Public bug reported: linux-raspi 5.4 in Focal is the first kernel that supports Pi 4B which requires LPAE to be enabled for armhf. Since we currently don't support board-specific kernels but follow a one-kernel-fits-all strategy, the LPAE kernel is also used on Pi 3 and 2 boards. Back then, running an armhf LPAE kernel on a Pi 3/2 resulted in additional kernel memory consumption of ~70MB compared to arm64 and non-LPAE kernels. For that reason I decided to introduce a raspi-nolpae flavor which can be used on Pi 3 and 2 (only). That flavor was never officially announced nor installed automatically anywhere. A user has to install in manually. We never had any complaints about kernel memory consumption so never directed anybody at installing this flavor. Therefore I'm assuming it's not being used...
Turns out that the early 5.4 kernels were broken and incorrectly initialized a 64MB SWIOTLB buffer which is the reason for the above additional memory consumption. This was fixed here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fcf044891c84e38fc90eb736b818781bccf94e38 With this commit, the memory consumption of both the armhf raspi and raspi-nolpae flavor are pretty much on par and there is really no reason anymore to keep the raspi-nolpae flavor around. So let's get rid of it and introduce a transitional package that replaces installed raspi- nolpae packages with raspi packages. ** Affects: linux-raspi (Ubuntu) Importance: Undecided Status: New ** Affects: linux-raspi (Ubuntu Focal) Importance: Undecided Status: Invalid ** Affects: linux-raspi (Ubuntu Jammy) Importance: Undecided Status: New ** Affects: linux-raspi (Ubuntu Kinetic) Importance: Undecided Status: New ** Affects: linux-raspi (Ubuntu Lunar) Importance: Undecided Status: New ** Affects: linux-raspi (Ubuntu Mantic) Importance: Undecided Status: New ** Also affects: linux-raspi (Ubuntu Lunar) Importance: Undecided Status: New ** Also affects: linux-raspi (Ubuntu Jammy) Importance: Undecided Status: New ** Also affects: linux-raspi (Ubuntu Focal) Importance: Undecided Status: New ** Also affects: linux-raspi (Ubuntu Kinetic) Importance: Undecided Status: New ** Also affects: linux-raspi (Ubuntu Mantic) Importance: Undecided Status: New ** Summary changed: - -nolpae flavor is pointless nowadays + raspi-nolpae flavor is pointless nowadays ** Changed in: linux-raspi (Ubuntu Focal) Status: New => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-raspi in Ubuntu. https://bugs.launchpad.net/bugs/2023359 Title: raspi-nolpae flavor is pointless nowadays Status in linux-raspi package in Ubuntu: New Status in linux-raspi source package in Focal: Invalid Status in linux-raspi source package in Jammy: New Status in linux-raspi source package in Kinetic: New Status in linux-raspi source package in Lunar: New Status in linux-raspi source package in Mantic: New Bug description: linux-raspi 5.4 in Focal is the first kernel that supports Pi 4B which requires LPAE to be enabled for armhf. Since we currently don't support board-specific kernels but follow a one-kernel-fits-all strategy, the LPAE kernel is also used on Pi 3 and 2 boards. Back then, running an armhf LPAE kernel on a Pi 3/2 resulted in additional kernel memory consumption of ~70MB compared to arm64 and non-LPAE kernels. For that reason I decided to introduce a raspi-nolpae flavor which can be used on Pi 3 and 2 (only). That flavor was never officially announced nor installed automatically anywhere. A user has to install in manually. We never had any complaints about kernel memory consumption so never directed anybody at installing this flavor. Therefore I'm assuming it's not being used... Turns out that the early 5.4 kernels were broken and incorrectly initialized a 64MB SWIOTLB buffer which is the reason for the above additional memory consumption. This was fixed here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fcf044891c84e38fc90eb736b818781bccf94e38 With this commit, the memory consumption of both the armhf raspi and raspi-nolpae flavor are pretty much on par and there is really no reason anymore to keep the raspi-nolpae flavor around. So let's get rid of it and introduce a transitional package that replaces installed raspi-nolpae packages with raspi packages. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/2023359/+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
