From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: [RFC][PATCH 5/6] slab: kmem_cache_objs_to_pages() From: Peter Zijlstra In-Reply-To: References: <20061130101451.495412000@chello.nl> > <20061130101922.175620000@chello.nl> > <1164912917.6588.155.camel@twins> Content-Type: text/plain Date: Thu, 30 Nov 2006 20:03:19 +0100 Message-Id: <1164913399.6588.158.camel@twins> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: netdev@vger.kernel.org, linux-mm@kvack.org, David Miller List-ID: On Thu, 2006-11-30 at 11:06 -0800, Christoph Lameter wrote: > On Thu, 30 Nov 2006, Peter Zijlstra wrote: > > > Right, perhaps my bad in wording the intent; the needed information is > > how many more pages would I need to grow the slab with in order to store > > so many new object. > > Would you not have to take objects currently available in > caches into account? If you are short on memory then a flushing of all the > caches may give you the memory you need (especially on a system with a > large number of processors). Sure, but this gives a safe upper bound. -- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Zijlstra Subject: Re: [RFC][PATCH 5/6] slab: kmem_cache_objs_to_pages() Date: Thu, 30 Nov 2006 20:03:19 +0100 Message-ID: <1164913399.6588.158.camel@twins> References: <20061130101451.495412000@chello.nl> > <20061130101922.175620000@chello.nl> > <1164912917.6588.155.camel@twins> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linux-mm@kvack.org, David Miller Return-path: Received: from amsfep17-int.chello.nl ([213.46.243.15]:20863 "EHLO amsfep13-int.chello.nl") by vger.kernel.org with ESMTP id S967890AbWK3TJc (ORCPT ); Thu, 30 Nov 2006 14:09:32 -0500 To: Christoph Lameter In-Reply-To: Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Thu, 2006-11-30 at 11:06 -0800, Christoph Lameter wrote: > On Thu, 30 Nov 2006, Peter Zijlstra wrote: > > > Right, perhaps my bad in wording the intent; the needed information is > > how many more pages would I need to grow the slab with in order to store > > so many new object. > > Would you not have to take objects currently available in > caches into account? If you are short on memory then a flushing of all the > caches may give you the memory you need (especially on a system with a > large number of processors). Sure, but this gives a safe upper bound.