From: Nathan Lynch <nathanl@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 0/2] more migration vs CPU hotplug fixes
Date: Thu, 18 Jul 2019 14:29:38 -0500 [thread overview]
Message-ID: <20190718192940.16103-1-nathanl@linux.ibm.com> (raw)
Despite recent fixes, userspace-initiated CPU hotplug still can
destructively race with the migration code's CPU state manipulations
on the destination. Also, since such manipulations can consist of
mass-onlining and -offlining half or more of the CPUs in the system,
take care to reschedule when needed.
Nathan Lynch (2):
powerpc/rtas: use device model APIs and serialization during LPM
powerpc/rtas: allow rescheduling while changing cpu states
arch/powerpc/kernel/rtas.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
--
2.20.1
next reply other threads:[~2019-07-18 19:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-18 19:29 Nathan Lynch [this message]
2019-07-18 19:29 ` [PATCH 1/2] powerpc/rtas: use device model APIs and serialization during LPM Nathan Lynch
2019-07-18 19:46 ` Nathan Lynch
2019-07-18 19:29 ` [PATCH 2/2] powerpc/rtas: allow rescheduling while changing cpu states Nathan Lynch
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