Commit 5bf97e01 authored by Andi Kleen's avatar Andi Kleen Committed by Linus Torvalds
Browse files

[PATCH] x86-64: Use physflat on Intel for < 8 CPUs with CPU hotplug



This avoids races with the APIC broadcast/mask modes.
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 27183ebd
......@@ -104,9 +104,14 @@ void __init clustered_apic_check(void)
* (We don't use lowest priority delivery + HW APIC IRQ steering, so
* can ignore the clustered logical case and go straight to physical.)
*/
if (clusters <= 1 && max_cluster <= 8 && cluster_cnt[0] == max_cluster)
if (clusters <= 1 && max_cluster <= 8 && cluster_cnt[0] == max_cluster) {
#ifdef CONFIG_HOTPLUG_CPU
/* Don't use APIC shortcuts in CPU hotplug to avoid races */
genapic = &apic_physflat;
#else
genapic = &apic_flat;
else
#endif
} else
genapic = &apic_cluster;
print:
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment