** Description changed: Description Thus far we haven't had a compelling reason to spend our time making sure DAX is working properly with XFS realtime devices, but according to some comments on IRC, Darrick Wong is trying it and it isn't working: <djwong> now i run into the problem that if the data device doesn't support dax then we refuse to enable it on the rt device <djwong> ...also, if the datadev supports it but the rtdev does not, creating a dax rt file blow sup <djwong> "pwrite: Operation not supported" <djwong> mmap write just Bus errors • djwong discovers __bdev_dax_supported(), wonders why it takes a struct super_block * and not a struct block_device * <djwong> i guess the answer is that xfs_fs_fill_super should only disable dax if none of the devices support it, and we should only set S_DAX if blk_queue_dax(whichever device the file is on) Fix this and get DAX + realtime devices working. Target Kernel: TBD - Target Release: 19.10 + Target Release: 20.04
** Tags removed: intel-kernel-19.10 ** Tags added: intel-kernel-20.04 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1741394 Title: [Feature] Crystal Ridge - get DAX working with XFS realtime devices Status in intel: Triaged Status in linux package in Ubuntu: Incomplete Bug description: Description Thus far we haven't had a compelling reason to spend our time making sure DAX is working properly with XFS realtime devices, but according to some comments on IRC, Darrick Wong is trying it and it isn't working: <djwong> now i run into the problem that if the data device doesn't support dax then we refuse to enable it on the rt device <djwong> ...also, if the datadev supports it but the rtdev does not, creating a dax rt file blow sup <djwong> "pwrite: Operation not supported" <djwong> mmap write just Bus errors • djwong discovers __bdev_dax_supported(), wonders why it takes a struct super_block * and not a struct block_device * <djwong> i guess the answer is that xfs_fs_fill_super should only disable dax if none of the devices support it, and we should only set S_DAX if blk_queue_dax(whichever device the file is on) Fix this and get DAX + realtime devices working. Target Kernel: TBD Target Release: 20.04 To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1741394/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
