Re: [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling forfast paths"

From: David Mosberger-Tang <>
Date: 2005-11-24 03:30:59
On 11/22/05, 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. ;-)

Not likely to be a problem.  Memory allocators generally guarantee
only 16-byte alignment (as per ia64 software conventions).

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Received on Thu Nov 24 03:31:37 2005

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