2.6.25-stable review patch. If anyone has any objections, please let us know. ------------------ From: PJ Waskiewicz commit 9d9ad4b51d2b29b5bbeb4011f5e76f7538119cf9 upstream This bug was introduced in the 2.6.24 i386/x86_64 tree merge, where MSI-X vector allocation will eventually fail. The cause is the new bit array tracking used vectors is not getting cleared properly on IRQ destruction on the 32-bit APIC code. This can be seen easily using the ixgbe 10 GbE driver on multi-core systems by simply loading and unloading the driver a few times. Depending on the number of available vectors on the host system, the MSI-X allocation will eventually fail, and the driver will only be able to use legacy interrupts. Signed-off-by: Peter P Waskiewicz Jr Signed-off-by: Linus Torvalds Signed-off-by: Greg Kroah-Hartman --- arch/x86/kernel/io_apic_32.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/x86/kernel/io_apic_32.c +++ b/arch/x86/kernel/io_apic_32.c @@ -2477,6 +2477,7 @@ void destroy_irq(unsigned int irq) dynamic_irq_cleanup(irq); spin_lock_irqsave(&vector_lock, flags); + clear_bit(irq_vector[irq], used_vectors); irq_vector[irq] = 0; spin_unlock_irqrestore(&vector_lock, flags); } -- -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html