From: Scott Wood <scottwood@freescale.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: linuxppc-dev@lists.ozlabs.org, David Gibson <dwg@au1.ibm.com>
Subject: Re: [PATCH 5/7] powerpc/mm: 64-bit: don't handle non-standard page sizes
Date: Wed, 18 May 2011 16:50:25 -0500 [thread overview]
Message-ID: <20110518165025.1deddf00@schlenkerla.am.freescale.net> (raw)
In-Reply-To: <1305754564.7481.4.camel@pasglop>
On Thu, 19 May 2011 07:36:04 +1000
Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
> On Wed, 2011-05-18 at 16:05 -0500, Scott Wood wrote:
> > I don't see where any non-standard page size will be set in the
> > kernel page tables, so don't waste time checking for it. It wouldn't
> > work with TLB0 on an FSL MMU anyway, so if there's something I missed
> > (or which is out-of-tree), it's relying on implementation-specific
> > behavior. If there's an out-of-tree need for occasional 4K mappings
> > with CONFIG_PPC_64K_PAGES, perhaps this check could only be done when
> > that is defined.
> >
> > Signed-off-by: Scott Wood <scottwood@freescale.com>
> > ---
>
> Do you use that in the hugetlbfs code ? Can you publish that code ? It's
> long overdue...
hugetlbfs entries don't get loaded by this code. It branches to a slow
path based on seeing a positive value in a pgd/pud/pmd entry.
-Scott
next prev parent reply other threads:[~2011-05-18 21:50 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-18 21:04 [PATCH 1/7] powerpc/mm: 64-bit 4k: use page-sized PMDs Scott Wood
2011-05-18 21:05 ` [PATCH 2/7] powerpc/mm: 64-bit 4k: use a PMD-based virtual page table Scott Wood
2011-05-18 21:33 ` Benjamin Herrenschmidt
2011-05-20 20:57 ` Scott Wood
2011-05-20 22:15 ` Benjamin Herrenschmidt
2011-05-23 18:54 ` Scott Wood
2011-05-23 20:51 ` Benjamin Herrenschmidt
2011-05-23 23:31 ` Scott Wood
2011-05-24 2:52 ` Benjamin Herrenschmidt
2011-05-18 21:05 ` [PATCH 3/7] powerpc/mm: 64-bit tlb miss: get PACA from memory rather than SPR Scott Wood
2011-05-18 21:05 ` [PATCH 4/7] powerpc/mm: 64-bit: Don't load PACA in normal TLB miss exceptions Scott Wood
2011-05-18 21:05 ` [PATCH 5/7] powerpc/mm: 64-bit: don't handle non-standard page sizes Scott Wood
2011-05-18 21:36 ` Benjamin Herrenschmidt
2011-05-18 21:50 ` Scott Wood [this message]
2011-05-18 21:54 ` Benjamin Herrenschmidt
2011-05-18 21:05 ` [PATCH 6/7] powerpc/mm: 64-bit: tlb handler micro-optimization Scott Wood
2011-05-18 21:37 ` Benjamin Herrenschmidt
2011-05-18 21:51 ` Scott Wood
2011-05-18 21:54 ` Benjamin Herrenschmidt
2011-05-18 22:27 ` Scott Wood
2011-05-18 21:05 ` [PATCH 7/7] powerpc/e5500: set MMU_FTR_USE_PAIRED_MAS Scott Wood
2011-05-18 21:38 ` Benjamin Herrenschmidt
2011-05-18 21:52 ` Scott Wood
2011-05-18 21:58 ` Benjamin Herrenschmidt
2011-05-18 21:32 ` [PATCH 1/7] powerpc/mm: 64-bit 4k: use page-sized PMDs Benjamin Herrenschmidt
2011-05-18 21:46 ` Scott Wood
2011-05-18 21:52 ` Benjamin Herrenschmidt
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