incubator-nuttx/fs/aio/Kconfig

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#
# For a description of the syntax of this configuration file,
# see misc/tools/kconfig-language.txt.
#
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