linux-ext4 - Re: [PATCH 2/3] ext4: Context support

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:	Thu, 14 Jun 2012 13:05:33 -0400
From:	Ted Ts'o <tytso@....edu>
To:	Nicolas Pitre <nicolas.pitre@...aro.org>
Cc:	Arnd Bergmann <arnd.bergmann@...aro.org>,
	Alex Lemberg <Alex.Lemberg@...disk.com>,
	HYOJIN JEONG <syr.jeong@...sung.com>,
	Saugata Das <saugata.das@...aro.org>,
	Artem Bityutskiy <dedekind1@...il.com>,
	Saugata Das <saugata.das@...ricsson.com>,
	linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-mmc@...r.kernel.org, patches@...aro.org, venkat@...aro.org,
	"Luca Porzio (lporzio)" <lporzio@...ron.com>
Subject: Re: [PATCH 2/3] ext4: Context support

On Thu, Jun 14, 2012 at 12:14:13PM -0400, Nicolas Pitre wrote:
> Let's not forget that, in almost all cases, filesystem images are not 
> created live on the final medium.  Factories are picking a batch of 
> flash devices and a pre-built filesystem image is stamped on them, and 
> there might not even be a guarantee that those flash devices will all 
> have the same characteristics.  So to say that making this tuning at 
> mkfs time is probably not the best strategy.

Sure, that just means there needs to be a way of overriding the values
used by mke2fs.  (Because as you create the fs image, the storage
device parameters may make a difference to how blocks get allocated.)

The reason why I talk about making it work automatically at mke2fs
time is that the vast majority of created file systems (where a
specially created fs by a handset vendor counts as "one", even if it
then gets stamped on millions of devices), the end user is someone
naive/oblivious, so the right thing *has* to happen by default in the
common case of running mke2fs on the storage device where the file
system gets used.

					- Ted
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html