From: Huang Ying <ying.huang@intel.com>
To: Andi Kleen <ak@linux.intel.com>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>,
"Li, Shaohua" <shaohua.li@intel.com>,
Myron Stowe <myron.stowe@hp.com>,
"lenb@kernel.org" <lenb@kernel.org>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>
Subject: Re: [PATCH 0/7] ACPI: Memory Mapped I/O (MMIO) pre-mapping
Date: Mon, 25 Oct 2010 16:43:55 +0800 [thread overview]
Message-ID: <1287996235.2862.314.camel@yhuang-dev> (raw)
In-Reply-To: <20101025083404.GA30292@gargoyle.fritz.box>
On Mon, 2010-10-25 at 16:34 +0800, Andi Kleen wrote:
> > On ia64 (which also uses ACPI), kmap_atomic_pfn() also requires
> > a struct page. An ia64-specific version that doesn't need a struct
> > page would be trivial, but I still don't know how to make it work on
> > x86_64.
>
> Doing a struct page less kmap_atomic() shouldn't be too hard
> on x86 either.
>
> Just to avoid problems with concurrency you likely need per
> CPU mappings.
One issue is PAT management, like in general ioremap implementation
(reserve_memtype).
Best Regards,
Huang Ying
next prev parent reply other threads:[~2010-10-25 8:44 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-21 20:23 [PATCH 0/7] ACPI: Memory Mapped I/O (MMIO) pre-mapping Myron Stowe
2010-10-21 20:23 ` [PATCH 1/7] ACPI: Fix ioremap size for MMIO reads and writes Myron Stowe
2010-10-21 20:23 ` [PATCH 2/7] ACPI: Maintain a list of ACPI memory mapped I/O remappings Myron Stowe
2010-10-21 20:23 ` [PATCH 3/7] ACPI: Add interfaces for ioremapping/iounmapping ACPI registers Myron Stowe
2010-10-21 20:24 ` [PATCH 4/7] ACPI: Pre-map 'system event' related register blocks Myron Stowe
2010-10-21 20:24 ` [PATCH 5/7] ACPI: Convert simple locking to RCU based locking Myron Stowe
2010-10-21 20:24 ` [PATCH 6/7] ACPI: Page based coalescing of I/O remappings optimization Myron Stowe
2010-10-22 1:03 ` Huang Ying
2010-10-22 3:23 ` Myron Stowe
2010-10-22 5:17 ` Huang Ying
2010-10-22 16:27 ` Myron Stowe
2010-10-25 1:22 ` Huang Ying
2010-10-21 20:24 ` [PATCH 7/7] ACPI: Re-factor and remove ./drivers/acpi/atomicio.[ch] Myron Stowe
2010-10-22 2:43 ` [PATCH 0/7] ACPI: Memory Mapped I/O (MMIO) pre-mapping Shaohua Li
2010-10-22 2:57 ` Huang Ying
2010-10-22 3:16 ` Shaohua Li
2010-10-22 3:24 ` Huang Ying
2010-10-22 17:10 ` Bjorn Helgaas
2010-10-25 8:34 ` Andi Kleen
2010-10-25 8:43 ` Huang Ying [this message]
2010-10-25 9:29 ` Andi Kleen
2010-10-25 3:38 ` Len Brown
2010-10-25 15:34 ` Myron Stowe
2010-10-25 18:34 ` Andi Kleen
2010-10-28 1:53 ` Len Brown
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