__get_reqs_available

Name:__get_reqs_available

Proto:static bool __get_reqs_available(struct kioctx *ctx)

Type:bool

Parameter:

Type	Parameter	Name
struct kioctx *	ctx

922

bool ret = false

925

local_irq_save(flags)

926

kcpu = this_cpu_ptr(cpu)

927

If Not reqs_available Then

928

avail = atomic_read( & * This counts the number of available slots in the ringbuffer, * so we avoid overflowing it: it's decremented (if positive) * when allocating a kiocb and incremented when the resulting * io_event is pulled off the ringbuffer. * We batch accesses to it with)

930

Do

931

If avail < * For percpu reqs_available, number of slots we move to/from global * counter at a time: Then Go to out

934

935

avail = atomic_cmpxchg( & * This counts the number of available slots in the ringbuffer, * so we avoid overflowing it: it's decremented (if positive) * when allocating a kiocb and incremented when the resulting * io_event is pulled off the ringbuffer. * We batch accesses to it with, avail, avail - * For percpu reqs_available, number of slots we move to/from global * counter at a time:)

937

When avail != old cycle

939

reqs_available += * For percpu reqs_available, number of slots we move to/from global * counter at a time:

942

ret = true

943

reqs_available--

944

out :

945

local_irq_restore(flags)

946

Return ret

**Caller**
Name	Describe
get_reqs_available

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