Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753404AbZGNDum (ORCPT ); Mon, 13 Jul 2009 23:50:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753219AbZGNDum (ORCPT ); Mon, 13 Jul 2009 23:50:42 -0400 Received: from smtp-out.google.com ([216.239.33.17]:47185 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753176AbZGNDul (ORCPT ); Mon, 13 Jul 2009 23:50:41 -0400 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=mime-version:in-reply-to:references:date:message-id:subject:from:to: cc:content-type:content-transfer-encoding:x-system-of-record; b=HT+6hKSyXLoT/sMR3QrZ95jm9CQvQkRa74J4L8bU2YrgSctdAwQShtP/gmsPrh/7t k9tYJcrVOt9+ASfCTMALw== MIME-Version: 1.0 In-Reply-To: <20090714084950.2401d9a6.kamezawa.hiroyu@jp.fujitsu.com> References: <20090710230043.16778.29656.stgit@hastromil.mtv.corp.google.com> <20090710230205.16778.11707.stgit@hastromil.mtv.corp.google.com> <4A5AA3E7.9070800@cn.fujitsu.com> <20090713150303.70ab5176.kamezawa.hiroyu@jp.fujitsu.com> <2f86c2480907130827u7d2b062bw26bbb80a8e3de657@mail.gmail.com> <20090714084950.2401d9a6.kamezawa.hiroyu@jp.fujitsu.com> Date: Mon, 13 Jul 2009 20:50:33 -0700 Message-ID: <6599ad830907132050n226aecb3ucab6746a4d0e81fa@mail.gmail.com> Subject: Re: [PATCH 3/3] Quick vmalloc vs kmalloc fix to the case where array size is too large From: Paul Menage To: KAMEZAWA Hiroyuki Cc: Benjamin Blum , Li Zefan , linux-kernel@vger.kernel.org, containers@lists.linux-foundation.org, akpm@linux-foundation.org, serue@us.ibm.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-System-Of-Record: true Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 656 Lines: 16 On Mon, Jul 13, 2009 at 4:49 PM, KAMEZAWA Hiroyuki wrote: > IIUC, this place, .../procs interface is not so important for performance > as to being allowed this ugly conding. > It's not just the calling thread that suffers from the overhead - we've seen performance hits on other processes on a machine due to the TLB-shootdown overhead associated with vmalloc()/vfree(). Paul -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/