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powerpc/mm/hash: Store addr_limit in PACA

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We optmize the slice page size array copy to paca by copying only the
range based on addr_limit. This will require us to not look at page size
array beyond addr_limit in PACA on slb fault. To enable that copy task
size to paca which will be used during slb fault.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
[mpe: Rename from task_size to addr_limit, consolidate #ifdefs]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V
2017-03-22 09:06:59 +05:30
committed by Michael Ellerman
parent 957b778a16
commit bb1832217a
4 changed files with 10 additions and 1 deletions
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arch/powerpc/kernel/paca.c
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@@ -254,6 +254,7 @@ void copy_mm_to_paca(struct mm_struct *mm)
get_paca()->mm_ctx_id = context->id;
#ifdef CONFIG_PPC_MM_SLICES
VM_BUG_ON(!mm->context.addr_limit);
get_paca()->addr_limit = mm->context.addr_limit;
get_paca()->mm_ctx_low_slices_psize = context->low_slices_psize;
memcpy(&get_paca()->mm_ctx_high_slices_psize,
&context->high_slices_psize, TASK_SLICE_ARRAY_SZ(mm));