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Date: Thu, 5 Jan 2017 12:17:59 +0100
From: Christoph Hellwig <hch@lst.de>
To: =?utf-8?B?546L6YeR5rWm?= <jinpuwang@gmail.com>
Cc: Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
	mst@redhat.com, jasowang@redhat.com, linux-block@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] virtio_blk: avoid DMA to stack for the sense buffer
Message-ID: <20170105111759.GA17051@lst.de>
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On Thu, Jan 05, 2017 at 11:37:46AM +0100, 王金浦 wrote:
> Thanks, so it's only relevant to kernel > 4.9, as  CONFIG_VMAP_STACK
> only introduced in 4.9 kernel.

kernel >= 4.9, but otherwise, yes.