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From: jiangyiwen <jiangyiwen@huawei.com>
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>
Subject: [RFC] About 9pfs support "O_DIRECT + aio"?
Date: Fri, 30 Mar 2018 16:53:56 +0800	[thread overview]
Message-ID: <5ABDFB24.1080207@huawei.com> (raw)

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.

WARNING: multiple messages have this Message-ID (diff)
From: jiangyiwen <jiangyiwen@huawei.com>
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
Subject: [Qemu-devel] [RFC] About 9pfs support "O_DIRECT + aio"?
Date: Fri, 30 Mar 2018 16:53:56 +0800	[thread overview]
Message-ID: <5ABDFB24.1080207@huawei.com> (raw)

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.

             reply	other threads:[~2018-03-30  8:55 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-30  8:53 jiangyiwen [this message]
2018-03-30  8:53 ` [Qemu-devel] [RFC] About 9pfs support "O_DIRECT + aio"? jiangyiwen
2018-04-02  2:45 ` Paolo Bonzini

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