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SubjectRe: [PATCH] use tmpfs for rootfs v3
On Fri, Oct 17, 2008 at 07:16, Bodo Eggert wrote:
> This patch allows chosing tmpfs instead of ramfs for the root filesystem.
> Having tmpfs is usefull for running systems from RAM, because it does not
> risk deadlocking the system and possibly allows swapping. Using tmpfs
> increases the kernel by 10 bytes on x86_64.

great option, thanks

> --- linux-2.6.27.2-numlock/fs/Kconfig 2008-10-10 13:18:34.000000000 +0200
> +++ linux-2.6.27.3-tmpfs/fs/Kconfig 2008-10-11 15:42:21.000000000 +0200
> @@ -953,6 +953,27 @@ config TMPFS_POSIX_ACL
>
> If you don't know what Access Control Lists are, say N.
>
> +config TMPFS_ROOT
> + bool "Use tmpfs instrad of ramfs for initramfs"
> + depends on TMPFS && SHMEM
> + default n
> + help
> + This replaces the ramfs used for unpacking the cpio images
> + with tmpfs.
> +
> + If unsure, say N

this should be init/Kconfig and depend on BLK_DEV_INITRD i think. and
then update the comment to talk about the initial filesystem rather
than cpio images.

> +config RAMFS
> + bool "Ramfs file system support" if TMPFS_ROOT

if you have initramfs support disabled, then you should be able to
disable RAMFS as well. so perhaps the depend should read like:
if BLK_DEV_INITRD && TMPFS_ROOT || !BLK_DEV_INITRD
-mike


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