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    SubjectRe: [PATCH 0/5] initmpfs v2: use tmpfs instead of ramfs for rootfs
    On Wed, 17 Jul 2013, Andrew Morton wrote:
    > On Tue, 16 Jul 2013 08:31:13 -0700 (PDT) Rob Landley <rob@landley.net> wrote:
    >
    > > Use tmpfs for rootfs when CONFIG_TMPFS=y and there's no root=.
    > > Specify rootfstype=ramfs to get the old initramfs behavior.
    > >
    > > The previous initramfs code provided a fairly crappy root filesystem:
    > > didn't let you --bind mount directories out of it, reported zero
    > > size/usage so it didn't show up in "df" and couldn't run things like
    > > rpm that query available space before proceeding, would fill up all
    > > available memory and panic the system if you wrote too much to it...
    >
    > The df problem and the mount --bind thing are ramfs issues, are they
    > not? Can we fix them? If so, that's a less intrusive change, and we
    > also get a fixed ramfs.

    I'll leave others to comment on "mount --bind", but with regard to "df":
    yes, we could enhance ramfs with accounting such as tmpfs has, to allow
    it to support non-0 "df". We could have done so years ago; but have
    always preferred to leave ramfs as minimal, than import tmpfs features
    into it one by one.

    I prefer Rob's approach of making tmpfs usable for rootfs.

    Hugh


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