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authorRandy Dunlap <randy.dunlap@oracle.com>2007-10-16 23:29:29 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-17 08:42:56 -0700
commit1810732e94576ae0d04e953ecaba8c7151c9a287 (patch)
treec2ff43ec67ea41d2e5fee33b5e9a0d828871d3b5 /Documentation/filesystems
parent0e1ccb9619e8e9ae86dfc5a4645ccf3bf5a2eb3f (diff)
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docs: ramdisk/initrd/initramfs corrections
initrd/initramfs/ramdisk docs: - fix typos/spellos/grammar - clarify RAM disk config location - correct cpio option Acked-by: Bryan O'Sullivan <bos@serpentine.com> Acked-by: Rob Landley <rob@landley.net> Cc: Werner Almesberger <werner@almesberger.net> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Acked-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r--Documentation/filesystems/ramfs-rootfs-initramfs.txt14
1 files changed, 7 insertions, 7 deletions
diff --git a/Documentation/filesystems/ramfs-rootfs-initramfs.txt b/Documentation/filesystems/ramfs-rootfs-initramfs.txt
index 25981e2..339c6a4 100644
--- a/Documentation/filesystems/ramfs-rootfs-initramfs.txt
+++ b/Documentation/filesystems/ramfs-rootfs-initramfs.txt
@@ -8,7 +8,7 @@ What is ramfs?
Ramfs is a very simple filesystem that exports Linux's disk caching
mechanisms (the page cache and dentry cache) as a dynamically resizable
-ram-based filesystem.
+RAM-based filesystem.
Normally all files are cached in memory by Linux. Pages of data read from
backing store (usually the block device the filesystem is mounted on) are kept
@@ -34,7 +34,7 @@ ramfs and ramdisk:
------------------
The older "ram disk" mechanism created a synthetic block device out of
-an area of ram and used it as backing store for a filesystem. This block
+an area of RAM and used it as backing store for a filesystem. This block
device was of fixed size, so the filesystem mounted on it was of fixed
size. Using a ram disk also required unnecessarily copying memory from the
fake block device into the page cache (and copying changes back out), as well
@@ -46,8 +46,8 @@ unnecessary work for the CPU, and pollutes the CPU caches. (There are tricks
to avoid this copying by playing with the page tables, but they're unpleasantly
complicated and turn out to be about as expensive as the copying anyway.)
More to the point, all the work ramfs is doing has to happen _anyway_,
-since all file access goes through the page and dentry caches. The ram
-disk is simply unnecessary, ramfs is internally much simpler.
+since all file access goes through the page and dentry caches. The RAM
+disk is simply unnecessary; ramfs is internally much simpler.
Another reason ramdisks are semi-obsolete is that the introduction of
loopback devices offered a more flexible and convenient way to create
@@ -103,7 +103,7 @@ All this differs from the old initrd in several ways:
initramfs archive is a gzipped cpio archive (like tar only simpler,
see cpio(1) and Documentation/early-userspace/buffer-format.txt). The
kernel's cpio extraction code is not only extremely small, it's also
- __init data that can be discarded during the boot process.
+ __init text and data that can be discarded during the boot process.
- The program run by the old initrd (which was called /initrd, not /init) did
some setup and then returned to the kernel, while the init program from
@@ -220,7 +220,7 @@ device) but the separate packaging of initrd (which is nice if you have
non-GPL code you'd like to run from initramfs, without conflating it with
the GPL licensed Linux kernel binary).
-It can also be used to supplement the kernel's built-in initamfs image. The
+It can also be used to supplement the kernel's built-in initramfs image. The
files in the external archive will overwrite any conflicting files in
the built-in initramfs archive. Some distributors also prefer to customize
a single kernel image with task-specific initramfs images, without recompiling.
@@ -339,7 +339,7 @@ smooth transition and allowing early boot functionality to gradually move to
The move to early userspace is necessary because finding and mounting the real
root device is complex. Root partitions can span multiple devices (raid or
separate journal). They can be out on the network (requiring dhcp, setting a
-specific mac address, logging into a server, etc). They can live on removable
+specific MAC address, logging into a server, etc). They can live on removable
media, with dynamically allocated major/minor numbers and persistent naming
issues requiring a full udev implementation to sort out. They can be
compressed, encrypted, copy-on-write, loopback mounted, strangely partitioned,