Am 01.12.2015 um 16:08 schrieb Andrew:
Hi 01.12.2015 16:20, Erich Titl пишет:Hi AndrewAnd SoC network drivers also may be compiled in kernel, notas modules to save some space. Rest of modules (like additional USB network adapters, iptables modules and so on) will be compiled as modules.I suggest to build a new modules.sqfs with the kernel directory level removed and permanently mounted to /lib/modules/kernel. This way we can avoid to have to copy the modules to /lib/modules completely. We just need to run depmod once the squashfs is mounted, then module loading can be done from the squashfs directly and if user specific modules are needed they can either be on an OverlayFS or be written to a subdirectory of /lib/modules.Permanent squashfs mounting IMHO isn't a good idea - this will require permanent underlying device mounting. This is OK when we use mtdblock which contains squashfs - but device's flash size usually 4-8 MB, so there'll be no free place for modules.sqfs on it. Rest of files will be loaded from USB flash, or even from network.Ahh, you don't like the underlying FS be mounted to access the squashfs file. We could always use a raw partition for this purpose.In any case - we can't remove USB flash, this may cause kernel panic.
That is true, but not my issue here.
This may be done as option - but IMHO it'll be useful only in some rare cases. Because main feature of LEAF - it doesn't require HDD/flash storage that is always mounted.True, but we could still do that, as /lib/modules is not really needed once the system is running, except for the rare case when you need to load another module. We could mount modules.sqfs, load the modules from there and then just unmount it without copying the module to ram. There would be no modules cluttering valuable ram disk. For the occasional loading of modules we could build a wrapper for modprobe.Yes, delayed unmounting (for ex., by S99umount) may be better solution.
You still need something for loading a specific module after system boot. Of course, educating the user may help :-)
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