Mike Rapoport <rppt@xxxxxxxxxx> writes: > > Signed-off-by: Roman Gushchin <guro@xxxxxx> > > Reviewed-by: Mike Rapoport <rppt@xxxxxxxxxxxxx> I've seen a couple of spurious triggers of the WARN_ONCE() removed by this patch. This happens on some ppc64le bare metal (powernv) server machines with CONFIG_SWIOTLB=y and crashkernel=4G, as described in a candidate patch I posted to solve this issue in a different way: https://lore.kernel.org/linuxppc-dev/20201218062103.76102-1-bauerman@xxxxxxxxxxxxx/ Since this patch solves that problem, is it possible to include it in the next feasible v5.11-rcX, with the following tag? Fixes: 8fabc623238e ("powerpc: Ensure that swiotlb buffer is allocated from low memory") This is because reverting the commit above also solves the problem on the machines where I've seen this issue. -- Thiago Jung Bauermann IBM Linux Technology Center
