KVM: s390: Fix fault-in code

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Fix the fault-in code so that it does not return success if a
concurrent unmap event invalidated the fault-in process between the
best-effort lockless check and the proper check with lock.

The new behaviour is to retry, like the best-effort lockless check
already did.

This prevents the fault-in handler from returning success without
having actually faulted in the requested page.

Fixes: e907ae5301 ("KVM: s390: Add helper functions for fault handling")
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Message-ID: <20260602142356.169458-7-imbrenda@linux.ibm.com>

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Claudio Imbrenda 2026-06-02 16:23:52 +02:00

parent 6af5563e82

commit 9a1dfbbd35

1 changed files with 7 additions and 7 deletions

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arch/s390/kvm/faultin.c

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