On Mon, 2009-06-29 at 13:16 +0300, Avi Kivity wrote: > > If I boot with -m 512 I get this: > > root@(none):~# free > > total used free shared buffers cached > > Mem: 378608 25196 353412 0 1012 8692 > > -/+ buffers/cache: 15492 363116 > > Swap: 0 0 0 > > > > > > so something is definitely eating a lot of memory (missing about 142M). > > Same guest kernel/fs in qemu gets: > > freeroot@(none):~# free > > total used free shared buffers cached > > Mem: 407080 23236 383844 0 1056 8692 > > -/+ buffers/cache: 13488 393592 > > Swap: 0 0 0 > > > > so it's missing about 114M. > > > > I get 500MB with 2.6.31-rc1+. So even my qemu is missing a lot more than you are. But I guess my kernel might also be a lot larger. > What does dmesg say about the e820 map? [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009f000 (usable) [ 0.000000] BIOS-e820: 000000000009f000 - 00000000000a0000 (reserved) [ 0.000000] BIOS-e820: 00000000000e8000 - 0000000000100000 (reserved) [ 0.000000] BIOS-e820: 0000000000100000 - 000000000fff0000 (usable) [ 0.000000] BIOS-e820: 000000000fff0000 - 0000000010000000 (ACPI data) [ 0.000000] BIOS-e820: 00000000fffbc000 - 0000000100000000 (reserved) johannes
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