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wipe)
The flush fires when the channel table momentarily empties - a live
client's UVM channel cycling triggers it - and wiping the map left the
client's already-resolved data VAs unresolvable until a rebuild scan
re-found them, which it may not. Evidence: a mid-battery boot where
multikernel's operands went NO ENTRY 40+ s after a flush (the rebuild
restored 14-31 K entries without them); the pump stalled for minutes and
the next clients read back whole-page garbage. The map is a cache with a
merge-on-rebuild contract, so re-compact it (dedup + sort) and keep it as
the merge base; reused-VA correctness stays with the ledger landing, the
pin-wins rule and the fresh scan.
Also: push_battery.sh now pushes inplace_scale (the battery list had it,
the push list did not).
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freeze)
The guest PMA scrubber (in-guest CeUtils CE channel, 4096 GPFIFO entries)
waits on its channel buffer's finish payload (offset 0x6c004) after the
third CUDA session's pages must be scrubbed; nothing in the emulation
authored it, so cudaMalloc froze in scrubCheckAndWaitForSize.
- channel_add: detect the 4096-entry scrubber channel and stash its USERD
PA/ring geometry (the channel itself is left untouched: no rank change,
no pump change - the colliding numeric-handle FREE may still unregister
it, the geometry survives).
- sema_scrubbuf_add debug param: register the finish/host-semaphore word
PAs the guest scanner resolves (vmallocinfo + kcore walk), because the
RM kernel VA space collides numerically with the client CE window in the
global VA map and cannot be resolved through it.
- svc_scrub_pass (service thread, per pass): from the channel's own USERD
GPPut, track submitted scrub blocks across wraps, then author USERD
GP_GET = put, host semaphore = put and finish payload = submitted.
Forward-only, idempotent, zero writes while the scrubber idles.
Live-validated mechanism (r137 VM): authoring the finish word at the kcore-
resolved PA let the frozen victory_matmul leave scrubCheckAndWaitForSize
and proceed to its launch.
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