Re: [PATCH] use tmpfs for rootfs v3
From: Mike Frysinger
Date: Sun Oct 19 2008 - 14:13:04 EST
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-184.108.40.206-numlock/fs/Kconfig 2008-10-10 13:18:34.000000000 +0200
> +++ linux-220.127.116.11-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
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