Commit cc726886 authored Nov 11, 2022 by Claudio Imbrenda Committed by Janosch Frank Nov 23, 2022

KVM: s390: pv: module parameter to fence asynchronous destroy



Add the module parameter "async_destroy", to allow the asynchronous
destroy mechanism to be switched off. This might be useful for
debugging purposes.

The parameter is enabled by default since the feature is opt-in anyway.

Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Reviewed-by: Nico Boehr <nrb@linux.ibm.com>
Link: https://lore.kernel.org/r/20221111170632.77622-7-imbrenda@linux.ibm.com


Message-Id: <20221111170632.77622-7-imbrenda@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>

parent f7866f58

arch/s390/kvm/kvm-s390.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -209,7 +209,13 @@ unsigned int diag9c_forwarding_hz;
		module_param(diag9c_forwarding_hz, uint, 0644);
		MODULE_PARM_DESC(diag9c_forwarding_hz, "Maximum diag9c forwarding per second, 0 to turn off");

		static int async_destroy;
		/*
		* allow asynchronous deinit for protected guests; enable by default since
		* the feature is opt-in anyway
		*/
		static int async_destroy = 1;
		module_param(async_destroy, int, 0444);
		MODULE_PARM_DESC(async_destroy, "Asynchronous destroy for protected guests");

		/*
		* For now we handle at most 16 double words as this is what the s390 base