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| author |   Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2019-04-17 18:33:50 +0530 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2019-04-21 23:12:39 +1000 |
| commit | 701101865f5d3e268281ce7a254eb4a97d16cbdc (patch) | |
| tree | 91f8229331ca06eb7448fe9bc22d3c69c8f2ff03 /arch/powerpc/kernel/setup-common.c | |
| parent | powerpc/mm: Move slb_addr_linit to early_init_mmu (diff) | |
| download | linux-dev-701101865f5d3e268281ce7a254eb4a97d16cbdc.tar.xz linux-dev-701101865f5d3e268281ce7a254eb4a97d16cbdc.zip | |
powerpc/mm: Reduce memory usage for mm_context_t for radix
Currently, our mm_context_t on book3s64 include all hash specific
context details like slice mask and subpage protection details. We
can skip allocating these with radix translation. This will help us to save
8K per mm_context with radix translation.
With the patch applied we have
sizeof(mm_context_t) = 136
sizeof(struct hash_mm_context) = 8288
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/setup-common.c')
| -rw-r--r-- | arch/powerpc/kernel/setup-common.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index a07de8608484..21b1ce200b22 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -947,6 +947,12 @@ void __init setup_arch(char **cmdline_p) init_mm.end_data = (unsigned long) _edata; init_mm.brk = klimit; +#ifdef CONFIG_PPC_MM_SLICES +#if defined(CONFIG_PPC_8xx) + init_mm.context.slb_addr_limit = DEFAULT_MAP_WINDOW; +#endif +#endif + #ifdef CONFIG_SPAPR_TCE_IOMMU mm_iommu_init(&init_mm); #endif |