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Date: Tue, 17 Jul 2012 18:09:28 +0300 From: "Michael S. Tsirkin" <mst@...hat.com> To: Asias He <asias@...hat.com> Cc: linux-kernel@...r.kernel.org, Alexander Viro <viro@...iv.linux.org.uk>, Benjamin LaHaise <bcrl@...ck.org>, James Bottomley <James.Bottomley@...senPartnership.com>, Jeff Moyer <jmoyer@...hat.com>, kvm@...r.kernel.org, linux-aio@...ck.org, linux-fsdevel@...r.kernel.org, target-devel <target-devel@...r.kernel.org>, linux-scsi <linux-scsi@...r.kernel.org>, lf-virt <virtualization@...ts.linux-foundation.org>, Stefan Hajnoczi <stefanha@...ux.vnet.ibm.com>, Zhi Yong Wu <wuzhy@...ibm.com>, Anthony Liguori <aliguori@...ux.vnet.ibm.com>, Paolo Bonzini <pbonzini@...hat.com>, Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>, Hannes Reinecke <hare@...e.de> Subject: Re: [PATCH RESEND 0/5] Add vhost-blk support On Fri, Jul 13, 2012 at 04:55:06PM +0800, Asias He wrote: > > Hi folks, > > [I am resending to fix the broken thread in the previous one.] > > This patchset adds vhost-blk support. vhost-blk is a in kernel virito-blk > device accelerator. Compared to userspace virtio-blk implementation, vhost-blk > gives about 5% to 15% performance improvement. Same thing as tcm_host comment: It seems not 100% clear whether this driver will have major userspace using it. And if not, it would be very hard to support a driver when recent userspace does not use it in the end. I think a good idea for 3.6 would be to make it depend on CONFIG_STAGING. Then we don't commit to an ABI. For this, you can add a separate Kconfig and source it from drivers/staging/Kconfig. Maybe it needs to be in a separate directory drivers/vhost/staging/Kconfig. I Cc'd the list of tcm_host in the hope that you can cooperate on this. -- MST -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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