On Friday October 24, pengxihan@xxxxxxxxx wrote: > hi, neil: > I want to use hardware engine to do XOR. The driver is based on > interrupt way, which will cause sleep. I found that in handle_stripe > function spin lock of a stripe is used during donging XOR. Since > between spin_lock and spin_unlock, sleep is not allowed, I want to > replace it with mutex, does it make sense? > What kernel version are you looking at? I ask because for quite some months (years?) we have had explicit support for hardware based xor using the "async_tx" extension to the async-crypto API. See crypto/async_tx/ and drivers/dma/ That is a much more complete approach. Just changing the lock type would not really help, there are other reasons why we cannot sleep in that code. NeilBrown -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
