From: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
To: "Tian, Kevin" <kevin.tian@intel.com>
Cc: "Luck, Tony" <tony.luck@intel.com>,
linux-ia64@vger.kernel.org, Rusty Russell <rusty@rustcorp.com.au>,
Tony Breeds <tony@bakeyournoodle.com>,
djm@kirby.fc.hp.com,
Xen Mailing List <xen-devel@lists.xensource.com>,
David Mosberger-Tang <David.Mosberger@acm.org>
Subject: Re: [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling forfast paths"
Date: Wed, 23 Nov 2005 08:54:46 +0000 [thread overview]
Message-ID: <a2a560aa9aa53494165df9ccdb7d8d4e@cl.cam.ac.uk> (raw)
In-Reply-To: <571ACEFD467F7749BC50E0A98C17CDD802C069E3@pdsmsx403>
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
next prev parent reply other threads:[~2005-11-23 8:54 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1132548798.1478.7.camel@localhost.localdomain>
2005-11-22 4:44 ` [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling forfast paths" Tian, Kevin
2005-11-22 16:11 ` Luck, Tony
2005-11-22 19:34 ` David Mosberger-Tang
2005-11-23 2:52 ` Tian, Kevin
2005-11-23 2:58 ` Tian, Kevin
2005-11-23 8:54 ` Keir Fraser [this message]
2005-11-23 16:30 ` David Mosberger-Tang
2005-11-23 15:07 ` Luck, Tony
2005-11-23 15:37 ` Keir Fraser
2005-11-23 23:22 ` [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling Rusty Russell
2005-11-23 17:49 ` [Xen-devel] __ia64__ ifdef in xmalloc.c: "Fix ar.unat handling forfast paths" Magenheimer, Dan (HP Labs Fort Collins)
2005-11-24 7:01 ` Luck, Tony
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