Hi, During test fengguang's readahead alloc-noretry patch, I have some thoughts In the 1000 dd case, page cache of sparse file hole are all zero indeed. So what about make a global zero page for that purpose, fs level know it is a hole, when write occurs on that page we can alloc a new page for that. I have no enough knowledge to implement it so just give out the question without patch, sorry. BTW, was there any attempt for this before? -- Regards dave -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
