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This can be used on small systems to save RAM if the SHM object doesn't need to be cache-aligned. Signed-off-by: Jukka Laitinen <jukka.laitinen@tii.ae>
32 lines
895 B
Text
32 lines
895 B
Text
#
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# For a description of the syntax of this configuration file,
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# see the file kconfig-language.txt in the NuttX tools repository.
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#
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config FS_SHMFS
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bool "Shared memory support"
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default n
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select ARCH_VMA_MAPPING if BUILD_KERNEL
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---help---
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Include support for shm_open() and shm_close.
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if FS_SHMFS
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config FS_SHMFS_VFS_PATH
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string "Path to shared memory object storage"
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default "/var/shm"
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---help---
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The path to where shared memory objects will exist in the VFS
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namespace.
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config FS_SHMFS_NO_ALIGN
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bool "Skip cache-line alignment/padding of shm objects"
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default n
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---help---
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Skip cache-line alignment of the shm object metadata header and
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the object length. Saves RAM in FLAT builds where shm objects
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are never used as DMA targets and no cache maintenance is
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performed on their contents. Callers that need DMA-safe shm
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buffers must not enable this.
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endif # FS_SHMFS
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