a0e58e029a
libgit2's repository_init -> config-write -> FATFS -> wear-leveling chain nests ~10 GIT_PATH_MAX (4 KB) stack buffers deep; a trivial config write measured ~67 KB on hardware and overflowed the previous 48 KB, corrupting a newlib lock handle (LoadProhibited in xQueueGenericSend). Shared with the editor build, so this is temporary -- git should move to a dedicated large-stack task and this can drop back to ~16 KB.
58 lines
3.4 KiB
Plaintext
58 lines
3.4 KiB
Plaintext
# Rust often needs a bit of an extra main task stack size compared to C (the default is 3K)
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# You might have to increase this further if you allocate large stack variables in the main task.
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# Bumped for the TLS handshake (Spike 6): mbedtls runs on the calling task and
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# wants several KB of stack on top of the app's own usage.
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# Bumped hard for Spike 7: libgit2's call chain is stack-hungry. Nearly every
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# function puts a `char path[GIT_PATH_MAX]` (4 KB) buffer on the stack, and the
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# repository_init → config-write → FATFS → wear-leveling chain nests ~10 of them
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# deep — a trivial config write measured ~67 KB of stack on hardware, overflowing
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# the previous 48 KB and smashing an adjacent newlib lock handle (LoadProhibited
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# in xQueueGenericSend). The push (smart-HTTP + pack + mbedTLS) is deeper still.
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# NOTE: this earlier looked like "time() only works on the main task" — but that
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# iteration ran git on a std::thread with the default 4 KB stack; the same chain
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# just overflowed sooner. It's stack depth, not thread-vs-main.
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# CAVEAT: this sdkconfig is shared with the editor build, so the editor also
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# reserves this stack for nothing. Once the push is proven, git should move to a
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# dedicated large-stack task and this can drop back to ~16 KB.
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CONFIG_ESP_MAIN_TASK_STACK_SIZE=98304
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# Increase a bit these stack sizes as they are also a bit too small by default
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CONFIG_ESP_SYSTEM_EVENT_TASK_STACK_SIZE=4096
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CONFIG_FREERTOS_IDLE_TASK_STACKSIZE=4096
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# You might have to increase this further if you spawn your own Rust threads
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# that allocate large stack variables; or better yet - use
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# `std::thread::Builder::new().stack_size(XXX)` for spawning
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CONFIG_PTHREAD_TASK_STACK_SIZE_DEFAULT=4096
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# Raise the compile-time log ceiling so the sdmmc/sdspi drivers' per-command
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# DEBUG logs (the raw R1 response bytes) are built in. Runtime level stays INFO
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# by default; the SD spike bumps just the sdmmc/sdspi tags to DEBUG so we can see
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# exactly what each init command returns. (Diagnostic for Spike 3 init failures.)
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CONFIG_LOG_MAXIMUM_LEVEL_DEBUG=y
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# FatFS long filenames (Spike 3 — SD). Default is 8.3-only, which rejects the
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# persistence module's atomic-save temp name (`notes.md.tmp` has two dots).
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# LFN on the heap keeps the working buffer off the (small) task stack.
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CONFIG_FATFS_LFN_HEAP=y
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# PSRAM (Spike 7 — the git working set needs it; the docs memory plan budgets
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# ~1.5 MB PSRAM for pack/delta work, and the rope buffer lives there too). This
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# board is an ESP32-S3-WROOM-1-N16R8 → 8 MB *octal* PSRAM, so OCT mode is
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# required (quad would fail to init). USE_MALLOC adds PSRAM to the heap
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# allocator, so large allocations (Box, Rope, libgit2 buffers) land there
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# instead of the ~339 KB internal DRAM Spike 6 measured. Octal PSRAM occupies
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# GPIO 33–37; the EPD/SD pins (4–13) deliberately avoid that range, so no wiring
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# conflict. Speed left at the 40 MHz default (safe first-enable; 80 MHz needs
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# matching flash-freq config and is a later tuning step).
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CONFIG_SPIRAM=y
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CONFIG_SPIRAM_MODE_OCT=y
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CONFIG_SPIRAM_USE_MALLOC=y
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# TLS trust store (Spike 6 — Wi-Fi + TLS, the gate for Spike 7 git push).
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# The certificate bundle backs esp_crt_bundle_attach so an HTTPS GET to
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# api.github.com validates against real roots. FULL rather than the common
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# subset so a less common CA in the chain can't surprise us on the bench.
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CONFIG_MBEDTLS_CERTIFICATE_BUNDLE=y
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CONFIG_MBEDTLS_CERTIFICATE_BUNDLE_DEFAULT_FULL=y
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