From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Ilya Yanok <yanok@emcraft.com>
Cc: linuxppc-dev@ozlabs.org, pvr@emcraft.com, dzu@denx.de, wd@denx.de
Subject: Re: [RFC PATCH] Support for big page sizes on 44x (Updated)
Date: Tue, 11 Nov 2008 13:22:03 +1100 [thread overview]
Message-ID: <1226370123.7530.61.camel@pasglop> (raw)
In-Reply-To: <1226369868.7530.60.camel@pasglop>
> Well, the main thing is the implementation of kmap and kmap_atomic.
>
> They both basically assumes that all the reserved PTEs for kmap and
> kmap_atomic are in a single PTE page since it uses a simple addition
> (substraction for _atomic really but heh, that's about the same).
>
> Note that PKMAP (kmap) and FIXMAP (kmap_atomic) can be in two different
> PTE pages. But it's important that the whole PKMAP is entirely contained
> within a PTE page. It doesn't have to -start- on a PTE page boundary
> though.
Also note that if you end up with PKMAP and FIXMAP on two different PTE
pages, make sure they are both instanciated at boot time.
Ben.
next prev parent reply other threads:[~2008-11-11 2:22 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-16 2:22 [RFC PATCH] Support for big page sizes on 44x (Updated) Ilya Yanok
2008-10-16 2:22 ` [PATCH 1/2] powerpc: add 16K/64K pages support for the 44x PPC32 architectures Ilya Yanok
2008-10-17 15:54 ` prodyut hazarika
2008-10-18 12:58 ` Josh Boyer
2008-10-18 20:36 ` prodyut hazarika
2008-10-22 14:28 ` Christian Ehrhardt
2008-10-22 17:54 ` Christian Ehrhardt
2008-10-31 23:23 ` Hollis Blanchard
2008-11-01 11:30 ` Josh Boyer
2008-11-01 21:55 ` Benjamin Herrenschmidt
2008-11-02 13:41 ` Josh Boyer
2008-11-02 21:33 ` Benjamin Herrenschmidt
2008-11-03 0:33 ` Josh Boyer
2008-11-03 0:43 ` Benjamin Herrenschmidt
2008-11-03 11:26 ` Josh Boyer
2008-11-03 20:17 ` Benjamin Herrenschmidt
2008-11-03 19:55 ` Hollis Blanchard
2008-11-03 20:00 ` Josh Boyer
2008-11-05 17:33 ` Hollis Blanchard
2008-11-06 1:48 ` David Gibson
2008-11-11 13:19 ` Josh Boyer
2008-11-11 15:00 ` Hollis Blanchard
2008-11-10 15:09 ` [1/2] " Milton Miller
2008-11-10 16:50 ` Ilya Yanok
2008-10-16 2:22 ` [PATCH 2/2] powerpc: support for 256K pages on PPC 44x Ilya Yanok
2008-11-10 15:09 ` [2/2] " Milton Miller
2008-11-10 16:24 ` Ilya Yanok
2008-11-11 14:59 ` Milton Miller
2008-11-14 4:32 ` Re[2]: " Yuri Tikhonov
2008-11-14 15:41 ` Milton Miller
2008-11-27 0:30 ` Re[4]: " Yuri Tikhonov
2008-11-11 2:17 ` [RFC PATCH] Support for big page sizes on 44x (Updated) Benjamin Herrenschmidt
2008-11-11 2:22 ` Benjamin Herrenschmidt [this message]
2008-11-24 20:32 ` Hollis Blanchard
2008-11-24 23:06 ` Wolfgang Denk
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