linux-kernel - Re: [sqlite] light weight write barriers

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Message-ID: <20121105230051.GA31623@thunk.org>
Date:	Mon, 5 Nov 2012 18:00:51 -0500
From:	Theodore Ts'o <tytso@....edu>
To:	Richard Hipp <drh@...ite.org>
Cc:	General Discussion of SQLite Database <sqlite-users@...ite.org>,
	Pavel Machek <pavel@....cz>, david@...g.hm,
	Nico Williams <nico@...ptonector.com>,
	????????? Yang Su Li <suli@...wisc.edu>,
	linux-fsdevel@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>, drh@...ci.com
Subject: Re: [sqlite] light weight write barriers

On Mon, Nov 05, 2012 at 05:37:02PM -0500, Richard Hipp wrote:
> 
> Per the docs:  "Only the superuser or a process possessing the
> CAP_SYS_RESOURCE capability can set or clear this attribute."  That
> prevents most applications that run SQLite from being able to take
> advantage of this, since most such applications lack elevated privileges.

If this feature would prove useful to sqllite, that's something we
could address.  I could image making this available to processes that
belong to a specific group that would be specified in the superblock
or as a mount option.  (We already have something like that which
allows a specific uid or gid to use the reserved space in the
superblock.)

							- Ted
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