lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 2 Aug 2012 19:06:17 +0200 From: Richard Weinberger <richard@....at> To: Tim Bird <tim.bird@...sony.com> Cc: "artem.bityutskiy@...ux.intel.com" <artem.bityutskiy@...ux.intel.com>, "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "adrian.hunter@...el.com" <adrian.hunter@...el.com>, "Heinz.Egger@...utronix.de" <Heinz.Egger@...utronix.de>, "thomas.wucher@...utronix.de" <thomas.wucher@...utronix.de>, "shmulik.ladkani@...il.com" <shmulik.ladkani@...il.com>, "tglx@...utronix.de" <tglx@...utronix.de>, "Marius.Mazarel@...l.ro" <Marius.Mazarel@...l.ro>, "nyoushchenko@...sta.com" <nyoushchenko@...sta.com> Subject: Re: UBI fastmap updates Am Thu, 2 Aug 2012 10:03:04 -0700 schrieb Tim Bird <tim.bird@...sony.com>: > >> If everything goes wrong, fastmap makes sure that no fastmap is on > >> flash. > >> In case of a powercut we fall back to scanning mode. > >> R/O mode is overkill IMHO. > > > > So can I interpret this the following way. Not only fastmap give no > > guarantees that it exists after an unclean reboot, it does not even > > give guarantees that it exists after a clean reboot. > > > > Unless I am confused, the fastmap design is over-simplified. > > Fastmap is an optimization. Maybe I'm missing something, but > I'm not sure why, if the optimization stopped working, you > would want to reduce the functionality of the file system. That's *exactly* my point. If fastmap is available - fine, we have fast boot - yay! But if something really nasty happens we can safely fall back to scanning mode. And fastmap is designed to allow this. Thanks, //richard -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists