On 06/01/2014 10:24 PM, Naoya Horiguchi wrote: > Detail about the data format being passed to userspace are explained in > inline comment, but generally in long entry format, we can choose which > information is extraced flexibly, so you don't have to waste memory by > extracting unnecessary information. And with FINCORE_SKIP_HOLE flag, > we can skip hole pages (not on memory,) which makes us avoid a flood of > meaningless zero entries when calling on extremely large (but only few > pages of it are loaded on memory) file.
Something similar could be useful for hugetlbfs too. For a 1GB page, it's pretty silly to do 2^18 entries which essentially repeat the same data in an interface like this. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
