test suite > would be good though. David had a test suite somewhere, so I'll give that a run. -- 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: email@kvack.org