Patches for Linux 7.1 May Have Negative Impact on 32-Bit Systems
19 hours ago
- #Linux Kernel
- #32-bit Systems
- #Performance Impact
- The Linux 7.1 kernel changes the inode 'i_ino' field from unsigned long to u64 to eliminate hacks for 64-bit identifiers on 32-bit systems.
- This modification increases struct inode size by at least 4 bytes on 32-bit architectures, potentially affecting cache line alignment and slab sizing.
- The change is intended to simplify code for modern 64-bit computing, with future cleanups possibly reducing inode structures like struct nfs_inode.
- Some patches for this update were generated using the LLM Claude, categorized by the developer as 'menial tasks'.
- While beneficial for 64-bit systems, the update may have negative performance implications for users still running modern Linux kernels on 32-bit hardware.