Srikar Dronamraju 2483ef056f powerpc/numa: Use associativity if VPHN hcall is successful ... Currently associativity is used to lookup node-id even if the preceding VPHN hcall failed. However this can cause CPU to be made part of the wrong node, (most likely to be node 0). This is because VPHN is not enabled on KVM guests. With 2ea6263 ("powerpc/topology: Get topology for shared processors at boot"), associativity is used to set to the wrong node. Hence KVM guest topology is broken. For example : A 4 node KVM guest before would have reported. [root@localhost ~]# numactl -H available: 4 nodes (0-3) node 0 cpus: 0 1 2 3 node 0 size: 1746 MB node 0 free: 1604 MB node 1 cpus: 4 5 6 7 node 1 size: 2044 MB node 1 free: 1765 MB node 2 cpus: 8 9 10 11 node 2 size: 2044 MB node 2 free: 1837 MB node 3 cpus: 12 13 14 15 node 3 size: 2044 MB node 3 free: 1903 MB node distances: node 0 1 2 3 0: 10 40 40 40 1: 40 10 40 40 2: 40 40 10 40 3: 40 40 40 10 Would now report: [root@localhost ~]# numactl -H available: 4 nodes (0-3) node 0 cpus: 0 2 3 4 5 6 7 8 9 10 11 12 13 14 15 node 0 size: 1746 MB node 0 free: 1244 MB node 1 cpus: node 1 size: 2044 MB node 1 free: 2032 MB node 2 cpus: 1 node 2 size: 2044 MB node 2 free: 2028 MB node 3 cpus: node 3 size: 2044 MB node 3 free: 2032 MB node distances: node 0 1 2 3 0: 10 40 40 40 1: 40 10 40 40 2: 40 40 10 40 3: 40 40 40 10 Fix this by skipping associativity lookup if the VPHN hcall failed. Fixes: 2ea6263068 ("powerpc/topology: Get topology for shared processors at boot") Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2018-09-25 23:05:08 +10:00
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alpha	Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2018-08-24 09:25:39 -07:00
arc	ARC: don't check for HIGHMEM pages in arch_dma_alloc	2018-09-04 13:21:38 -07:00
arm	Fixes for KVM/ARM for Linux v4.19 v2:	2018-09-07 18:38:25 +02:00
arm64	KVM fixes for 4.19-rc3	2018-09-08 15:52:45 -07:00
c6x	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
h8300	Kbuild updates for v4.19 (2nd)	2018-08-25 13:40:38 -07:00
hexagon	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
ia64	ia64: Fix allnoconfig section mismatch for ioc_init/ioc_iommu_info	2018-08-22 14:12:47 -07:00
m68k	m68k: fix early memory reservation for ColdFire MMU systems	2018-09-03 10:19:36 +10:00
microblaze	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
mips	KVM fixes for 4.19-rc3	2018-09-08 15:52:45 -07:00
nds32	nds32: linker script: GCOV kernel may refers data in __exit	2018-09-05 10:16:26 +08:00
nios2	nios2: kconfig: remove duplicate DEBUG_STACK_USAGE symbol defintions	2018-08-27 09:47:20 +08:00
openrisc	OpenRISC updates for 4.19	2018-08-23 14:09:37 -07:00
parisc	Merge branch 'parisc-4.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux	2018-08-22 14:06:37 -07:00
powerpc	powerpc/numa: Use associativity if VPHN hcall is successful	2018-09-25 23:05:08 +10:00
riscv	RISC-V: Use a less ugly workaround for unused variable warnings	2018-08-28 12:58:36 -07:00
s390	KVM: s390: Properly lock mm context allow_gmap_hpage_1m setting	2018-09-04 11:40:26 +02:00
sh	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
sparc	sparc: set a default 32-bit dma mask for OF devices	2018-09-02 10:02:04 +02:00
um	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
unicore32	mm: convert return type of handle_mm_fault() caller to vm_fault_t	2018-08-17 16:20:28 -07:00
x86	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-09-09 07:05:15 -07:00
xtensa	Kbuild updates for v4.19 (2nd)	2018-08-25 13:40:38 -07:00
.gitignore	…
Kconfig	Merge branch 'tlb-fixes'	2018-08-23 14:55:01 -07:00