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| author | Nathan Scott <nathans@sgi.com> | 2006-07-14 00:24:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-14 21:53:53 -0700 |
| commit | 086626a747300e37043a553dac639c5900c4a2c0 (patch) | |
| tree | 9aedfc36ef8fda99a83add9e92ce5f18c427528e /Documentation/ramdisk.txt | |
| parent | 22c4af4092fc2e037ce2e2922023fc222cf0c443 (diff) | |
| download | lwn-086626a747300e37043a553dac639c5900c4a2c0.tar.gz lwn-086626a747300e37043a553dac639c5900c4a2c0.zip | |
[PATCH] Update ramdisk documentation
The default ramdisk blocksize is actually 1024, not 512 bytes. Also fixes
up some trailing whitespace issues.
Signed-off-by: Nathan Scott <nathans@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/ramdisk.txt')
| -rw-r--r-- | Documentation/ramdisk.txt | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/Documentation/ramdisk.txt b/Documentation/ramdisk.txt index 7c25584e082c..52f75b7d51c2 100644 --- a/Documentation/ramdisk.txt +++ b/Documentation/ramdisk.txt @@ -6,7 +6,7 @@ Contents: 1) Overview 2) Kernel Command Line Parameters 3) Using "rdev -r" - 4) An Example of Creating a Compressed RAM Disk + 4) An Example of Creating a Compressed RAM Disk 1) Overview @@ -34,7 +34,7 @@ make it clearer. The original "ramdisk=<ram_size>" has been kept around for compatibility reasons, but it may be removed in the future. The new RAM disk also has the ability to load compressed RAM disk images, -allowing one to squeeze more programs onto an average installation or +allowing one to squeeze more programs onto an average installation or rescue floppy disk. @@ -51,7 +51,7 @@ default is 4096 (4 MB) (8192 (8 MB) on S390). =================== This parameter tells the RAM disk driver how many bytes to use per block. The -default is 512. +default is 1024 (BLOCK_SIZE). 3) Using "rdev -r" @@ -70,7 +70,7 @@ These numbers are no magical secrets, as seen below: ./arch/i386/kernel/setup.c:#define RAMDISK_PROMPT_FLAG 0x8000 ./arch/i386/kernel/setup.c:#define RAMDISK_LOAD_FLAG 0x4000 -Consider a typical two floppy disk setup, where you will have the +Consider a typical two floppy disk setup, where you will have the kernel on disk one, and have already put a RAM disk image onto disk #2. Hence you want to set bits 0 to 13 as 0, meaning that your RAM disk @@ -97,12 +97,12 @@ Since the default start = 0 and the default prompt = 1, you could use: append = "load_ramdisk=1" -4) An Example of Creating a Compressed RAM Disk +4) An Example of Creating a Compressed RAM Disk ---------------------------------------------- To create a RAM disk image, you will need a spare block device to construct it on. This can be the RAM disk device itself, or an -unused disk partition (such as an unmounted swap partition). For this +unused disk partition (such as an unmounted swap partition). For this example, we will use the RAM disk device, "/dev/ram0". Note: This technique should not be done on a machine with less than 8 MB |