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authorMichael Bringmann <mwb@linux.vnet.ibm.com>2018-10-09 23:12:14 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2018-10-13 14:21:25 +0300
commit65b9fdadfc4d87e2577b791fb3495cd39c93d8c0 (patch)
treee12ee844c47f127a9271e356a95b2de7725ca99d /arch/powerpc/kernel/asm-offsets.c
parent960e30029863db95ec79a71009272d4661db5991 (diff)
downloadlinux-65b9fdadfc4d87e2577b791fb3495cd39c93d8c0.tar.xz
powerpc/pseries/mobility: Extend start/stop topology update scope
The powerpc mobility code may receive RTAS requests to perform PRRN (Platform Resource Reassignment Notification) topology changes at any time, including during LPAR migration operations. In some configurations where the affinity of CPUs or memory is being changed on that platform, the PRRN requests may apply or refer to outdated information prior to the complete update of the device-tree. This patch changes the duration for which topology updates are suppressed during LPAR migrations from just the rtas_ibm_suspend_me() / 'ibm,suspend-me' call(s) to cover the entire migration_store() operation to allow all changes to the device-tree to be applied prior to accepting and applying any PRRN requests. For tracking purposes, pr_info notices are added to the functions start_topology_update() and stop_topology_update() of 'numa.c'. Signed-off-by: Michael Bringmann <mwb@linux.vnet.ibm.com> Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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