table of contents
IBV_IS_FORK_INITIALIZED(3) | Libibverbs Programmer’s Manual | IBV_IS_FORK_INITIALIZED(3) |
NAME¶
ibv_is_fork_initialized - check if fork support (ibv_fork_init) is enabled
SYNOPSIS¶
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#include <infiniband/verbs.h> enum ibv_fork_status {
IBV_FORK_DISABLED,
IBV_FORK_ENABLED,
IBV_FORK_UNNEEDED, }; enum ibv_fork_status ibv_is_fork_initialized(void);
DESCRIPTION¶
ibv_is_fork_initialized() checks whether libibverbs fork() support was enabled through the ibv_fork_init() verb.
RETURN VALUE¶
ibv_is_fork_initialized() returns IBV_FORK_DISABLED if fork support is disabled, or IBV_FORK_ENABLED if enabled. IBV_FORK_UNNEEDED return value indicates that the kernel copies DMA pages on fork, hence a call to ibv_fork_init() is unneeded.
NOTES¶
The IBV_FORK_UNNEEDED return value takes precedence over IBV_FORK_DISABLED and IBV_FORK_ENABLED. If the kernel supports copy-on-fork for DMA pages then IBV_FORK_UNNEEDED will be returned regardless of whether ibv_fork_init() was called or not.
SEE ALSO¶
AUTHOR¶
Gal Pressman <galpress@amazon.com>
2020-10-09 | libibverbs |