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On pseries systems, performing a partition migration can result in altering the nodes a CPU is assigned to on the destination system. For exampl, pre-migration on the source system CPUs are in node 1 and 3, post-migration on the destination system CPUs are in nodes 2 and 3. Handling the node change for a CPU can cause corruption in the slab cache if we hit a timing where a CPUs node is changed while cache_reap() is invoked. The corruption occurs because the slab cache code appears to rely on the CPU and slab cache pages being on the same node. The current dynamic updating of a CPUs node done in arch/powerpc/mm/numa.c does not prevent us from hitting this scenario. Changing the device tree property update notification handler that recognizes an affinity change for a CPU to do a full DLPAR remove and add of the CPU instead of dynamically changing its node resolves this issue. Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael W. Bringmann <mwb@linux.vnet.ibm.com> Tested-by: Michael W. Bringmann <mwb@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> |
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| .. | ||
| 8xx_mmu.c | ||
| 40x_mmu.c | ||
| 44x_mmu.c | ||
| copro_fault.c | ||
| dma-noncoherent.c | ||
| drmem.c | ||
| dump_bats.c | ||
| dump_hashpagetable.c | ||
| dump_linuxpagetables-8xx.c | ||
| dump_linuxpagetables-book3s64.c | ||
| dump_linuxpagetables-generic.c | ||
| dump_linuxpagetables.c | ||
| dump_linuxpagetables.h | ||
| dump_sr.c | ||
| fault.c | ||
| fsl_booke_mmu.c | ||
| hash64_4k.c | ||
| hash64_64k.c | ||
| hash_low_32.S | ||
| hash_native_64.c | ||
| hash_utils_64.c | ||
| highmem.c | ||
| hugepage-hash64.c | ||
| hugetlbpage-book3e.c | ||
| hugetlbpage-hash64.c | ||
| hugetlbpage-radix.c | ||
| hugetlbpage.c | ||
| init-common.c | ||
| init_32.c | ||
| init_64.c | ||
| Makefile | ||
| mem.c | ||
| mmap.c | ||
| mmu_context.c | ||
| mmu_context_book3s64.c | ||
| mmu_context_hash32.c | ||
| mmu_context_iommu.c | ||
| mmu_context_nohash.c | ||
| mmu_decl.h | ||
| numa.c | ||
| pgtable-book3e.c | ||
| pgtable-book3s64.c | ||
| pgtable-frag.c | ||
| pgtable-hash64.c | ||
| pgtable-radix.c | ||
| pgtable.c | ||
| pgtable_32.c | ||
| pgtable_64.c | ||
| pkeys.c | ||
| ppc_mmu_32.c | ||
| slb.c | ||
| slice.c | ||
| subpage-prot.c | ||
| tlb-radix.c | ||
| tlb_hash32.c | ||
| tlb_hash64.c | ||
| tlb_low_64e.S | ||
| tlb_nohash.c | ||
| tlb_nohash_low.S | ||
| vphn.c | ||
| vphn.h | ||