[PATCH 3/6] lguest suppress IDE probing

Rusty Russell
2007-06-05T15:28:26Z

The IDE probe is the slowest part of boot: by suppressing it we cut
boot from from 3 seconds to half a second.

AFAICT, the commandline is the easiest way to suppress the probing.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
drivers/lguest/lguest.c | 6 ++++++
1 file changed, 6 insertions(+)

===================================================================
--- a/drivers/lguest/lguest.c
+++ b/drivers/lguest/lguest.c
@@ -605,6 +605,12 @@ __init void lguest_init(void *boot)
acpi_disabled = 1;
acpi_ht = 0;
#endif
+#ifdef CONFIG_BLK_DEV_IDE
+ /* Saves three seconds off boot time. */
+ strcat(boot_command_line,
+ " ide0=noprobe ide1=noprobe ide2=noprobe"
+ " ide3=noprobe ide4=noprobe ide5=noprobe");
+#endif

add_preferred_console("hvc", 0, NULL);