s390/uv: add destroy page call

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We don't need to export pages if we destroy the VM configuration
afterwards anyway. Instead we can destroy the page which will zero it
and then make it accessible to the host.

Destroying is about twice as fast as the export.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Link: https://lore.kernel.org/kvm/20200907124700.10374-2-frankja@linux.ibm.com/
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

...

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Janosch Frank 2020-09-07 08:46:59 -04:00 • committed by Vasily Gorbik

parent e670e64af1

commit 1a80b54d1c

3 changed files with 28 additions and 1 deletions

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7

arch/s390/include/asm/uv.h

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20

arch/s390/kernel/uv.c

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2

arch/s390/mm/gmap.c

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