From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from dell-paw-3.cambridge.redhat.com ([195.224.55.237] helo=passion.cambridge.redhat.com) by pentafluge.infradead.org with esmtp (Exim 3.22 #1 (Red Hat Linux)) id 15rI3g-00020f-00 for ; Wed, 10 Oct 2001 13:01:56 +0100 From: David Woodhouse In-Reply-To: <20011010112839.95341.qmail@web11503.mail.yahoo.com> References: <20011010112839.95341.qmail@web11503.mail.yahoo.com> To: Adil EL YOUSSEFI Cc: linux-mtd@lists.infradead.org Subject: Re: A couple of questions Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 10 Oct 2001 13:11:02 +0100 Message-ID: <21379.1002715862@redhat.com> Sender: linux-mtd-admin@lists.infradead.org Errors-To: linux-mtd-admin@lists.infradead.org List-Help: List-Post: List-Subscribe: , List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: adilos2@yahoo.com said: > -> Under what license it is released. My boss wants to > know if he would have to pay in order to put JFFS2 in our product. Under what licence is your product? JFFS2 is under a dual licence - both GPL for compatibility with the Linux kernel, and RHEPL for use in eCos. > -> We are using a flash device with different sector sizes ( 1*32k, > 2*16k,1*64k and the others are 128k ), What size should the JFFS2 > reserved sectors have then ? 128KiB - the 'major' erase size. > -> If JFFS2 is used without enabling compression, will there still be > corner cases in GC requiring 5 reserved sectors and not 2. Probably not. To be honest, it probably wouldn't happen even _with_ compression - I just don't like releasing software that'll 'probably' work :) > -> Why can't JFFS2 be used on Compact flashes ? Technically, it can - we now have a 'blkmtd' driver which uses any block device as backing store for an MTD device - so it can use any hard drive. At the moment, it's painfully slow. Checkpointing ought to fix that, but nobody's currently working on implementing that. -- dwmw2