From: "Jan Beulich" <JBeulich@suse.com>
To: Juergen Gross <JGross@suse.com>
Cc: anthony.perard@citrix.com,
xen-devel <xen-devel@lists.xenproject.org>,
sstabellini@kernel.org, qemu-devel@nongnu.org, kraxel@redhat.com
Subject: Re: [PATCH v2] xen: fix qdisk BLKIF_OP_DISCARD for 32/64 word size mix
Date: Fri, 17 Jun 2016 03:26:21 -0600 [thread overview]
Message-ID: <5763DE5D02000078000F5FF8__8663.33978851817$1466155651$gmane$org@prv-mh.provo.novell.com> (raw)
In-Reply-To: <1466154874-6218-1-git-send-email-jgross@suse.com>
>>> On 17.06.16 at 11:14, <JGross@suse.com> wrote:
> In case the word size of the domU and qemu running the qdisk backend
> differ BLKIF_OP_DISCARD will not work reliably, as the request
> structure in the ring have different layouts for different word size.
>
> Correct this by copying the request structure in case of different
> word size element by element in the BLKIF_OP_DISCARD case, too.
>
> The easiest way to achieve this is to resync hw/block/xen_blkif.h with
> its original source from the Linux kernel.
>
> Signed-off-by: Juergen Gross <jgross@suse.com>
> ---
> V2: resync with Linux kernel version of hw/block/xen_blkif.h as
> suggested by Paul Durrant
Oh, I didn't realize he suggested syncing with the Linux variant.
Why not with the canonical one? I have to admit that I particularly
dislike Linux'es strange union-izng, mainly because of it requiring
this myriad of __attribute__((__packed__)).
Jan
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next prev parent reply other threads:[~2016-06-17 9:26 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-17 9:14 [PATCH v2] xen: fix qdisk BLKIF_OP_DISCARD for 32/64 word size mix Juergen Gross
2016-06-17 9:26 ` Jan Beulich [this message]
[not found] ` <5763DE5D02000078000F5FF8@suse.com>
2016-06-17 9:31 ` Juergen Gross
[not found] ` <5763C36E.4060002@suse.com>
2016-06-17 9:35 ` Paul Durrant
2016-06-17 9:41 ` Jan Beulich
[not found] ` <5763DE5D02000078000F5FF8@prv-mh.provo.novell.com>
2016-06-17 9:37 ` Paul Durrant
[not found] ` <ed257f0803b040e9be43cc518fc83252@AMSPEX02CL03.citrite.net>
2016-06-17 9:45 ` Juergen Gross
[not found] ` <5763C6CA.4090705@suse.com>
2016-06-17 9:50 ` Paul Durrant
[not found] ` <e5a9691e4d08428683ecb12991410a9c@AMSPEX02CL03.citrite.net>
2016-06-17 10:08 ` Juergen Gross
[not found] ` <5763CC05.3030008@suse.com>
2016-06-17 10:15 ` Paul Durrant
2016-06-17 10:40 ` Juergen Gross
2016-06-17 10:53 ` Paul Durrant
[not found] ` <8b53bcd700444ee883e0450c51ca7cb9@AMSPEX02CL03.citrite.net>
2016-06-17 16:10 ` Stefano Stabellini
2016-06-20 6:02 ` Juergen Gross
[not found] ` <57678703.4040408@suse.com>
2016-06-20 9:40 ` Stefano Stabellini
2016-06-17 10:20 ` Jan Beulich
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