On 06/20/2017 06:43 AM, Christoph Hellwig wrote: > On Tue, Jun 20, 2017 at 06:43:10AM -0600, Jens Axboe wrote: >>> Question: IFF we can get the per-file hints to propagate to the >>> writeback code (which I think is pretty easy for ext4/xfs/bdev, not >>> sure about btrfs) do we even need the per-inode ones at all? >> >> How is that possible, the file could be long gone by the time >> the writeback kicks in? > > each time a page/buffer is dirtied we can propagate the hint. To the page? Where do you want to find room for that? -- Jens Axboe
