linux-kernel - Re: [PATCH 2/4] EXT4: Set NOSEC flag early when there are no xattrs

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: <20110528144331.GA25561@alboin.amr.corp.intel.com>
Date:	Sat, 28 May 2011 07:43:31 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Marco Stornelli <marco.stornelli@...il.com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, viro@...iv.linux.org.uk,
	tytso@....edu
Subject: Re: [PATCH 2/4] EXT4: Set NOSEC flag early when there are no xattrs

On Sat, May 28, 2011 at 11:08:01AM +0200, Marco Stornelli wrote:
> Il 28/05/2011 00:54, Andi Kleen ha scritto:
> >From: Andi Kleen<ak@...ux.intel.com>
> >
> >This avoids a xattr lookup on every write.
> >
> >Cc: tytso@....edu
> >Signed-off-by: Andi Kleen<ak@...ux.intel.com>
> 
> Are ext2/3 affected too? It seems to me that more or less the xattr
> management for the extN series is the same, isn't it?

Yes, they could be changed the same way.

Note however that the file system specific change is only a relatively
minor optimization (avoids the first lookup). The important one is
the cache which every file system get's automatically without changes.

-Andi
--
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/