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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2017-06-01 20:05:04 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2017-06-08 20:42:56 +1000
commit92d9dfda8b547cc292af27e11e11c9eff3bb574f (patch)
tree1fa68d2a4d3a5857040e388f2d514ef25222b050 /arch/powerpc/mm/mmu_context_book3s64.c
parentcec422c11caeeccae709e9942058b6b644ce434c (diff)
powerpc/mm/4k: Limit 4k page size config to 64TB virtual address space
Supporting 512TB requires us to do a order 3 allocation for level 1 page table (pgd). This results in page allocation failures with certain workloads. For now limit 4k linux page size config to 64TB. Fixes: f6eedbba7a26 ("powerpc/mm/hash: Increase VA range to 128TB") Reported-by: Hugh Dickins <hughd@google.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/mmu_context_book3s64.c')
-rw-r--r--arch/powerpc/mm/mmu_context_book3s64.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/mm/mmu_context_book3s64.c b/arch/powerpc/mm/mmu_context_book3s64.c
index c6dca2ae78ef..a3edf813d455 100644
--- a/arch/powerpc/mm/mmu_context_book3s64.c
+++ b/arch/powerpc/mm/mmu_context_book3s64.c
@@ -99,7 +99,7 @@ static int hash__init_new_context(struct mm_struct *mm)
* mm->context.addr_limit. Default to max task size so that we copy the
* default values to paca which will help us to handle slb miss early.
*/
- mm->context.addr_limit = TASK_SIZE_128TB;
+ mm->context.addr_limit = DEFAULT_MAP_WINDOW_USER64;
/*
* The old code would re-promote on fork, we don't do that when using