linux-kernel - Re: UBI fastmap updates

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1343930368.25013.215.camel@sauron.fi.intel.com>
Date:	Thu, 02 Aug 2012 20:59:28 +0300
From:	Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>
To:	Richard Weinberger <richard@....at>
Cc:	Tim Bird <tim.bird@...sony.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

On Thu, 2012-08-02 at 19:45 +0200, Richard Weinberger wrote:
> This should be very easy task.

Right. But unfortunately, I had to spend a lot of time writing lengthy
e-mails. You could hold your horses for a minute, ask specific questions
and find out what was my concern.

> How much PEB should be reserved? 2 x sizeof(fastmap)? 

Is there any reason why it cannot be the _exact_ maximum number? Not
more and not less.

If I understand correctly, fastmap size is a function of total PEBs
count. You should be able to calculate the maximum size precisely.

-- 
Best Regards,
Artem Bityutskiy

Download attachment "signature.asc" of type "application/pgp-signature" (837 bytes)