linux-kernel - Re: lz4hc compression in UBIFS?

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:	Mon, 28 Oct 2013 20:22:38 +0400
From:	Konstantin Tokarev <annulen@...dex.ru>
To:	Yann Collet <yann.collet.73@...il.com>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	Brent Taylor <motobud@...il.com>,
	Artem Bityutskiy <dedekind1@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: lz4hc compression in UBIFS?



24.10.2013, 19:15, "Konstantin Tokarev" <annulen@...dex.ru>:
> Attached patch to crypto API wrapper for lz4hc seems to fix the issue. I can save
> and read files on LZ4HC-compressed volume, and I'm running on LZ4HC-compressed rootfs,
> flashed from mkfs.ubifs generated image (patch by Elie De Brauwer). My software
> works correctly.
>
> Unfortunately, on my board LZ4HC-compressed UBIFS volume performs noticeable worse
> than LZO, while still faster than zlib. I guess the reason is that CPU is no longer a
> bottleneck for my system, but NAND speed.
>
> Thank you all for your help!

Can anyone review the correctness of my patch? Looks like API of LZ4 decompressor is
used wrong way in crypto API.

-- 
Regards,
Konstantin
--
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/