From: John David Anglin <dave.anglin@bell.net>
To: Helge Deller <deller@gmx.de>
Cc: linux-parisc@vger.kernel.org,
James Bottomley <James.Bottomley@HansenPartnership.com>
Subject: Re: [PATCH 1/3] parisc: Disable huge pages on Mako machines
Date: Mon, 7 Dec 2015 21:03:21 -0500 [thread overview]
Message-ID: <E384F76A-0424-4237-8624-3761A2EA68F0@bell.net> (raw)
In-Reply-To: <5665F7CE.3010209@gmx.de>
On 2015-12-07, at 4:19 PM, Helge Deller wrote:
>> Where do the non equivalent addresses come from?
>
> I think the main problem is the gateway page.
> It's mapped at address 0 into userspace, but needs to jump into kernel space too.
> This somehow breaks the huge page mapping.
With latest debian kernel, I see:
000000004015d000 <linux_gateway_page>:
...
000000004015d0b0 <lws_entry>:
Possibly, this needs to be aligned to huge page boundary.
Dave
--
John David Anglin dave.anglin@bell.net
prev parent reply other threads:[~2015-12-08 2:03 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-06 20:43 [PATCH 1/3] parisc: Disable huge pages on Mako machines Helge Deller
2015-12-06 20:43 ` [PATCH 2/3] parisc: Disable tlb flush optimization with huge pages Helge Deller
2015-12-06 20:43 ` [PATCH 3/3] parisc: protect huge pte changes with spinlocks Helge Deller
2015-12-07 15:13 ` [PATCH 1/3] parisc: Disable huge pages on Mako machines John David Anglin
2015-12-07 21:19 ` Helge Deller
2015-12-08 2:03 ` John David Anglin [this message]
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