linux-kernel - light weight write barriers

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Message-ID: <m2fw5mtffg.fsf_-_@firstfloor.org>
Date:	Wed, 10 Oct 2012 10:17:23 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	linux-kernel@...r.kernel.org, sqlite-users@...ite.org,
	linux-fsdevel@...r.kernel.org, drh@...ci.com
Subject: light weight write barriers

Richard Hipp writes:
>
> We would really, really love to have some kind of write-barrier that is
> lighter than fsync().  If there is some method other than fsync() for
> forcing a write-barrier on Linux that we don't know about, please enlighten
> us.

Could you list the requirements of such a light weight barrier?
i.e. what would it need to do minimally, what's different from
fsync/fdatasync ?

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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