From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752661Ab1JUXuW (ORCPT ); Fri, 21 Oct 2011 19:50:22 -0400 Received: from usindpps04.hds.com ([207.126.252.17]:42087 "EHLO usindpps04.hds.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751425Ab1JUXuV convert rfc822-to-8bit (ORCPT ); Fri, 21 Oct 2011 19:50:21 -0400 From: Satoru Moriya To: Rik van Riel , Andrew Morton CC: David Rientjes , Randy Dunlap , Satoru Moriya , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "lwoodman@redhat.com" , Seiji Aguchi , "hughd@google.com" , "hannes@cmpxchg.org" Date: Fri, 21 Oct 2011 19:48:48 -0400 Subject: RE: [PATCH -v2 -mm] add extra free kbytes tunable Thread-Topic: [PATCH -v2 -mm] add extra free kbytes tunable Thread-Index: AcyJGVznsX9NDC5uS3SAH8qxSUPXxwHMp11C Message-ID: <65795E11DBF1E645A09CEC7EAEE94B9CB4F747B1@USINDEVS02.corp.hds.com> References: <20110901105208.3849a8ff@annuminas.surriel.com> <20110901100650.6d884589.rdunlap@xenotime.net> <20110901152650.7a63cb8b@annuminas.surriel.com> <20111010153723.6397924f.akpm@linux-foundation.org> <65795E11DBF1E645A09CEC7EAEE94B9CB516CBC4@USINDEVS02.corp.hds.com> <20111011125419.2702b5dc.akpm@linux-foundation.org> <65795E11DBF1E645A09CEC7EAEE94B9CB516CBFE@USINDEVS02.corp.hds.com> <20111011135445.f580749b.akpm@linux-foundation.org> <4E95917D.3080507@redhat.com> <20111012122018.690bdf28.akpm@linux-foundation.org>,<4E95F167.5050709@redhat.com> In-Reply-To: <4E95F167.5050709@redhat.com> Accept-Language: ja-JP, en-US Content-Language: ja-JP X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: ja-JP, en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 X-Proofpoint-Spam-Details: rule=outbound_policy_notspam policy=outbound_policy score=0 spamscore=0 ipscore=0 suspectscore=1 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=6.0.2-1012030000 definitions=main-1110210298 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/12/2011 03:58 PM, Rik van Riel wrote: > On 10/12/2011 03:20 PM, Andrew Morton wrote: >> On Wed, 12 Oct 2011 09:09:17 -0400 >> Rik van Riel wrote: >> >> Do we actually have a real-world application which is hurting from >> this? > > Satoru-san? Sorry for late reply. We do. Basically we need this kind of feature for almost all our latency sensitive applications to avoid latency issue in memory allocation. Currently we run those applications on custom kernels which this kind of patch is applied to. But it is hard for us to support every kernel version for it. Also there are several customers who can't accept a custom kernel and so they must use other commercial Unix. If this feature is accepted, they will definitely use it on their systems. Thanks, Satoru From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta7.messagelabs.com (mail6.bemta7.messagelabs.com [216.82.255.55]) by kanga.kvack.org (Postfix) with ESMTP id B28056B002D for ; Fri, 21 Oct 2011 19:50:16 -0400 (EDT) From: Satoru Moriya Date: Fri, 21 Oct 2011 19:48:48 -0400 Subject: RE: [PATCH -v2 -mm] add extra free kbytes tunable Message-ID: <65795E11DBF1E645A09CEC7EAEE94B9CB4F747B1@USINDEVS02.corp.hds.com> References: <20110901105208.3849a8ff@annuminas.surriel.com> <20110901100650.6d884589.rdunlap@xenotime.net> <20110901152650.7a63cb8b@annuminas.surriel.com> <20111010153723.6397924f.akpm@linux-foundation.org> <65795E11DBF1E645A09CEC7EAEE94B9CB516CBC4@USINDEVS02.corp.hds.com> <20111011125419.2702b5dc.akpm@linux-foundation.org> <65795E11DBF1E645A09CEC7EAEE94B9CB516CBFE@USINDEVS02.corp.hds.com> <20111011135445.f580749b.akpm@linux-foundation.org> <4E95917D.3080507@redhat.com> <20111012122018.690bdf28.akpm@linux-foundation.org>,<4E95F167.5050709@redhat.com> In-Reply-To: <4E95F167.5050709@redhat.com> Content-Language: ja-JP Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Sender: owner-linux-mm@kvack.org List-ID: To: Rik van Riel , Andrew Morton Cc: David Rientjes , Randy Dunlap , Satoru Moriya , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "lwoodman@redhat.com" , Seiji Aguchi , "hughd@google.com" , "hannes@cmpxchg.org" On 10/12/2011 03:58 PM, Rik van Riel wrote: > On 10/12/2011 03:20 PM, Andrew Morton wrote: >> On Wed, 12 Oct 2011 09:09:17 -0400 >> Rik van Riel wrote: >> >> Do we actually have a real-world application which is hurting from >> this? >=20 > Satoru-san? Sorry for late reply. We do. Basically we need this kind of feature for almost all our latency sensitive applications to avoid latency issue in memory allocation. Currently we run those applications on custom kernels which this kind of patch is applied to. But it is hard for us to support every kernel version for it. Also there are several customers who can't accept a custom kernel and so they must use other commercial Unix. If this feature is accepted, they will definitely use it on their systems. Thanks, Satoru= -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org