From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
Subject: Re: [PATCH 0/5] Indirect memory registration feature
Date: Tue, 9 Jun 2015 00:41:54 -0700
Message-ID: <20150609074154.GA5223@infradead.org>
References: <1433769339-949-1-git-send-email-sagig@mellanox.com>
 <20150608132254.GA14773@infradead.org>
 <55759B0B.8050805@mellanox.com>
 <20150608135151.GA14021@infradead.org>
 <5575A9C7.7000409@dev.mellanox.co.il>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Return-path: <linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Content-Disposition: inline
In-Reply-To: <5575A9C7.7000409-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
To: Sagi Grimberg <sagig-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
Cc: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>, Doug Ledford <dledford-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Or Gerlitz <ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>, Eli Cohen <eli-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>, Oren Duer <oren-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
List-Id: linux-rdma@vger.kernel.org

On Mon, Jun 08, 2015 at 05:42:15PM +0300, Sagi Grimberg wrote:
> I think O_DIRECT allows user-space to generate vectored SG lists that
> are not aligned as well.

Indeed if you do sub-page size direct I/O.  Although SG_GAPS helps with
that.
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html