I am debugging an issue on the OMAP where the serial irq processing is normally low (around 1%) but can sometimes rise to much higher (well over 10%). This lead me to sniff around the locking.... I notice that in some drivers eg. omap-serial.c the whole interrupt handling loop is locked via spin_lock(). However, other drivers such as serial-tegra.c use spin_lock_irqsave() for a loop that pretty much has the same form. Why is it that they don't use the same locking strategy? What would be better? Thanks Charles -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
