From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx203.postini.com [74.125.245.203]) by kanga.kvack.org (Postfix) with SMTP id 3FC0A6B006E for ; Fri, 8 Jun 2012 03:28:33 -0400 (EDT) From: Subject: RE: [PATCH 2/5] vmevent: Convert from deferred timer to deferred work Date: Fri, 8 Jun 2012 07:28:18 +0000 Message-ID: <84FF21A720B0874AA94B46D76DB98269045F7918@008-AM1MPN1-004.mgdnok.nokia.com> References: <20120601122118.GA6128@lizard> <1338553446-22292-2-git-send-email-anton.vorontsov@linaro.org> <4FD170AA.10705@gmail.com> <20120608065828.GA1515@lizard> <84FF21A720B0874AA94B46D76DB98269045F7890@008-AM1MPN1-004.mgdnok.nokia.com> <84FF21A720B0874AA94B46D76DB98269045F78E1@008-AM1MPN1-004.mgdnok.nokia.com> In-Reply-To: Content-Language: en-US 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: kosaki.motohiro@gmail.com Cc: anton.vorontsov@linaro.org, penberg@kernel.org, b.zolnierkie@samsung.com, john.stultz@linaro.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linaro-kernel@lists.linaro.org, patches@linaro.org, kernel-team@android.com > -----Original Message----- > From: ext KOSAKI Motohiro [mailto:kosaki.motohiro@gmail.com] > Sent: 08 June, 2012 10:23 ... > > If you wakeup only by signal when memory situation changed you can be > not mlocked. > > Mlocking uses memory very inefficient way and usually cannot be applied > for apps which wants to be notified due to resources restrictions. >=20 > That's your choice. If you don't need to care cache dropping, We don't > enforce it. I only pointed out your explanation was technically incorrect= . My explanation is correct. That is an overhead you have to pay if start to = use API based on polling from user-space and this overhead narrows API appl= icability. Moving all times/tracking to kernel avoid useless wakeups in user-space. -- 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