I was not entirely surprised to find that btrfs has its own unique take on what to do with O_DIRECT: https://btrfs.wiki.kernel.org/index.php/Gotchas#Direct_IO_and_CRCs "the application will modify the page while it's inflight .. This results in checksum verification messages that are warnings instead of errors"
On Thu, Apr 2, 2020 at 2:20 AM <scine...@gmail.com> wrote: > > Regarding modified buffers during writeback how does btrfs handle o_direct > for checksum, compression, raid? What does mdraid do under ext4, xfs? That > MMU setting sounds like a good idea. > openzfs / openzfs-developer / see discussions + participants + delivery > options Permalink -- Paul Dagnelie ------------------------------------------ openzfs: openzfs-developer Permalink: https://openzfs.topicbox.com/groups/developer/T950b02acdf392290-M8e272454e732ce1d5a0047c5 Delivery options: https://openzfs.topicbox.com/groups/developer/subscription
