Add the kernel module: transparent huge pages set per machine (hq issue 746)

With THP 'always' journald's mmapped journal files sit in 2 MiB folios, so each small
journal write dirties and writes back 2 MiB; on the control node that saturated the
root mirror holding the bus store and the store, and the controller lost its lease.
The module sets the mode from a per-machine setting (default always, the kernel's own,
so assigning it changes nothing until a machine sets madvise), verifies it took, rotates
the journal once so new files are mapped under the new mode, gives back what it found
when stopped, and serves kernel_huge_pages to measure file_thp per unit.

This commit is contained in:

jschoubben

2026-10-14 23:31:13 +02:00

parent 0f76b6e232

commit 3a84044ece

10 changed files with 855 additions and 0 deletions

									
										modules/kernel/go.mod
									
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				module kernel

				go 1.22

				require git.novox.be/novox/mesh-sdk/go v0.1.7