From owner-freebsd-stable@FreeBSD.ORG Wed Sep 3 11:02:59 2008 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 946DF1065674 for ; Wed, 3 Sep 2008 11:02:59 +0000 (UTC) (envelope-from sjt.kar@gmail.com) Received: from yx-out-2324.google.com (yx-out-2324.google.com [74.125.44.29]) by mx1.freebsd.org (Postfix) with ESMTP id 4859D8FC1B for ; Wed, 3 Sep 2008 11:02:59 +0000 (UTC) (envelope-from sjt.kar@gmail.com) Received: by yx-out-2324.google.com with SMTP id 8so1516523yxb.13 for ; Wed, 03 Sep 2008 04:02:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=ZOLfQvUOrK+ySx4ctbrBcTWzofkF9NiFnEkZPmjhir8=; b=mYjuiX1VOPoDyRa7UfYwCHDgkmGMNtuXV38U1kdmMOraS0odEo/HbmEVy6z6oCWCMr 8atCBKhyNmYDaP3sbb3445nmDOTXdt/QRfgKZl+F+E5jPmfCEBYEM1ukHHaJsS/8sJaO b+uPe/eCsNjNDkvgt6RHU3aIT6E4eiLMS7GQY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=iUmO7U6Ev9GBr3W9sj2+xWqyUASJWwF/eVcO7GM6/wQDFauJa9RxC7hqpRBG2jUoHD vAwhj+QYkEa3zVz+olPfHNgnQkLpjb6ZgpM6P/S5drWDlqq3UzdVMHrUfyFIqlo3Sfzc mLlS045d/Re/dv8mKDpAAIUW1w/EXJPz3AMGg= Received: by 10.150.50.1 with SMTP id x1mr7048957ybx.63.1220438039312; Wed, 03 Sep 2008 03:33:59 -0700 (PDT) Received: by 10.151.78.4 with HTTP; Wed, 3 Sep 2008 03:33:59 -0700 (PDT) Message-ID: <921ca19c0809030333u6accf415l80ec5bfb4a984ce1@mail.gmail.com> Date: Wed, 3 Sep 2008 16:03:59 +0530 From: "Sujit Karataparambil" To: freebsd-stable@freebsd.org In-Reply-To: <20080903095352.GA62541@rambler-co.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080903095352.GA62541@rambler-co.ru> Subject: Re: vfs.ffs.rawreadahead X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 03 Sep 2008 11:03:00 -0000 The VFS was designed to be Object abtraction of the Berkeley Fast File System. This has been since an terminology with journalling filesystem to have functionality to added on request. Thanks, Sujit On 9/3/08, Igor Sysoev wrote: > Hi, > > could anyone tell what does vfs.ffs.rawreadahead enable ? > As I understand it's used in DIRECTIO code that allows read data > directly to an userland buffer bypassing the buffer cache. > What I can not understand where the read ahead data can be placed in ? > > > -- > Igor Sysoev > http://sysoev.ru/en/ > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" > -- --linux(2.4/2.6),bsd(4.5.x+),solaris(2.5+)