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d1331a4469
Treat an -EAGAIN return from GUP the same as -EINTR and immediately report to the caller that a signal is pending. GUP only returns -EAGAIN if the _initial_ mmap_read_lock_killable() fails, which in turn onnly fails if a signal is pending Note, rwsem_down_read_slowpath() actually returns -EINTR, so GUP is really just making life harder than it needs to be. And the call to mmap_read_lock_killable() in the retry path returns its -errno verbatim, i.e. GUP (and thus KVM) is already handling locking failure this way, but only some of the time. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-ID: <20241010182427.1434605-15-seanjc@google.com> |
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