On Mon, 17 May 2010 17:38:04 -0700 Michael Evans <mjevans1983@xxxxxxxxx> wrote: > You should make it a sysfs controllable option to keep the counter > updated on spare discs or not. The default can be to keep it within > one as you currently are patching it to. Then later you can change > the default to the higher performance setting. Better, the presence > of that file can be used to test if the kernel supports it, and if it > doesn't initramfs scripts can react accordingly. There really isn't any need for user-space to know - this is an entirely in-kernel thing. mdadm already supports assembling arrays with widely different event_counts. It just gives them to the kernel and lets it make the final decision. And I think it is stretching things to call this a performance setting. It only changes behaviour when add devices is added/removed/failed or when an array is started or reshaped. None of those happen often enough that an extra spin-up is really going to be an issue. It is more an issue of simplicity and elegance. I don't think a sysfs option is appropriate for that. But thanks for the suggestion. 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
