Re: [patch -mm] mm, page_alloc: extend kernelcore and movablecore for percent fix
- Date: Tue, 13 Feb 2018 17:10:03 -0800
- From: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
- Subject: Re: [patch -mm] mm, page_alloc: extend kernelcore and movablecore for percent fix
On 02/13/2018 05:00 PM, David Rientjes wrote:
> Specify that movablecore= can use a percent value.
> Remove comment about hugetlb pages not being movable per Mike.
> Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
> Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
Reviewed-by: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
And, that is for all of patch 1.
> .../admin-guide/kernel-parameters.txt | 22 +++++++++----------
> 1 file changed, 11 insertions(+), 11 deletions(-)
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -1837,10 +1837,9 @@
> ZONE_MOVABLE is used for the allocation of pages that
> may be reclaimed or moved by the page migration
> - subsystem. This means that HugeTLB pages may not be
> - allocated from this zone. Note that allocations like
> - PTEs-from-HighMem still use the HighMem zone if it
> - exists, and the Normal zone if it does not.
> + subsystem. Note that allocations like PTEs-from-HighMem
> + still use the HighMem zone if it exists, and the Normal
> + zone if it does not.
> It is possible to specify the exact amount of memory in
> the form of "nn[KMGTPE]", a percentage of total system
> @@ -2353,13 +2352,14 @@
> mousedev.yres= [MOUSE] Vertical screen resolution, used for devices
> reporting absolute coordinates, such as tablets
> - movablecore=nn[KMG] [KNL,X86,IA-64,PPC] This parameter
> - is similar to kernelcore except it specifies the
> - amount of memory used for migratable allocations.
> - If both kernelcore and movablecore is specified,
> - then kernelcore will be at *least* the specified
> - value but may be more. If movablecore on its own
> - is specified, the administrator must be careful
> + movablecore= [KNL,X86,IA-64,PPC]
> + Format: nn[KMGTPE] | nn%
> + This parameter is the complement to kernelcore=, it
> + specifies the amount of memory used for migratable
> + allocations. If both kernelcore and movablecore is
> + specified, then kernelcore will be at *least* the
> + specified value but may be more. If movablecore on its
> + own is specified, the administrator must be careful
> that the amount of memory usable for all allocations
> is not too small.
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