Why not just let Ms run goroutines directly? The problem is system calls. When an M enters the kernel, the entire OS thread blocks — and if all the scheduling resources were attached to the M, they’d be stuck too. The run queue, the memory cache, everything would be frozen until the syscall returns. By putting all of that on a separate P, the runtime can detach the P from a blocked M and hand it to a free one. The work keeps moving even when a thread is stuck.
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王煜：我建议，在“十五五”规划之中，制定并发布国家级民营经济发展行动计划，明确未来五年民营经济在市场主体活力、民间投资信心、创新能力、产业结构等方面的全国性量化目标。
国防和军队现代化是中国式现代化的重要组成部分。党的二十届四中全会对“如期实现建军一百年奋斗目标，高质量推进国防和军队现代化”进行科学擘画、作出战略部署。