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
..
boot	powerpc updates for 4.19	2018-08-17 11:32:50 -07:00
configs	powerpc updates for 4.19	2018-08-17 11:32:50 -07:00
crypto	powerpc updates for 4.19	2018-08-17 11:32:50 -07:00
include	powerpc: Avoid code patching freed init sections	2018-09-18 22:42:54 +10:00
kernel	powerpc/tm: Avoid possible userspace r1 corruption on reclaim	2018-09-25 22:51:32 +10:00
kvm	PPC KVM fixes for 4.19	2018-09-04 21:12:46 +02:00
lib	powerpc: fix csum_ipv6_magic() on little endian platforms	2018-09-20 21:12:28 +10:00
math-emu	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mm	powerpc/numa: Use associativity if VPHN hcall is successful	2018-09-25 23:05:08 +10:00
net	powerpc updates for 4.19	2018-08-17 11:32:50 -07:00
oprofile	treewide: kzalloc() -> kcalloc()	2018-06-12 16:19:22 -07:00
perf	powerpc updates for 4.19	2018-08-17 11:32:50 -07:00
platforms	powerpc/powernv/ioda2: Reduce upper limit for DMA window size (again)	2018-09-20 14:31:03 +10:00
purgatory	powerpc updates for 4.19	2018-08-17 11:32:50 -07:00
sysdev	treewide: correct "differenciate" and "instanciate" typos	2018-08-23 18:48:43 -07:00
tools	powerpc: Add a checkpatch wrapper with our preferred settings	2018-08-07 21:49:25 +10:00
xmon	Merge branch 'fixes' into next	2018-08-13 15:59:06 +10:00
Kconfig	powerpc: disable support for relative ksymtab references	2018-08-29 16:12:07 -07:00
Kconfig.debug	Kconfig: consolidate the "Kernel hacking" menu	2018-08-02 08:06:48 +09:00
Makefile	kbuild: rename LDFLAGS to KBUILD_LDFLAGS	2018-08-24 08:22:08 +09:00
Makefile.postlink	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00