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1a061d9b4e
kernel_oct targets a WROOM-2 N32R8V: octal flash, and 8 MB of PSRAM for the page pool. The defaults size the pool for that part, with 8 pages of 64 KiB for each of the text, data and heap regions, so 1.5 MB per process. fork() duplicates the address environment, so a parent and a child need 3 MB at once and a module with 2 MB of PSRAM cannot do it. kernel_n8r2 sizes the same build for such a module. Each region is 2 pages, so a process takes 384 KiB and a fork() peaks at 768 KiB, inside a 1.5 MB pool placed at 0x80000 to leave the start of the PSRAM alone. The flash is quad and runs in DIO mode, so this configuration also exercises the CONFIG_ESP32S3_FLASH_MODE_OCT guard in kernel-space.ld from the quad side, which kernel_oct cannot. This is tight by construction. ostest has 115 KiB of text against a 128 KiB text region. A larger program needs a module with more PSRAM, not a larger pool. Verified on an ESP32-S3-DevKitC with an N8R2 module, 8 MB flash in DIO mode and 2 MB of embedded quad PSRAM. ostest reports "Parent and child had independent memory" and exits with status 0. Assisted-by: Claude Opus 5 (1M context) <noreply@anthropic.com> Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com> |
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| .. | ||
| arm | ||
| arm64 | ||
| avr | ||
| dummy | ||
| hc/m9s12 | ||
| mips | ||
| misoc/lm32/misoc | ||
| or1k/mor1kx/or1k | ||
| renesas | ||
| risc-v | ||
| sim/sim/sim | ||
| sparc | ||
| tricore | ||
| x86/qemu/qemu-i486 | ||
| x86_64/qemu/qemu-intel64 | ||
| xtensa | ||
| z16/z16f/z16f2800100zcog | ||
| z80 | ||
| .gitignore | ||
| Board.mk | ||
| boardctl.c | ||
| CMakeLists.txt | ||
| dummy.c | ||
| Kconfig | ||
| Makefile | ||