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boot: drop pci=realloc from default/toram GRUB entries, fold into troubleshooting entry

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pci=realloc was forcing a full PCI resource reallocation on every default
and toram boot, added as a GPU BAR workaround for BIOS without Above 4G
Decoding. On a dense NVMe-backplane server it exhausted MMIO32 space and
silently dropped 4 of 6 NVMe controllers from the OS even though the BIOS
and lspci both saw them fine. It now only applies to the no-GUI/gsp-off
troubleshooting entry, alongside a bible-local ADR for the two prior
rounds of SAT/blackbox durability work.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Mikhail Chusavitin
2026-07-28 09:34:25 +03:00
co-authored by Claude Sonnet 5
parent 781cf5dcbf
commit e036a9c7b8
8 changed files with 274 additions and 8 deletions
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bible-local/README.md
+2 -2
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@@ -43,7 +43,7 @@ Generic engineering rules live in `bible/rules/patterns/`.
- Inter-GPU communication check
- `all_reduce_perf`
- GPU bandwidth check
- `dcgmi diag -r nvbandwidth`
- `dcgmi diag -r nvbandwidth` (per CPU socket, then all selected GPUs, on multi-socket systems -- see `decisions/2026-07-27-nvbandwidth-per-socket-split.md`)
### Validate -> Stress
@@ -68,4 +68,4 @@ Generic engineering rules live in `bible/rules/patterns/`.
- Inter-GPU communication check
- `all_reduce_perf`
- GPU bandwidth check
- `dcgmi diag -r nvbandwidth`
- `dcgmi diag -r nvbandwidth` (per CPU socket, then all selected GPUs, on multi-socket systems -- see `decisions/2026-07-27-nvbandwidth-per-socket-split.md`)