From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Lameter Date: Mon, 24 Mar 2008 18:27:06 +0000 Subject: Re: [11/14] vcompound: Fallbacks for order 1 stack allocations on Message-Id: List-Id: References: <20080321061726.782068299@sgi.com> <20080321.002502.223136918.davem@davemloft.net> <20080321.145712.198736315.davem@davemloft.net> In-Reply-To: <20080321.145712.198736315.davem@davemloft.net> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: David Miller Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org On Fri, 21 Mar 2008, David Miller wrote: > The thing to do is to first validate the way that IA64 > handles recursive TLB misses occuring during an initial > TLB miss, and if there are any limitations therein. I am familiar with that area and I am resonably sure that this is an issue on IA64 under some conditions (the processor decides to spill some registers either onto the stack or into the register backing store during tlb processing). Recursion (in the kernel context) still expects the stack and register backing store to be available. ccing linux-ia64 for any thoughts to the contrary. The move to 64k page size on IA64 is another way that this issue can be addressed though. So I think its best to drop the IA64 portion.