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Allocate device softc from the device domain.

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Since we are trying to bind device interrupt threads to the device domain,
it should have sense to make memory often accessed by them local. If domain
is not known, fall back to round-robin.

MFC after:	2 weeks
Sponsored by:	iXsystems, Inc.
This commit is contained in:
Alexander Motin 2019-10-12 19:03:07 +00:00
parent d195cbc09d
commit a89a562b60
1 changed files with 13 additions and 5 deletions
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18
sys/kern/subr_bus.c
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@ -34,6 +34,7 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/conf.h>
#include <sys/domainset.h>
#include <sys/eventhandler.h>
#include <sys/filio.h>
#include <sys/lock.h>
@ -2541,7 +2542,7 @@ void
device_set_softc(device_t dev, void *softc)
{
if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC))
free(dev->softc, M_BUS_SC);
free_domain(dev->softc, M_BUS_SC);
dev->softc = softc;
if (dev->softc)
dev->flags |= DF_EXTERNALSOFTC;
@ -2558,7 +2559,7 @@ device_set_softc(device_t dev, void *softc)
void
device_free_softc(void *softc)
{
free(softc, M_BUS_SC);
free_domain(softc, M_BUS_SC);
}
/**
@ -2817,6 +2818,9 @@ device_is_devclass_fixed(device_t dev)
int
device_set_driver(device_t dev, driver_t *driver)
{
int domain;
struct domainset *policy;
if (dev->state >= DS_ATTACHED)
return (EBUSY);
@ -2824,7 +2828,7 @@ device_set_driver(device_t dev, driver_t *driver)
return (0);
if (dev->softc && !(dev->flags & DF_EXTERNALSOFTC)) {
free(dev->softc, M_BUS_SC);
free_domain(dev->softc, M_BUS_SC);
dev->softc = NULL;
}
device_set_desc(dev, NULL);
@ -2833,8 +2837,12 @@ device_set_driver(device_t dev, driver_t *driver)
if (driver) {
kobj_init((kobj_t) dev, (kobj_class_t) driver);
if (!(dev->flags & DF_EXTERNALSOFTC) && driver->size > 0) {
dev->softc = malloc(driver->size, M_BUS_SC,
M_NOWAIT | M_ZERO);
if (bus_get_domain(dev, &domain) == 0)
policy = DOMAINSET_PREF(domain);
else
policy = DOMAINSET_RR();
dev->softc = malloc_domainset(driver->size, M_BUS_SC,
policy, M_NOWAIT | M_ZERO);
if (!dev->softc) {
kobj_delete((kobj_t) dev, NULL);
kobj_init((kobj_t) dev, &null_class);