From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from a.ns.miles-group.at ([95.130.255.143] helo=radon.swed.at) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ataRa-0000Et-NI for linux-mtd@lists.infradead.org; Fri, 22 Apr 2016 12:44:24 +0000 Subject: Re: Fwd: Encrypted NAND flash over UBI performance bench marking To: benson_young@sercomm.com References: <5719E36A.3070601@nod.at> Cc: Benson Young , linux-mtd@lists.infradead.org, Ezequiel Garcia From: Richard Weinberger Message-ID: <571A1C88.505@nod.at> Date: Fri, 22 Apr 2016 14:43:52 +0200 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=gbk Content-Transfer-Encoding: 7bit List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Am 22.04.2016 um 11:23 schrieb benson_young@sercomm.com: > Hi Richard, > > If my applications within the EXT4 rootfs do not write on a very regular basis, and setting noatimein > mount option. will I still have NAND thrashing problem? i.e. the file system itself will try to > update/journal/sync on a very regular basis (something like 30 second buffer flush)? As you can see > my knowledge with EXT4 and most file systems are very limited. You mean ext4 on top of a loopback file on UBIFS? I don't think it will be a big problem. But to be sure do some tests. :-) UBI exports ec counter stats in sysfs. Thanks, //richard