Reproducer: Create an fs with dnodesize=auto (also confirmed stall with 4k). Create (touch) a million files in the same directory. send/receive it and it stalls. 'zfs list' shows that the fs uses is 130M. The receive stalls/slowdown at 94M.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1840161 Title: Very severe regression in ZFS 0.7.12 in 18.04.3 Status in zfs-linux package in Ubuntu: In Progress Bug description: ZFS version 0.7.12 has a documented very severe regression on sending and receiving datasets with dnodesize=auto set on the dataset (not present in 0.7.9 or 0.8.1). This manifests itself primarily when sending and receiving datasets with lots of files, such as happens if root is on ZFS. This issue has been documented on the ZFSonlinux git repositories in issues: https://github.com/zfsonlinux/zfs/issues/9147 and https://github.com/zfsonlinux/zfs/issues/8458 Since 0.7.12 was just brought into 18.04.3, this regression is now affecting LTS. I'm opening this issue in the hopes that the fix is backported to the LTS release To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1840161/+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
