From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 8 Jun 2002 17:35:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 8 Jun 2002 17:35:54 -0400 Received: from webmail6.rediffmail.com ([202.54.124.151]:5355 "HELO webmail6.rediffmail.com") by vger.kernel.org with SMTP id ; Sat, 8 Jun 2002 17:35:53 -0400 Date: 8 Jun 2002 21:35:27 -0000 Message-ID: <20020608213527.28801.qmail@webmail6.rediffmail.com> MIME-Version: 1.0 From: "tushar korde" Reply-To: "tushar korde" To: linux-kernel@vger.kernel.org Content-type: text/plain; format=flowed Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org hi folks, as kmalloc allocates memory in power of 2 ( starting from 32 ) instead of the size requested. there are following problems : 1) we are allocating at least 32 bytes in all cases ( most of the times it is not required ). 2) if we allocate large memory, internal fregmentation also increases. 3) allocating more memory then the request often leads to programming errors esp. when we store some data and read it back or try to get size of data stored ( though it can be handled but we have to take special care of it at every point ). the solution to above problems may be that we dont allocate objects from the 13 general purpose caches, instead we make a new cache keep its address either in cache_sizes or declare it global. now as the kmalloc is invoked check the memory size requested if predefined sizes are not suitable then make a new object of the size requested ( now here the definition of c_offset flag of cache descriptor may be violated ) and allot it to our new cache and return it . i know that there may be subtle problems in it's implementation. i need your suggestions. is it worth to make efforts in this field. keenly waitinf for ur reply tushar korde _________________________________________________________ Click below to visit monsterindia.com and review jobs in India or Abroad http://monsterindia.rediff.com/jobs