On Fri, Jan 05, 2024 at 02:51:40PM +0800, Huang, Ying wrote: > > > > So we're talking ~1MB for 1024 threads with mempolicies to avoid error > > conditions mid-page-allocation and to reduce the cost associated with > > applying weighted interleave. > > Think about this again. Why do we need weights array on stack? I think > this is used to keep weights consistent. If so, we don't need weights > array on stack. Just use RCU to access global weights array. > >From the bulk allocation code: __alloc_pages_bulk(gfp, node, NULL, node_pages, NULL, page_array); This function can block. You cannot block during an RCU read context. ~Gregory
