From: Andrew Morton <akpm@linux-foundation.org>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: Zhang Zhen <zhenzhang.zhang@huawei.com>,
Linux MM <linux-mm@kvack.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"linux@arm.linux.org.uk" <linux@arm.linux.org.uk>,
"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
"james.hogan@imgtec.com" <james.hogan@imgtec.com>,
"ralf@linux-mips.org" <ralf@linux-mips.org>,
"benh@kernel.crashing.org" <benh@kernel.crashing.org>,
"schwidefsky@de.ibm.com" <schwidefsky@de.ibm.com>,
"cmetcalf@ezchip.com" <cmetcalf@ezchip.com>,
David Rientjes <rientjes@google.com>,
"James.Yang@freescale.com" <James.Yang@freescale.com>,
"aneesh.kumar@linux.vnet.ibm.com"
<aneesh.kumar@linux.vnet.ibm.com>
Subject: Re: [PATCH] mm/hugetlb: reduce arch dependent code about huge_pmd_unshare
Date: Thu, 23 Apr 2015 15:41:57 -0700 [thread overview]
Message-ID: <20150423154157.837a378188ef0a703813f206@linux-foundation.org> (raw)
In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F32A6478B@ORSMSX114.amr.corp.intel.com>
On Thu, 23 Apr 2015 22:26:18 +0000 "Luck, Tony" <tony.luck@intel.com> wrote:
> > Memory fails me. Why do some architectures (arm, arm64, x86_64) want
> > huge_pmd_[un]share() while other architectures (ia64, tile, mips,
> > powerpc, metag, sh, s390) do not?
>
> Potentially laziness/ignorance-of-feature? It looks like this feature started on x86_64 and then spread
> to arm*.
Yes. In 3212b535f200c85b5a6 Steve Capper (ARM person) hoisted the code
out of x86 into generic, then made arm use it.
We're not (I'm not) very good about letting arch people know about such
things. I wonder how to fix that; does linux-arch work?
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next prev parent reply other threads:[~2015-04-23 22:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1428996566-86763-1-git-send-email-zhenzhang.zhang@huawei.com>
2015-04-14 7:35 ` Zhang Zhen
2015-04-23 22:11 ` Andrew Morton
2015-04-23 22:26 ` Luck, Tony
2015-04-23 22:41 ` Andrew Morton [this message]
2015-04-24 15:46 ` Steve Capper
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