DragonFlyBSD

I suggest we actually move away from mfs and use tmpfs instead. This would
involve (at least) the following steps:
- Change the fstab for the nrelease magic to use tmpfs, but keeping the same
options in use (i.e. size [note that mfs' size is in sectors, iirc])
- Probably expand mount_tmpfs to use FSCopy & FSPaste with an optional parameter
'-C', as with mount_mfs, as long as we don't have a working unionfs. FSCopy and
FSPaste can be found in newfs/fscopy.c. An alternative to this would be finally
fixing unionfs, but that's a more complicated issue.
- Test a few installations to see if everything still works as expected with the
new tmpfs magic. This would ideally include both x86 and x86_64.

Cheers,
Alex Hornung

Alex Hornung <ahornung@gmail.com> added the comment:

I suggest we actually move away from mfs and use tmpfs instead. This would
involve (at least) the following steps:
- Change the fstab for the nrelease magic to use tmpfs, but keeping the
same
options in use (i.e. size [note that mfs' size is in sectors, iirc])
- Probably expand mount_tmpfs to use FSCopy & FSPaste with an optional
parameter
'-C', as with mount_mfs, as long as we don't have a working unionfs.
FSCopy and
FSPaste can be found in newfs/fscopy.c. An alternative to this would be
finally
fixing unionfs, but that's a more complicated issue.
- Test a few installations to see if everything still works as expected
with the
new tmpfs magic. This would ideally include both x86 and x86_64.

Cheers,
Alex Hornung

This might be slightly inaccurate, but is it possible currently, when
using LiveCD, to write to the memory filesystem? (either mfs or tmpfs). It
would be great. I often had a need in the past to create temporary files.

Petr

:This might be slightly inaccurate, but is it possible currently, when
:using LiveCD, to write to the memory filesystem? (either mfs or tmpfs). It
:would be great. I often had a need in the past to create temporary files.
:
:Petr

Several mount points such as /var, /tmp, and /etc are writable when
    booting from a LiveCD, precisely because they are using a memory
    filesystem (mfs, tmpfs, whatever).

Yes, it's convenient to be able to edit those even though they will
    reset on reboot.

-Matt
                    Matthew Dillon 
                    <dillon@backplane.com>