Linux and kernel

LWN documents the kernel iomap layer

2026-07-07 digest discussion

  • Category: Linux/Kernel
  • Status: discussion
  • Sources: LWN
  • Summary: An LWN article walks through the kernel's iomap layer, the block-mapping and I/O abstraction that filesystems increasingly use in place of the older buffer-head interface. The mainline tree is in the 7.2 merge window, with 7.2-rc2 tagged.
  • Why it matters: iomap is the path filesystem work is moving toward for buffered and direct I/O, so its behavior affects filesystem maintainers and performance work.

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