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novel-only activity accounting (tools-fix a4840952)
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(tools-fix c8fb5377)
Dead-pid purge via in-band #nopid (zombie-aware probe), monotonic
(pid,starttime) client identity so trace-ring replays can never reset an
active client (fixes the m178 mid-run reset regression avenue), pre-capture
and post-capture stall watchdogs that re-assert pins and escalate loudly,
heartbeat threads for both tools, supervisor STALE 75s/GRACE 120s.
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stays
The m178 tool latching changes caused a reproducible pre-capture hang of the
third CUDA client after two green clients (r199: smiley #3; r200: multikernel
#3; both recovered by reverting tools only, r201). Prime suspect: semfix
per-client reset re-firing mid-run (same pid reset twice 2 min apart while the
client was active). Tools restored to the m177-proven state until the reset
logic is fixed with a monotonic per-pid guard.
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Kernel: authorship instrumentation + swrel gate for in-flight GR release VAs;
first-poll shortening + fast extended re-arm (params gr_retry_fast=1,
gr_first_poll_ms=2500); per-attempt win0 bank recompute + shadow recopy in the
outcome-retry loop; poll-break/deposit-readback diagnostics; C1-C10 sema
diagnostics (crel-entry, relx, opdef-clear, walk, pub-adv, hold-fallback,
busy-defer, CAND-OVERWRITE, inline recs); busy-defer hold instead of
software-release consume; counter fast path; QMD word 48/49 skip.
Tools: heartbeat thread, scanner-alive probe on reinstall, full periodic
re-assert, #nopid handling, per-client reset fix (debounce), dead-pid drop,
supervisor grace+threshold.
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(1) svc_session_flush keeps svc.direct_base (per-boot constant; the pin-free
targeted scanner's gate/input) and a new gsp_sema_service_guest_reset()
hook wipes boot-scoped discovery state on guest RM reload;
(2) counter-page derive now takes the first READABLE source (vaspaces ->
discovered -> targeted) instead of failing -EIO on a walked-but-garbage
page, with one-shot diagnostics;
(3) new m177c UVM ring-space directory discovery: content-verified
(push_va -> push_pa) samples from the GR content discovery and CE push
pairing feed a second discovered-directory slot (walks the 0x2xxxxxxx
family), consulted by svc_walk_discovered;
(4) GR channels now deliver withheld opdef sets at entry consume (normal
tail and the stale-skip path) instead of waiting for the 10 s sweep;
(5) host tools hardened: semfix_uvmt QMP reconnect + pid-generation dedupe
+ stale-sem eviction + post-success pin latch + heartbeats; pin_gr_stream
accept timeout + guest-scanner reinstall backoff + restart loop +
subprocess timeouts; new pin_supervisor.sh (heartbeat watchdog, capped
restarts) wired into start_vm_keep.sh.
Evidence: r194-r196 cycles; pool resolves src=trusted pin-free; ring dir
0x10801c000 found 4/4; row: 'rel-apply ... written' with tools up.
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Sweep of the 155 tracked C/Python/shell files under userspace/ (excluding
the MIT-licensed vendored userspace/extern/), tools/ and scripts/ that had
no per-file license identifier. Each gains the minimal two-line header in
the area's existing form: 'SPDX-License-Identifier: BSD-3-Clause' plus
'Copyright (c) 2026 Open-IOV contributors'; shebang and coding lines stay
first. No other content touched. kernel/** is deliberately out of scope
(recorded as a follow-up in CODESTD-REPORT-2026-10-08.md): its SPDX
coverage and MODULE_LICENSE normalization need their own GPL-2.0 pass.
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registry variant; complete vgsp rename; docs/tooling refresh
- gsp_phys_booter: GR promote bisection modes 4-17 (two-phase zero-field VA,
batched entries, hVirtMemory, bare VA, KMD SKIP_CTXBUFFER_ALLOC channel,
old-interface GPU_INITIALIZE_CTX, FBMEM context buffer, UVM-faithful PA-only,
PATCH/PM auxiliary promotes, server-managed no-promote path); PATCH/PM
geometry queries and buffers; pre-boot SET_REGISTRY profile selection
- gsp_phys_gpu: gsp_phys_rmcall_gr_promote clamp 0..17 and gsp_phys_srv_ctxbuf
parameter; registry image variant with RMSetClientRMAllocatedCtxBuffer=0
- vgsp rename across kernel, scripts, tools and docs (module vgsp.ko,
/sys/kernel/debug/vgsp/, vgsp-<subsystem>: log prefixes)
- risc-v-gsp-rm-debugger user-facing rename and docs/CI refresh; guest-diag
tool updates; README/SBOM/install/Makefile sync
Live status: CE ladder and P6 guest-copy forwarding green; GR engine context
commit still open (all promote shapes accepted or cleanly refused; the channel
stays CTXNOTVALID) - see Handoff-vGPU-IO.md Addendum 21 (local).
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A new CUDA client allocates fresh channel pools at the same GPU VAs; the
watcher kept the previous client's sem kptrs and seen-pin marks, so it
pinned the previous (freed) pool pages and the new client's release writes
went to dead memory. Clear the learned sems/marks on each pid change.
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retries until complete)
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guest-agent starvation)
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The first CE channel's push-buffer was only pinned ~1 minute after the
client's failure: uvbp fired at t+4s but semfix's trace read (guest agent,
every 5 loops) picked it up at t+70s, so the tracker wait for value 3 spun
for 16 s. The guest scanner now emits '#pb 0x<kptr>' from the uvbp trace
lines as soon as they appear; the host mirrors them into the sem stream and
semfix resolves/pins the push-buffer through the UVM chain on the next loop
(sub-second).
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queue 4k
- counter_pa autoreg result is written back to the channel table so later
passes cannot re-target a different slot when the live GR count changes
during teardown; re-registration of the same channel preserves the slot.
- counter slot layout uses the max GR count ever seen in the generation
instead of the shrinking live count.
- sema_map_add queue 64 -> 4096 entries so a full-window pin burst drains
without ENOSPC retries.
- pin_gr_stream: one batched sudo pass per flush (was one process per run,
~4 s for 400 runs), retrying only queue-rejected runs.
- semfix_uvmt: SEMFIX_SKIP_PB=1 skips the blocking push-buffer chain walk
when the vsock window stream already supplies those pages.
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last release VA; larger push log budget
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corruption); tooling guards
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semfix+uvmt watcher
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