On 2021/7/29 21:52, Matthew Wilcox wrote: > On Thu, Jul 29, 2021 at 08:57:54PM +0800, Miaohe Lin wrote: >> rtpn might be NULL in very rare case. We have better to check it before >> dereferencing it. Since memcg can live with NULL rb_tree_per_node in >> soft_limit_tree, warn this case and continue. > > Why would we need to warn? the GFP flags don't contain NOWARN, so > we already know an allocation failed. I see. Will remove it. Many thanks! > . >
