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Re: [Xen-devel] 32/64-bit hypercall interface

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] 32/64-bit hypercall interface
From: Hollis Blanchard <hollisb@xxxxxxxxxx>
Date: Fri, 30 Sep 2005 15:28:05 -0500
Cc: Jimi Xenidis <jimix@xxxxxxxxxxxxxx>, Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>, Andrei Petrov <andrei@xxxxxxxxxxxxx>, Ronald G Minnich <rminnich@xxxxxxxx>
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On Friday 30 September 2005 15:05, Ronald G Minnich wrote:
> Jimi Xenidis wrote:
> >  KF> When we previously had this, by defining packed structs, there were
> >  KF> plenty of screams that it wasn't ANSI compliant, and that
> > performance KF> sucks on some architectures.
> >
> > Tou use a research term, "thats just ka-ka" :)
> > Packed in no way solves the problem of selecting the appropriate types.
>
> no, it's not ka ka at all. I had huge troubles with plan 9 c and the way
> that the linux structs were packed via the use of gcc struct packing. I
> am really glad packed went away.

I think you misunderstand: Jimi is also glad. Read again: the packed GCC 
attribute does not solve the problem.

-- 
Hollis Blanchard
IBM Linux Technology Center

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