On Mon, Sep 26, 2016 at 02:52:09PM -0700, Darrick J. Wong wrote: > The two functions /could/ be merged but I'm hesitant to combine them > because they run as different workqueue items. > > Setting speculative_cow_prealloc_lifetime to a (much) higher value than > speculative_prealloc_lifetime has been useful for combatting CoW > fragmentation on VM hosts where the VMs experience bursty write > behaviors and we can keep the utilization ratios low enough that we > don't start to run out of space. IOWs, it benefits us to keep the CoW > fork reservations around for as long as we can unless we run out of > blocks or hit inode reclaim. Ok, so there is a good use case for it. It just felt to me like there was a little bit too much duplication, that's why I asked. -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
