>>>>> "Neil" == NeilBrown <neilb@xxxxxxx> writes: Neil, >> Might be nice to make the sysfs knob tweakable. Also, don't forget to >> add a suitable blurb to Documentation/ABI/. Neil> It isn't at all clear to me that having the sysfs knob Neil> 'tweakable' is a good idea. From the md/raid5 perspective, I Neil> would want to know for certain whether the pages in a give bio Neil> are guaranteed not to change, or if they might. I could set the Neil> BDI_CAP_STABLE_WRITES and believe they will never change, or test Neil> the BDI_CAP_STABLE_WRITES and let that tell me if they might Neil> change or not. But if the bit can be changed at any moment, then Neil> it can never be trusted and so becomes worthless to me. I was mostly interested in being able to turn it on for devices that haven't explicitly done so. I agree that turning it off can be problematic. -- Martin K. Petersen Oracle Linux Engineering -- 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
