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- #
- # For a description of the syntax of this configuration file,
- # see the file kconfig-language.txt in the NuttX tools repository.
- #
- config FS_AIO
- bool "Asynchronous I/O support"
- default n
- depends on SCHED_LPWORK
- ---help---
- Enable support for aynchronous I/O. This selection enables the
- interfaces declared in include/aio.h.
- if FS_AIO
- config FS_NAIOC
- int "Pre-allocated AIO containers"
- default 8
- ---help---
- The AIO containers hold an AIO control block and appends information
- needed by the logic running within the RTOS. These structures are
- pre-allocated, the number pre-allocated controlled by this setting.
- This setting controls the number of asynchronous I/O operations that
- can be queued at one time. When this count is exhausted, the caller
- of aio_read(), aio_write(), or aio_fsync() will be forced to wait
- for an available container. That wait is minimized because each
- container is released prior to starting the next I/O.
- The AIO logic includes priority inheritance logic to prevent
- priority inversion problems: The priority of the low-priority work
- queue will be boosted, if necessary, to level of the waiting thread.
- endif
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