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authorGreg Kroah-Hartman <gregkh@suse.de>2006-07-18 10:59:59 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2006-09-25 21:08:40 -0700
commit0f397f865076e3471ec884ee73ad5e34165fac2a (patch)
tree173e87afa0d6f5ab26c8faf1279d5d4a6c8758ce /drivers/pci/pci-driver.c
parentd779249ed4cb3b50690de6de8448829d65a1cd08 (diff)
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PCI: enable driver multi-threaded probe
This provides a build and run-time option to turn on multhreaded probe for all PCI drivers. It can cause bad problems on multi-processor machines that take a while to find their root disks, and play havoc on machines that don't use persistant device names for block or network devices. But it can cause speedups on some machines, my tiny laptop's boot goes up by 0.4 seconds, and my desktop boots up several seconds faster. Use at your own risk!!! Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/pci/pci-driver.c')
-rw-r--r--drivers/pci/pci-driver.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 8948ac9..d8ace1f 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -17,6 +17,16 @@
* Registration of PCI drivers and handling of hot-pluggable devices.
*/
+/* multithreaded probe logic */
+static int pci_multithread_probe =
+#ifdef CONFIG_PCI_MULTITHREAD_PROBE
+ 1;
+#else
+ 0;
+#endif
+__module_param_call("", pci_multithread_probe, param_set_bool, param_get_bool, &pci_multithread_probe, 0644);
+
+
/*
* Dynamic device IDs are disabled for !CONFIG_HOTPLUG
*/
@@ -408,6 +418,7 @@ int __pci_register_driver(struct pci_driver *drv, struct module *owner)
drv->driver.bus = &pci_bus_type;
drv->driver.owner = owner;
drv->driver.kobj.ktype = &pci_driver_kobj_type;
+ drv->driver.multithread_probe = pci_multithread_probe;
spin_lock_init(&drv->dynids.lock);
INIT_LIST_HEAD(&drv->dynids.list);