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Use EVENTHANDLER_DIRECT_INVOKE() for device events, for better performance.

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This commit is contained in:
ian 2018-01-07 18:06:30 +00:00
parent 849a5573cb
commit bdbecc7f3f
1 changed files with 12 additions and 5 deletions
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17
sys/kern/subr_bus.c
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@ -34,6 +34,7 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h> #include <sys/param.h>
#include <sys/conf.h> #include <sys/conf.h>
#include <sys/eventhandler.h>
#include <sys/filio.h> #include <sys/filio.h>
#include <sys/lock.h> #include <sys/lock.h>
#include <sys/kernel.h> #include <sys/kernel.h>
@ -146,6 +147,10 @@ struct device {
static MALLOC_DEFINE(M_BUS, "bus", "Bus data structures"); static MALLOC_DEFINE(M_BUS, "bus", "Bus data structures");
static MALLOC_DEFINE(M_BUS_SC, "bus-sc", "Bus data structures, softc"); static MALLOC_DEFINE(M_BUS_SC, "bus-sc", "Bus data structures, softc");
EVENTHANDLER_LIST_DEFINE(device_attach);
EVENTHANDLER_LIST_DEFINE(device_detach);
EVENTHANDLER_LIST_DEFINE(dev_lookup);
static void devctl2_init(void); static void devctl2_init(void);
#define DRIVERNAME(d) ((d)? d->name : "no driver") #define DRIVERNAME(d) ((d)? d->name : "no driver")
@ -2938,7 +2943,7 @@ device_attach(device_t dev)
else else
dev->state = DS_ATTACHED; dev->state = DS_ATTACHED;
dev->flags &= ~DF_DONENOMATCH; dev->flags &= ~DF_DONENOMATCH;
EVENTHANDLER_INVOKE(device_attach, dev); EVENTHANDLER_DIRECT_INVOKE(device_attach, dev);
devadded(dev); devadded(dev);
return (0); return (0);
} }
@ -2972,12 +2977,14 @@ device_detach(device_t dev)
if (dev->state != DS_ATTACHED) if (dev->state != DS_ATTACHED)
return (0); return (0);
EVENTHANDLER_INVOKE(device_detach, dev, EVHDEV_DETACH_BEGIN); EVENTHANDLER_DIRECT_INVOKE(device_detach, dev, EVHDEV_DETACH_BEGIN);
if ((error = DEVICE_DETACH(dev)) != 0) { if ((error = DEVICE_DETACH(dev)) != 0) {
EVENTHANDLER_INVOKE(device_detach, dev, EVHDEV_DETACH_FAILED); EVENTHANDLER_DIRECT_INVOKE(device_detach, dev,
EVHDEV_DETACH_FAILED);
return (error); return (error);
} else { } else {
EVENTHANDLER_INVOKE(device_detach, dev, EVHDEV_DETACH_COMPLETE); EVENTHANDLER_DIRECT_INVOKE(device_detach, dev,
EVHDEV_DETACH_COMPLETE);
} }
devremoved(dev); devremoved(dev);
if (!device_is_quiet(dev)) if (!device_is_quiet(dev))
@ -5330,7 +5337,7 @@ find_device(struct devreq *req, device_t *devp)
/* Finally, give device enumerators a chance. */ /* Finally, give device enumerators a chance. */
dev = NULL; dev = NULL;
EVENTHANDLER_INVOKE(dev_lookup, req->dr_name, &dev); EVENTHANDLER_DIRECT_INVOKE(dev_lookup, req->dr_name, &dev);
if (dev == NULL) if (dev == NULL)
return (ENOENT); return (ENOENT);
*devp = dev; *devp = dev;