From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bjorn Helgaas Date: Fri, 25 Jan 2002 16:08:15 +0000 Subject: Re: [Linux-ia64] Patch to fix latest kernels issue with FW83 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 Thursday 24 January 2002 12:46 pm, Mallick, Asit K wrote: > We have root caused the stability problem with latest kernels and FW83 > (LION platform). The following patch (based on 2.4.17) fixes the > problem. ... > - "ld4.bias r2 = [%0]\n" \ > + "ld4 r2 = [%0]\n" \ Can you elaborate on this a bit? All I know about ld.bias is the statement in section 4.4.6.1 of Vol 1 that [ld.bias] is a hint to the implementation to acquire exclusive ownership of the line containing the addressed data. The bias hint does not affect program functionality and may be ignored by the implementation. I can believe the patch is a performance optimization (my intuition is that when the holder writes the lock to release it, the waiter will merely invalidate its shared line, where it previously had to invalidate and copyout its exclusive line), but I don't see how this should improve stability. What am I missing? -- Bjorn Helgaas - bjorn_helgaas@hp.com Linux Systems Operation R&D Hewlett-Packard