Thanks that helps a lot..Thanks again.. On Sun, Mar 24, 2013 at 7:55 AM, Steve deRosier <deros...@gmail.com> wrote:
> Ashish, > > With respect, people here have already mentioned a couple of ways. The > most common for non-embedded systems is a initramfs or initrd via a cpio > archive. There's extensive documentation on this in > Documentation/initrd.txt. > > Embedded systems typically _don't_ want a writable root filesystem. > uClinux is typically setup with a romfs, and then a writeable ramfs located > at /var. If you're looking for a space to write temporary files during > runtime, you'd probably want to do so there. Be aware of course that those > go away at reboot. And for that matter, typically the way the initramfs or > initrd work is you may be able to write to them, but on reboot any changes > aren't persisted anyway. > > In my rc file: > /bin/expand /etc/ramfs.img /dev/ram1 > mount -t ext2 /dev/ram1 /var > > There's also tmpfs. You can set one of those up (exist in 2.4??) and mount > on some arbitrary mount point. > > For writable and persisting, you're going to need to use a real filesystem > on some real media, either disk or flash. And if you don't need > persistance, then I don't see why directing your temp files to an already > writable space in /var or /tmp won't work. > > As for the exact configuration settings and all that... well, you're on a > 2.4 kernel and nearly no one is bothering with that kernel anymore. Heck, > I'm working on a 3.2 kernel and someone told me the other day that I'm way > out-of-date. Anyway, since you're on a 2.4 kernel, I certainly don't > remember the specific settings anymore, nor do I have one setup that way > lying around to check for you. You're going to do some looking and some > trial-and-error to figure out the correct settings. But I'd be shocked if > there isn't some legacy how-to out there. And > the aforementioned documentation should be sufficient. > > If you don't have a very compelling reason to stay on a 2.4 kernel you > might want to consider upgrading. Especially if you're starting a new > project. > > I hope that helps, > - Steve > > > > > > On Sat, Mar 23, 2013 at 4:14 PM, Ashish Phogat > <engineerpho...@gmail.com>wrote: > >> Hi, >> Could someone provide me the mechanism/configuration to have a RAM based >> filesystem which is writable? My kernel is 2.4. >> >> Thanks for replying >> >> >> On Sat, Mar 23, 2013 at 4:19 AM, Greg Ungerer <gregunge...@westnet.com.au >> > wrote: >> >>> Hi Lennart, >>> >>> On 22/03/13 23:41, Lennart Sorensen wrote: >>> > The fact we can recreate the cpio archive and update the uImage from >>> > the kernel and cpio archive is great. No recompile crap to deal with >>> > the way romfs and such have tended to need. For us building the kernel >>> > and the filesystem are totally seperate issues. >>> >>> I don't follow you here. How does using a ROMfs mean that building >>> the kernel and filesystem are not separate? >>> >>> Regards >>> Greg >>> >>> >>> >>> _______________________________________________ >>> uClinux-dev mailing list >>> uClinux-dev@uclinux.org >>> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev >>> This message was resent by uclinux-dev@uclinux.org >>> To unsubscribe see: >>> http://mailman.uclinux.org/mailman/options/uclinux-dev >>> >> >> >> _______________________________________________ >> uClinux-dev mailing list >> uClinux-dev@uclinux.org >> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev >> This message was resent by uclinux-dev@uclinux.org >> To unsubscribe see: >> http://mailman.uclinux.org/mailman/options/uclinux-dev >> > > > _______________________________________________ > uClinux-dev mailing list > uClinux-dev@uclinux.org > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > This message was resent by uclinux-dev@uclinux.org > To unsubscribe see: > http://mailman.uclinux.org/mailman/options/uclinux-dev >
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