Public bug reported: On 20.04(focal) ga-kernel and 18.04 (hwe-kernel). To make.bcache would fail as below if the back devices are large than 1024G ( 1025 would fail, but not 1024 ).
[ 727.756453] bcache: register_bdev() error nvme12n1: cannot allocate memory [ 727.756456] bcache: register_bcache() error : failed to register device [ 727.756471] bcache: bcache_device_free() bcache device (NULL gendisk) stopped There are fix in 5.9 kernel and it can work after install 5.9 kernel on 20.04. The 5.9 kernel are download it from: https://kernel.ubuntu.com /~kernel-ppa/mainline/v5.9.16/ The similar bug report can be found at https://bugzilla.redhat.com/show_bug.cgi?id=1783075. It might related to back device type. it was tested on "Lenov SR665 Server" and "Intel P4510 4.0TB U.2 NVMe SSD", the caching disk are "Intel P4800X 375GB U.2 NVMe SSD". ** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete ** Tags: bionic focal ga-kernel hwe-kernel ** Tags added: bionic focal ga-kernel hwe-kernel ** Description changed: On 20.04(focal) ga-kernel and 18.04 (hwe-kernel). To make.bcache would - fail as below if the back devices are large than 1024G ( 102% fail, but - 1024 did not). + fail as below if the back devices are large than 1024G ( 1025 would + fail, but not 1024 ). [ 727.756453] bcache: register_bdev() error nvme12n1: cannot allocate memory [ 727.756456] bcache: register_bcache() error : failed to register device [ 727.756471] bcache: bcache_device_free() bcache device (NULL gendisk) stopped - - There are fix in 5.9 kernel and it can work after install 5.9 kernel on 20.04. The 5.9 kernel are download it from: https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.9.16/ + There are fix in 5.9 kernel and it can work after install 5.9 kernel on + 20.04. The 5.9 kernel are download it from: https://kernel.ubuntu.com + /~kernel-ppa/mainline/v5.9.16/ The similar bug reports are https://bugzilla.redhat.com/show_bug.cgi?id=1783075. It might related to back device type. We tested on "Lenov SR665 Server" and "Intel P4510 4.0TB U.2 NVMe SSD", the caching disk are "Intel P4800X 375GB U.2 NVMe SSD". -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1909518 Title: bcache register_bdev() error cannot allocate memory To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1909518/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
