kvm: iommu: Add cond_resched to legacy device assignment code

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When assigning devices to large memory guests (>=128GB guest
memory in the failure case) the functions to create the
IOMMU page-tables for the whole guest might run for a very
long time. On non-preemptible kernels this might cause
Soft-Lockup warnings. Fix these by adding a cond_resched()
to the mapping and unmapping loops.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Joerg Roedel 2015-01-27 11:57:19 +01:00 • committed by Paolo Bonzini

parent 82268083fa

commit 128ca093cc

1 changed files with 3 additions and 1 deletions

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arch/x86/kvm/iommu.c

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