Date: Fri, 19 Jan 2024 16:33:05 +0000 From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 276463] Linux guest uses only 503G of memory when using UEFI loader Message-ID: <bug-276463-27103@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D276463 Bug ID: 276463 Summary: Linux guest uses only 503G of memory when using UEFI loader Product: Base System Version: 13.2-RELEASE Hardware: amd64 OS: Any Status: New Keywords: bhyve Severity: Affects Only Me Priority: --- Component: bhyve Assignee: virtualization@FreeBSD.org Reporter: antranigv@freebsd.am Created attachment 247783 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D247783&action= =3Dedit Information about the Linux Guest We have a massive system (details below) which runs a massive VM. The host = runs on FreeBSD while the VM guest is Ubuntu Linux. ``` Host Information: root@genomic:~ # sysctl hw.model hw.model: AMD EPYC 7702 64-Core Processor=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20 root@genomic:~ # sysctl hw.ncpu hw.ncpu: 256 root@genomic:~ # sysctl hw.physmem hw.physmem: 2185595944960 root@genomic:~ # sysctl hw.realmem hw.realmem: 2200361238528 ``` The VM uses 1.5TB of RAM, here's the VM configuration: ``` # vm info comp0 ------------------------ Virtual Machine: comp0 ------------------------ state: stopped datastore: default loader: uefi uuid: 2893e12c-637d-11ee-af94-7cc255269cb8 cpu: 240 cpu-topology: sockets=3D2, cores=3D60, threads=3D2 memory: 1536G network-interface number: 0 emulation: virtio-net virtual-switch: public fixed-mac-address: 58:9c:fc:0e:4b:00 fixed-device: - virtual-disk number: 0 device-type: file emulation: virtio-blk options: - system-path: /usr/local/vm/comp0/disk0.img bytes-size: 216895848448 (202.000G) bytes-used: 190077076480 (177.023G) ``` and here's the bhyve arguments according to vm-bhyve: ``` Jan 19 15:40:32: [bhyve options: -c 240,sockets=3D2,cores=3D60,threads=3D2= -m 1536G -Hwl bootrom,/usr/local/share/uefi-firmware/BHYVE_UEFI.fd -U 2893e12c-637d-11ee-af94-7cc255269cb8 -u -S] Jan 19 15:40:32: [bhyve devices: -s 0,hostbridge -s 31,lpc -s 4:0,virtio-blk,/usr/local/vm/comp0/disk0.img -s 5:0,virtio-blk,/dev/zvol/zscratch/scratch -s 6:0,virtio-net,tap0,mac=3D58:9c:fc:0e:4b:00 -s 7:0,passthru,68/0/81 -s 8:0,fbuf,tcp=3D127.0.0.1:5900,wait] ``` We've been using the GRUB loader for a while and decided to move to the UEFI loader. After the migration we noticed that Linux shows only 503GB of RAM f= rom the 1.5TB allocated. We didn't have such issue when using the grub loader. I'm attaching a tarball which has information of the Linux system, including the following files. linux_uefi_iomem.txt =E2=80=94 /proc/iomem linux_uefi_meminfo.txt =E2=80=94 /proc/meminfo linux_uefi_vmstat.txt =E2=80=94 /proc/vmstat linux_uefi_dmidecode.txt =E2=80=94 dmidecode linux_uefi_free.txt =E2=80=94 free linux_uefi_dmesg.txt =E2=80=94 dmesg linux_uefi_cpuinfo.txt =E2=80=94 /proc/cpuinfo We've also noticed that inside of TianoCore's UEFI menu, it shows the 1.5TB= of RAM properly (check screenshot at: https://notes.bsd.am/bhyve_uefi_menu.png= ) Not sure if this is an issue with Linux or bhyve's UEFI loader. any tips are appreciated. --=20 You are receiving this mail because: You are the assignee for the bug.=
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