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To:     Andrew Morton <akpm@linux-foundation.org>,
        Eric Van Hensbergen <ericvh@gmail.com>,
        Ron Minnich <rminnich@sandia.gov>,
        Latchesar Ionkov <lucho@ionkov.net>,
        Greg Kurz <groug@kaod.org>, <aneesh.kumar@linux.vnet.ibm.com>
CC:     <linux-kernel@vger.kernel.org>,
        <v9fs-developer@lists.sourceforge.net>, <qemu-devel@nongnu.org>
From:   jiangyiwen <jiangyiwen@huawei.com>
Subject: [RFC] About 9pfs support "O_DIRECT + aio"?
Message-ID: <5ABDFB24.1080207@huawei.com>
Date:   Fri, 30 Mar 2018 16:53:56 +0800
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Sender: linux-kernel-owner@vger.kernel.org
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Hi everyone,

Currently, I found virtio-9p in VirtFS don't support "O_DIRECT + aio"
mode, both v9fs and qemu. So when user use "O_DIRECT + aio" mode and
increase iodepths, they can't get higher IOPS.

I want to know why v9fs don't implement this mode? And I will try to
implement this mode from now on.

Thanks,
Yiwen.