linux-kernel - Re: [PATCH] virtio_blk: avoid DMA to stack for the sense buffer

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Message-ID: <20170105111759.GA17051@lst.de>
Date:   Thu, 5 Jan 2017 12:17:59 +0100
From:   Christoph Hellwig <hch@....de>
To:     王金浦 <jinpuwang@...il.com>
Cc:     Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>,
        mst@...hat.com, jasowang@...hat.com, linux-block@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] virtio_blk: avoid DMA to stack for the sense buffer

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.