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The kernel module's transparent-huge-pages defaults to madvise, the mesh's chosen value (hq issue 856, ADR 0381 §2, §3)
mesh/merge-gate head c816cafc00bd merged into trunk de6657c846b9 — pass: builds kernel → ace, g14, novox, shanks; no bus step; every machine composes with …
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mesh/repo-check head c816cafc00bd merged into trunk de6657c846b9 — pass: its merge-check.sh passed, each part in its toolchain: merge-check.sh (go), merge-…
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mesh/delivery delivered
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jschoubben
2026-10-15 22:45:07 +02:00
parent de6657c846
commit c816cafc00
3 changed files with 7 additions and 7 deletions
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modules/kernel/module.json
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@@ -7,8 +7,8 @@
"settings": {
"transparent-huge-pages": {
"kind": "preference",
"default": "always",
"why": "always is what the distribution's kernel boots with, so assigning the module changes nothing until a machine sets another value; madvise gives huge pages only to programs that ask for them, which stops a small write to a mapped file (the journal) dirtying and writing back a whole 2 MiB page on a machine whose disks are slow (novox/hq issue 746)"
"default": "madvise",
"why": "madvise is the value the mesh chose for every node (novox/hq ADR 0381), not the always the distribution's kernel boots with; a machine that needs another value is given it as its own setting; madvise gives huge pages only to programs that ask for them, which stops a small write to a mapped file (the journal) dirtying and writing back a whole 2 MiB page on a machine whose disks are slow (novox/hq issue 746)"
}
},
"tools": [