On 02/23/14 21:10, James Bottomley wrote: > Right ... my ideal here if we can achieve it would be lockless threaded > models, where we could make guarantees like single thread of execution > per command, so all command state could be lockless. This approach sounds interesting but could be challenging to implement. With this approach it would no longer be safe to access the SCSI command state from interrupt nor from tasklet context. That means that the I/O completion path would have to be modified such that instead of using an IPI to invoke a tasklet at the CPU that submitted the SCSI command a new mechanism would have to be used that causes the I/O completion code to run directly on the context of the thread that submitted the SCSI command. Bart. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
