在 Linux 内核中，页面缓存（Page Cache）负责把磁盘文件缓存到内存中，于是当一个进程去读取缓存里的文件时，为了防止这块内存页（在现代内核中称为 folio）在读取中途被其他线程释放掉，内核必须遵循一套严密的安全动作：先给这个 folio ...

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Six of the world’s largest banks have agreed to stop separately paying to patch the same open source libraries. In Prague ...