foreign-builders: Allow 256 MiB of shared memory #203
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By default, Docker limits containers to using 64 MiB of shared memory. This is a problem for dolphin-emu/dolphin#13768, which calls MemoryManager::Init as part of a unit test. Under Dolphin's default configuration (GameCube without accurate MMU emulation), MemoryManager::Init allocates 32 MiB of shared memory for main RAM, 32 MiB of shared memory for fake VMEM, and 256 KiB of shared memory for the locked L1 cache, which in total is just above Docker's limit. To solve this, specify 256 MiB as the limit instead of using the default 64 MiB. This should be enough shared memory for MemoryManager even with the MEM1 and MEM2 size override settings maxed out.
jordan-woyak
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Jan 6, 2026
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Sounds fine to me. Untested.
OatmealDome
approved these changes
Jan 6, 2026
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By default, Docker limits containers to using 64 MiB of shared memory. This is a problem for dolphin-emu/dolphin#13768, which calls MemoryManager::Init as part of a unit test. Under Dolphin's default configuration (GameCube without accurate MMU emulation), MemoryManager::Init allocates 32 MiB of shared memory for main RAM, 32 MiB of shared memory for fake VMEM, and 256 KiB of shared memory for the locked L1 cache, which in total is just above Docker's limit.
To solve this, specify 256 MiB as the limit instead of using the default 64 MiB. This should be enough shared memory for MemoryManager even with the MEM1 and MEM2 size override settings maxed out.
This is untested!