  We propose the holographic interpretation of the 1-point conformal block on a
torus in the semiclassical regime. To this end we consider the linearized
version of the block and find its coefficients by means of the perturbation
procedure around natural seed configuration corresponding to the zero-point
block. From the AdS/CFT perspective the linearized block is given by the
geodesic length of the tadpole graph embedded into the thermal AdS plus the
holomorphic part of the thermal AdS action.
