| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] Add dm-userspace to the Xen kernel |
| From: | Bastian Blank <bastian@xxxxxxxxxxxx> |
| Date: | 2006年6月10日 22:40:43 +0200 |
| Delivery-date: | 2006年6月10日 13:50:16 -0700 |
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On Fri, Jun 09, 2006 at 02:08:15PM -0700, Dan Smith wrote:
> ++/*
> ++ * This is the message that is passed back and forth between the
> ++ * kernel and the user application
> ++ */
> ++struct dmu_write {
> ++ uint32_t id;
> ++ uint32_t type; /* Type of request */
> ++ uint32_t flags; /* Flags */
> ++
> ++ uint64_t org_block; /* Block that was accessed */
> ++ uint64_t new_block; /* The new block it should go to */
> ++ int64_t offset; /* Sector offset of the block, if needed */
> ++
> ++ uint32_t src_maj; /* The source device for copying */
> ++ uint32_t src_min;
> ++
> ++ uint32_t dest_maj; /* Destination device for copying, and */
> ++ uint32_t dest_min; /* for the block access */
> ++
> ++};
> ++
> ++#endif
Any reason why
1. this struct differs from the old patches published on dm-devel and
lkml?
2. Why do you use a construct which gives different allignment on i386
and x86_64? (i386 alligns 64bit ints on 32bit, x86_64 on 64bit
Bastian
--
A woman should have compassion.
-- Kirk, "Catspaw", stardate 3018.2
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