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On Sat, 2011-04-02 at 02:22 +0700, Pandu Poluan wrote: |
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> Good grief! How'd you do that?! |
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> |
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> *bow in respect* |
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> |
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> Rgds, |
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> |
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> |
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Well, firstly, I managed to get it down to 3MB (though I cheated *a |
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little*): |
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|
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lilpenguin ~ # sync ; echo 3 > /proc/sys/vm/drop_caches # kinda cheating |
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lilpenguin ~ # free -m |
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total used free shared buffers |
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cached |
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Mem: 43 5 37 0 0 |
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1 |
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-/+ buffers/cache: 3 39 |
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Swap: 0 0 0 |
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lilpenguin ~ # uname -srm |
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Linux 2.6.36-gentoo-r8 x86_64 |
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lilpenguin ~ # df -h |
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Filesystem Size Used Avail Use% Mounted on |
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/dev/vda1 4.0G 157M 3.6G 5% / |
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shm 22M 0 22M 0% /dev/shm |
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So what it is is this: |
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|
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* kvm with virtio devices |
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* no udev (static /dev) |
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* serial console only |
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* no services in default runlevel |
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* tight module-less virtio-based kernel (booted externally) |
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* no extra (virtual) hardware |
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* everything compiled with -Os |
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I got the disk space down low by removing everything not needed to boot |
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and get into the system (which means the portage tree, compiler, etc), |
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but that has nothing to do with the memory usage. |
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I could probably get it lower by tweaking the kernel a bit more. Also |
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it would probably use slightly less RAM if it were 32-bit. Also, the |
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biggest user of memory are /bin/bash and /bin/login. I could minimize |
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memory further by making the login shell ash or dash. |
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