Hi, Can someone give me a quick outline of why spinlocks are required in the EXT4 code? Don't all file-system requests originate from user context, hence meaning all locking be done with mutexes or semaphores. I'm doing some profiling on an ARM device it's showing up spin unlock taking a lot of time and I'd like to migrate to using mutex's instead since they don't incur penalties from synchronization instructions like DMB. I'm guessing there's some underlying reason why this isn't safe and I'd like to understand it. thanks, -Pete Fordham -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
