Commit Graph
2 Commits
Author SHA1 Message Date
jschoubben bc77afa6bb issue 1841/S16: kernel_boot answers the loader, entries, kernels, booted entry and the fallback
ADR 0508 §9: the operator sees whether every boot menu lists the fallback kernel, and the room left on /boot.
2026-10-22 14:28:23 +02:00
jschoubben 3a84044ece 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.
2026-10-14 23:31:13 +02:00