linux-kernel - Re: [PATCH] UBI: add minimal amount of reserved erase blocks in Kconfig

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]

Date:	Fri, 29 Jun 2012 18:07:02 +0300
From:	Artem Bityutskiy <dedekind1@...il.com>
To:	Richard Genoud <richard.genoud@...il.com>
Cc:	David Woodhouse <dwmw2@...radead.org>,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Shmulik Ladkani <shmulik.ladkani@...il.com>
Subject: Re: [PATCH] UBI: add minimal amount of reserved erase blocks in
 Kconfig

On Fri, 2012-06-29 at 16:57 +0200, Richard Genoud wrote:
> 2012/6/29 Artem Bityutskiy <dedekind1@...il.com>:
> >> I was thinking that instead of giving to ubiattach the MBB, we could
> >> give it the MBB percentage (maximum bad blocks percentage of the whole
> >> flash device).
> >> From this % and the whole flash size, we get the MBB number, and set
> >> beb_rsvd_level for each MTD part.
> >
> > Well, I thought that it may be not flexible enough for some people,
> > because you cannot give 1.5%, since flaoting-point arithmetic in the
> > kernel is not used.
> So there's 2 ways to bypass that :
> - use per-1024 instead of percent => the default value would be 20.
> - let ubiattach do the conversion from MBB% to MBB
> I like the 1st one because it gives a number close to what we have in
> the datasheets.
> What do you think ?

Yeah, probably, centi-percents would be OK.

-- 
Best Regards,
Artem Bityutskiy

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