From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Mosberger Date: Fri, 08 Nov 2002 19:26:31 +0000 Subject: Re: [Linux-ia64] reader-writer livelock problem Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org >>>>> On Fri, 8 Nov 2002 19:19:07 +0000, Matthew Wilcox said: Matthew> On Fri, Nov 08, 2002 at 12:05:30PM -0600, Van Maren, Kevin Matthew> wrote: >> Absolutely you should minimize the locking contention. However, >> that isn't always possible, such as when you have 64 processors >> contending on the same resource. Matthew> if you've got 64 processors contending on the same Matthew> resource, maybe you need to split that resource up so they Matthew> can have a copy each. all that cacheline bouncing can't do Matthew> your numa boxes any good. Matthew, please understand that this is NOT a performance problem. It's a correctness problem. If livelock can resolut from read-write locks, it's a huge security problem. Period. --david