I'm trying to boot a fairly minimal x86 kernel image (5M uncompressed) with a small (11M) busybox rootfs in qemu with a minimum amount of memory. I'm able to reduce the memory available to qemu down to 21M and boot successfully, but below that, I get the following:
$ /home/dvhart/source/poky.git/build-qemux86/tmp/sysroots/x86_64-linux/usr/bin/qemu -kernel /home/dvhart/source/poky.git/build-qemux86/tmp/deploy/images/bzImage-qemux86.bin -hda /home/dvhart/source/poky.git/build-qemux86/tmp/deploy/images/core-image-minimal-qemux86.ext3 -m 20 --append "root=/dev/hda rw" qemu: fatal: Trying to execute code outside RAM or ROM at 0x014284ec EAX=014284ec EBX=01221000 ECX=00000000 EDX=00000000 ESI=00000000 EDI=01220ffc EBP=00100000 ESP=01431fc0 EIP=014284ec EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0018 00000000 ffffffff 00cf9300 DPL=0 DS [-WA] CS =0010 00000000 ffffffff 00cf9b00 DPL=0 CS32 [-RA] SS =0018 00000000 ffffffff 00cf9300 DPL=0 DS [-WA] DS =0018 00000000 ffffffff 00cf9300 DPL=0 DS [-WA] FS =0018 00000000 ffffffff 00cf9300 DPL=0 DS [-WA] GS =0018 00000000 ffffffff 00cf9300 DPL=0 DS [-WA] LDT=0000 00000000 00000000 00008200 DPL=0 LDT TR =0020 00001000 00000067 00008900 DPL=0 TSS32-avl GDT= 00012fd0 00000027 IDT= 00000000 00000000 CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000 DR0=00000000 DR1=00000000 DR2=00000000 DR3=00000000 DR6=ffff0ff0 DR7=00000400 CCS=00105fe0 CCD=00082ff0 CCO=SARL EFER=0000000000000000 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 Aborted I get similar results using the native qemu or kvm commands from my x86_64 Ubuntu 10.10 installation. The qemu console doesn't display anything past the SeaBIOS version, so I'm wondering if this is unrelated to the kernel image and simply a limitation of qemu and/or SeaBIOS. Does anyone have some experience working with qemu with < 20M of memory? I'm trying to get to the point where I can boot in 8M of memory. Thanks! -- Darren Hart Intel Open Source Technology Center Yocto Project - Linux Kernel
