search for: is_process

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2019 Jun 05
1
Re: [PATCH libnbd 2/4] lib: Split nbd_aio_is_* functions into internal.
...--------------------------------------------------- > h->state is processing > checks nbd_aio_is_ready > (it's false) > h->state is moved to READY > checks nbd_aio_is_processing > (it's false) > validation check fails > > (However the state was valid so the validation check should have > succeeded). > > Fixes commit e63a11736930c381a79a8cc2d03844cfff5db3ef. > > Than...
2019 Jun 19
4
[libnbd PATCH] states: Never block state machine inside REPLY
...h this patch in place, the only time is_state_processing is true is during the ISSUE_COMMAND group when it is blocked on NotifyWrite. Thus, once handshaking is complete, we can reliably equate nbd_aio_get_direction() == DIRECTION_READ with is_ready(), nbd_aio_get_direction() == DIRECTION_BOTH with is_processing() in the ISSUE_COMMAND substate. Oddly enough, I am not getting any measurable performance difference with this patch applied and using examples/threaded-reads-and-writes coupled with nbdkit. My explanation is that in the common case, once a server has something to send, it is going to send th...
2019 Jun 05
9
[PATCH libnbd 0/4] lib: Atomically update h->state.
I need to think about this patch series a bit more, but it does at least pass the tests. Rich.