Also, 18.04 ga-kernel worked fine too. ** 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 ( 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 reports are + The similar bug report can be found at 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". + 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". -- 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/1909518 Title: bcache register_bdev() error cannot allocate memory Status in linux package in Ubuntu: Incomplete Bug description: 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". To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1909518/+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
