03.11.2011 14:58, Erich Titl пишет: > Hi Andrew > > at 03.11.2011 12:27, Andrew wrote: >> 03.11.2011 11:28, Andrew пишет: >>> P.S. linux kernel can load archived modules; this can slightly reduce >>> memory consumption by ramfs. >> From now 'next' branch uses compressed modules - now default memory >> footprint is ~20M; also it'll require much less RAM for module >> auto-loading (compressed module tree weights ~10M instead of ~20M). >> >> IMHO this modifocation also can be merged into 4.x branch (at first look >> it shouldn't break anything) > Let's see, the compression is just a simple gzip of the kernel modules > on the media, which should be compressed anyway in the .lrp format. Right. But .lrp is placed on big storage, and it's content - on ramdisk w/o compression. > Once the (kernel) modules are loaded in kernel space there is IMHO no > need to keep them in /lib/modules anyway, unless they need to be > reloaded. The cheapest way to save space is to simply not use > /lib/modules/kernel...... on the ram disk. > > cheers > > Erich > You never can surely know when somebody will need modules. For ex.: hotplug, new iptables rules... Yes, modules can be cleaned in local.start if it's surely not needed - but generally they should be present in system. Also compression decreases memory consumption for hardware autodetect for ~10MB. It has just one side-effect - longer depmod/modprobe execution. IMHO this is not too critical - I think on i486 it'll take additional 10-20 seconds max for booting. So why not to use it? :)
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