From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx189.postini.com [74.125.245.189]) by kanga.kvack.org (Postfix) with SMTP id 8196F6B005D for ; Thu, 2 Aug 2012 09:50:12 -0400 (EDT) Date: Thu, 2 Aug 2012 15:50:07 +0200 From: Michal Hocko Subject: Re: [question] how to increase the number of object on cache? Message-ID: <20120802135007.GB18089@dhcp22.suse.cz> References: <5F2C6DA655B36C43B21C7FB179CEC9F4E3F157BDEE@HKMAIL02.nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5F2C6DA655B36C43B21C7FB179CEC9F4E3F157BDEE@HKMAIL02.nvidia.com> Sender: owner-linux-mm@kvack.org List-ID: To: Shawn Joo Cc: "cl@linux-foundation.org" , "penberg@kernel.org" , "mpm@selenic.com" , "linux-mm@kvack.org" On Thu 02-08-12 20:20:25, Shawn Joo wrote: > Dear Experts, > > I would like to know a mechanism, how to increase the number of object and where the memory is from. > > (because when cache is created by "kmem_cache_create", there is only object size, but no number of the object) > For example, "size-65536" does not have available memory from below dump. > In that state, if memory allocation is requested to "size-65536", Is this a follow up for http://www.spinics.net/lists/linux-mm/msg39252.html? It would be better to follow the thread in that case. > 1. How to allocate/increase the number of object on "size-65536"? Object count is increased automatically and transparently for the cache users. Why would you want to control its size from the outside? > 2. Where is the new allocated memory from? (from buddy?) page allocator when it cannot find any room in the internally available space. Have a look at [1] if you want to learn more about the slab allocator (the code has changed since then but the princibles are still valid). [1] http://kernel.org/doc/gorman/html/understand/understand011.html -- Michal Hocko SUSE Labs -- 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