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: <20080519002838.GB8335@mit.edu>
Date:	Sun, 18 May 2008 20:28:38 -0400
From:	Theodore Tso <tytso@....EDU>
To:	Eric Sandeen <sandeen@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 0/4] (RESEND) ext3[34] barrier changes

On Fri, May 16, 2008 at 11:03:15PM +0100, Jamie Lokier wrote:
> The MacOS X folks decided that speed is most important for fsync().
> fsync() does not guarantee commit to platter.  *But* they added an
> fcntl() for applications to request a commit to platter, which SQLite
> at least uses.  I don't know if MacOS X uses barriers for filesystem
> operations.

Out of curiosity, exactly *what* semantics did MacOS X give fsync(),
then?  Did it simply start the process of staging writes to disk, but
not wait for the writes to hit the platter before returning?  That's
basically the equivalent of ext3's barrier=0.

							- 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

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ