On Mon, 14 Oct 2024 22:12:11 +0000 Wei Xu <weixugc@xxxxxxxxxx> wrote: > lru_gen_shrink_node() unconditionally clears kswapd_failures, which > can prevent kswapd from sleeping and cause 100% kswapd cpu usage even > when kswapd repeatedly fails to make progress in reclaim. > > Only clear kswap_failures in lru_gen_shrink_node() if reclaim makes > some progress, similar to shrink_node(). That sounds bad. What triggers this? Can you suggest why it has just bee discovered, after 1.5 years? And should the fix be backported into -stable kernels?
