From: Scott Wood <scottwood@freescale.com>
To: Timur Tabi <timur@freescale.com>
Cc: "linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>
Subject: Re: [PATCH 02/14] powerpc: Add a defconfig for 'corenet' 32-bit platforms
Date: Fri, 20 May 2011 14:30:51 -0500 [thread overview]
Message-ID: <20110520143051.50ab6bf8@schlenkerla.am.freescale.net> (raw)
In-Reply-To: <4DD6C023.2080601@freescale.com>
On Fri, 20 May 2011 14:25:23 -0500
Timur Tabi <timur@freescale.com> wrote:
> Kumar Gala wrote:
> >> > This may be unnecessary. I originally set CONFIG_FORCE_MAX_ZONEORDER
> >> > to 12 because the DIU driver needs to be able to allocate a contiguous
> >> > 5MB memory block. Setting it to 13 means a max of 16MB. Is there a
> >> > reason the default isn't good enough?
>
> > Is there some concern here? CONFIG_FORCE_MAX_ZONE_ORDER was set to 13 because of hugetlbfs
>
> No, I just wanted to make sure it wasn't something that you just set for no
> particular reason.
>
> Hmm... is 16MB big enough for hugetlbfs? I presume PAGE_SIZE is still 4KB, so a
> value of 13 is just 16MB.
I think there's a separate mechanism for reserving hugetlbfs space at boot
time. 16 MiB should be enough for fully dynamic allocations, and if you
push it too high fragmentation will likely be too much of a problem.
-Scott
prev parent reply other threads:[~2011-05-20 19:31 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-20 6:09 [PATCH 01/14] powerpc: Rename e55xx_smp_defconfig to corenet64_smp_defconfig Kumar Gala
2011-05-20 6:09 ` [PATCH 02/14] powerpc: Add a defconfig for 'corenet' 32-bit platforms Kumar Gala
2011-05-20 6:09 ` [PATCH 03/14] powerpc/85xx: Add P5020DS device tree Kumar Gala
2011-05-20 6:09 ` [PATCH 04/14] powerpc/85xx: Add P3041DS " Kumar Gala
2011-05-20 6:09 ` [PATCH 05/14] powerpc/85xx: Updates to P4080DS " Kumar Gala
2011-05-20 6:09 ` [PATCH 06/14] powerpc/85xx: Cleanup PCIe support on corenet_ds boards Kumar Gala
2011-05-20 6:09 ` [PATCH 07/14] powerpc/fsl_pci: Simplify matching logic for PCI_FIXUP_HEADER Kumar Gala
2011-05-20 6:09 ` [PATCH 08/14] powerpc/85xx: Set up doorbells even with no mpic Kumar Gala
2011-05-20 6:09 ` [PATCH 09/14] powerpc/85xx: Save scratch registers to thread info instead of using SPRGs Kumar Gala
2011-05-20 6:09 ` [PATCH 10/14] powerpc/85xx: Add basic P1023RDS board support Kumar Gala
2011-05-20 6:09 ` [PATCH 11/14] powerpc/book3e: Clarify HW table walk enable/disable message Kumar Gala
2011-05-20 6:09 ` [PATCH 12/14] powerpc/pci: Move FSL fixup from 32-bit to common Kumar Gala
2011-05-20 6:09 ` [PATCH 13/14] powerpc/85xx: Add PCI support in 64-bit mode on P5020DS Kumar Gala
2011-05-20 6:09 ` [PATCH 14/14] powerpc/qe: Limit QE support to ppc32 Kumar Gala
2011-05-20 19:04 ` [PATCH 05/14] powerpc/85xx: Updates to P4080DS device tree Scott Wood
2011-05-20 19:09 ` Kumar Gala
2011-05-20 14:45 ` [PATCH 02/14] powerpc: Add a defconfig for 'corenet' 32-bit platforms Tabi Timur-B04825
2011-05-20 19:20 ` Kumar Gala
2011-05-20 19:25 ` Timur Tabi
2011-05-20 19:30 ` Scott Wood [this message]
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