linux-kernel - Re: [Xen-devel] [PATCH 0/2] block/xen-blkfront: Support non-indirect with 64KB page granularity

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Message-ID: <55F3F460.7000702@oracle.com>
Date:	Sat, 12 Sep 2015 17:46:08 +0800
From:	Bob Liu <bob.liu@...cle.com>
To:	Julien Grall <julien.grall@...rix.com>
CC:	xen-devel@...ts.xenproject.org, ian.campbell@...rix.com,
	stefano.stabellini@...citrix.com, linux-kernel@...r.kernel.org,
	David Vrabel <david.vrabel@...rix.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	Roger Pau Monné 
	<roger.pau@...rix.com>
Subject: Re: [Xen-devel] [PATCH 0/2] block/xen-blkfront: Support non-indirect
 with 64KB page granularity

Hi Julien,

On 09/12/2015 03:31 AM, Julien Grall wrote:
> Hi all,
> 
> This is a follow-up on the previous discussion [1] related to guest using 64KB
> page granularity not booting with backend using non-indirect grant.
> 
> This has been successly tested on ARM64 with both 64KB and 4KB page granularity
> guests and QEMU as the backend. Indeed QEMU is not supported indirect.
> 

What's the linux kernel page granularity of the backend(dom0) in your test?

Did you test if using xen-blkback as the backend? Especially when linux kernel page
granularity of dom0 is 4kB while domU is 64KB.

Thanks,
-Bob

> For a summary of the previous discussion see patch #2.
> 
> This series is based on top of my 64KB page granularity support [2].
> 
> Comments are welcomed.
> 
> Sincerely yours,
> 
> [1] http://lists.xen.org/archives/html/xen-devel/2015-08/msg01659.html
> [2] https://lwn.net/Articles/656797/
> 
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> Cc: "Roger Pau Monné" <roger.pau@...rix.com>
> Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Cc: David Vrabel <david.vrabel@...rix.com>
> 
> Julien Grall (2):
>   block/xen-blkfront: Introduce blkif_ring_get_request
>   block/xen-blkfront: Handle non-indirect grant with 64KB pages
> 
>  drivers/block/xen-blkfront.c | 229 ++++++++++++++++++++++++++++++++++++++-----
>  1 file changed, 202 insertions(+), 27 deletions(-)
> 
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