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head/sys/kern/kern_timeout.c
| Show First 20 Lines • Show All 1,139 Lines • ▼ Show 20 Lines | if (cc_exec_curr(cc, direct) == c) { | ||||
| if ((flags & CS_DRAIN) != 0) { | if ((flags & CS_DRAIN) != 0) { | ||||
| /* | /* | ||||
| * The current callout is running (or just | * The current callout is running (or just | ||||
| * about to run) and blocking is allowed, so | * about to run) and blocking is allowed, so | ||||
| * just wait for the current invocation to | * just wait for the current invocation to | ||||
| * finish. | * finish. | ||||
| */ | */ | ||||
| while (cc_exec_curr(cc, direct) == c) { | if (cc_exec_curr(cc, direct) == c) { | ||||
| /* | /* | ||||
| * Use direct calls to sleepqueue interface | * Use direct calls to sleepqueue interface | ||||
| * instead of cv/msleep in order to avoid | * instead of cv/msleep in order to avoid | ||||
| * a LOR between cc_lock and sleepqueue | * a LOR between cc_lock and sleepqueue | ||||
| * chain spinlocks. This piece of code | * chain spinlocks. This piece of code | ||||
| * emulates a msleep_spin() call actually. | * emulates a msleep_spin() call actually. | ||||
| * | * | ||||
| * If we already have the sleepqueue chain | * If we already have the sleepqueue chain | ||||
| Show All 31 Lines | if ((flags & CS_DRAIN) != 0) { | ||||
| sleepq_wait( | sleepq_wait( | ||||
| &cc_exec_waiting(cc, direct), | &cc_exec_waiting(cc, direct), | ||||
| 0); | 0); | ||||
| sq_locked = 0; | sq_locked = 0; | ||||
| old_cc = NULL; | old_cc = NULL; | ||||
| /* Reacquire locks previously released. */ | /* Reacquire locks previously released. */ | ||||
| PICKUP_GIANT(); | PICKUP_GIANT(); | ||||
| CC_LOCK(cc); | goto again; | ||||
| } | } | ||||
| c->c_flags &= ~CALLOUT_ACTIVE; | c->c_flags &= ~CALLOUT_ACTIVE; | ||||
| } else if (use_lock && | } else if (use_lock && | ||||
| !cc_exec_cancel(cc, direct) && (drain == NULL)) { | !cc_exec_cancel(cc, direct) && (drain == NULL)) { | ||||
| /* | /* | ||||
| * The current callout is waiting for its | * The current callout is waiting for its | ||||
| * lock which we hold. Cancel the callout | * lock which we hold. Cancel the callout | ||||
| ▲ Show 20 Lines • Show All 380 Lines • Show Last 20 Lines | |||||