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xen-devel
Re: [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling forfa
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To: |
"Tian, Kevin" <kevin.tian@xxxxxxxxx> |
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Subject: |
Re: [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling forfast paths" |
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From: |
Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
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Date: |
Wed, 23 Nov 2005 08:54:46 +0000 |
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Cc: |
"Luck, Tony" <tony.luck@xxxxxxxxx>, linux-ia64@xxxxxxxxxxxxxxx, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, Tony Breeds <tony@xxxxxxxxxxxxxxxxxx>, djm@xxxxxxxxxxxxxxx, Xen Mailing List <xen-devel@xxxxxxxxxxxxxxxxxxx>, David Mosberger-Tang <David.Mosberger@xxxxxxx> |
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Wed, 23 Nov 2005 09:14:02 +0000 |
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On 23 Nov 2005, at 02:58, Tian, Kevin wrote:
Now I think even '16' can't cover all cases. It's possible for a user
defined structure with .align directive to force by '32' or larger,
and then allocator happens to have similar check upon SMP_CACHE_BYTES
like case in this thread. Because both structure definition and
allocator may have no idea about IA64 trick of saving space for UP.
Max alignment of any C style only solves the natural alignment case,
but not above forced one. We can just give its real assumption to
SMP_CACHE_BYTES - cache line size. ;-)
It's not hard to support arbitrary alignment, at the cost of burning
some space. We should probably do that.
-- Keir
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- RE: [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling forfast paths", Tian, Kevin
- RE: [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling forfast paths", Tian, Kevin
- RE: [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling forfast paths", Tian, Kevin
- RE: [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling forfast paths", Magenheimer, Dan (HP Labs Fort Collins)
- RE: [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling forfast paths", Luck, Tony
- RE: [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling forfast paths", Luck, Tony
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