From mboxrd@z Thu Jan 1 00:00:00 1970 Subject: Re: Release of UBIL: ubi with log From: Artem Bityutskiy To: Brijesh Singh In-Reply-To: References: <6b5362aa1002260458j571852cbl2f2d86130828333a@mail.gmail.com> <1267559131.1883.1.camel@localhost.localdomain> Content-Type: text/plain; charset="UTF-8" Date: Fri, 23 Apr 2010 15:11:50 +0300 Message-ID: <1272024710.6917.11.camel@localhost> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: David Woodhouse , rohitvdongre@gmail.com, linux-mtd@lists.infradead.org, Corentin Chary , Adrian Hunter Reply-To: dedekind1@gmail.com List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Fri, 2010-04-02 at 00:36 +0530, Brijesh Singh wrote: > On Thu, Apr 1, 2010 at 5:29 PM, Corentin Chary wrote: > > On Thu, Apr 1, 2010 at 1:14 PM, Brijesh Singh wrote: > >> Hi, > >> > >> On Wed, Mar 31, 2010 at 6:27 PM, Corentin Chary > >> wrote: > >>> On Tue, Mar 2, 2010 at 8:45 PM, Artem Bityutskiy wrote: > >>>> On Fri, 2010-02-26 at 18:28 +0530, Brijesh Singh wrote: > >>>>> Hi, > >>>>> It gives me great pleasure in sharing UBIL: ubi with log. We have > >>>>> added logging functionality to ubi for reducing mount time. > >>>>> UBIL uses the "same source base of UBI". The logging functionality can > >>>>> be added or removed at compile time using "make menuconfig option". > >>>>> > >>>>> We have seen mount time reduction of 50% in 1GB NAND. We are expecting > >>>>> even better results for larger flash memories. > >>>>> > >>>>> The source code of UBIL can be found in the following git tree: > >>>>> http://git.infradead.org/users/brijesh/ubi-2.6.git > >>>>> > >>>> > >>>> Sounds interesting! However, I'm out of office till end of March, and > >>>> won't be able to look closely at this. But hopefully others will try it. > >>>> > >>> > >>> Hi, > >>> Didn't took the time to read the code, I'll try to do so soon. > >>> Could you tell us more about what you did and how it works ? > >>> Is it similar to yaffs checkpoints ? When are the log written ? > >> Not sure with yaffs checkpoints. > > > > Yaffs works by writting it's internal memory representation on the > > nand while unmounting, so it seems to be different. > > Right now, all the valid log is kept in buffer. This is written at > umount/ when log is full. So do you mean that in case of a power-cut, the log is lost and UBI will have to do scanning? -- Best Regards, Artem Bityutskiy (Артём Битюцкий)