From: Rik van Riel <riel@redhat.com>
To: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Gleb Natapov <gleb@redhat.com>, Ingo Molnar <mingo@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: [RFCv3][PATCH 1/3] create slow_virt_to_phys()
Date: Tue, 15 Jan 2013 12:04:49 -0500 [thread overview]
Message-ID: <50F58C31.3020105@redhat.com> (raw)
In-Reply-To: <20130109185904.DD641DCE@kernel.stglabs.ibm.com>
On 01/09/2013 01:59 PM, Dave Hansen wrote:
> Broadening the cc list here a bit... This bug is still present,
> and I still need these patches to boot 32-bit NUMA kernels. They
> might be obscure, but if we don't care about them any more, perhaps
> we should go remove the NUMA remapping code instead of this.
>
> --
>
> This is necessary because __pa() does not work on some kinds of
> memory, like vmalloc() or the alloc_remap() areas on 32-bit
> NUMA systems. We have some functions to do conversions _like_
> this in the vmalloc() code (like vmalloc_to_page()), but they
> do not work on sizes other than 4k pages. We would potentially
> need to be able to handle all the page sizes that we use for
> the kernel linear mapping (4k, 2M, 1G).
Acked-by: Rik van Riel <riel@redhat.com>
--
All rights reversed
next prev parent reply other threads:[~2013-01-15 17:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-09 18:59 [RFCv3][PATCH 1/3] create slow_virt_to_phys() Dave Hansen
2013-01-09 18:59 ` [RFCv3][PATCH 2/3] fix kvm's use of __pa() on percpu areas Dave Hansen
2013-01-15 18:38 ` Rik van Riel
2013-01-09 18:59 ` [RFCv3][PATCH 3/3] make DEBUG_VIRTUAL work earlier in boot Dave Hansen
2013-01-15 17:04 ` Rik van Riel [this message]
2013-01-15 19:46 ` [RFCv3][PATCH 1/3] create slow_virt_to_phys() H. Peter Anvin
2013-01-15 22:50 ` Dave Hansen
2013-01-15 23:46 ` H. Peter Anvin
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