> I've got OpenBSD 4.2 on a net4801 and am mounting /dev in RAM. > I'd like > to reduce the amount of memory used even further. > Currently only %4 is > used: > Filesystem Size Used Avail Capacity Mounted on > mfs:21800 853K 34.0K 777K 4% /dev > > What should I be aware of in /etc/fstab to minimize the memory > footprint of /dev? Currently, I have: > swap /dev mfs rw,-P/dev.base,-i1,-s2300,-c264,-m5,nosuid 0 0
I think that ramfs is dynamic, ie physical memory is not reserved during mount_mfs execution. To reduce the /dev memory fs space : - you can reduce the inodes density with -i. Default is one inode for 8196 bytes. - delete unused devices. Here is the command I use on my Soekris targets : # mount_mfs -i 256 -s 592 -P /var/run/dev swap /dev And the result is : # df -h /dev Filesystem Size Used Avail Capacity Mounted on mfs:31196 23.0K 6.0K 16.0K 27% /dev Number of files in /dev: # ls /dev | wc -l 307 > > Random changes to mfs' parameters aren't getting me anywhere. There > should be a rational way of arriving at optimal settings for mfs: > > -b block-size > -c fragments-per-cylinder-group > -f frag-size > -i bytes > -m free-space > -s size _______________________________________________ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
