From: Zachary Amsden <zach@vmware.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Chris Wright <chrisw@sous-sol.org>,
Virtualization Mailing List <virtualization@lists.osdl.org>
Subject: Re: pgd_alloc and [cd]tors
Date: Thu, 16 Nov 2006 21:14:52 -0800 [thread overview]
Message-ID: <455D454C.9040808@vmware.com> (raw)
In-Reply-To: <455D42C7.4070203@goop.org>
Jeremy Fitzhardinge wrote:
> Zachary Amsden wrote:
>
>> Actually, vmalloc mapping replication is not quite straightforward -
>> you have to replicate it under locks and track all pgds using pgd_list
>> if you support large pages.
>>
>
> But that machinery already exists. It would continue to work under PAE
> wouldn't it?
>
No, it doesn't exist under PAE, since PAE uses a common pgd[3] therefore
the init_mm pgd never needs changing for large page / split page PD
transitions. The code is there for non-PAE, but compiled out of the PAE
version.
Zach
next prev parent reply other threads:[~2006-11-17 5:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-17 0:50 pgd_alloc and [cd]tors Jeremy Fitzhardinge
2006-11-17 1:28 ` Chris Wright
2006-11-17 2:10 ` Zachary Amsden
2006-11-17 5:04 ` Jeremy Fitzhardinge
2006-11-17 5:14 ` Zachary Amsden [this message]
2006-11-17 7:14 ` Jeremy Fitzhardinge
2006-11-17 8:33 ` Gerd Hoffmann
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