diff options
author | Nathan Scott <nathans@sgi.com> | 2006-07-14 03:24:10 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-07-15 00:53:53 -0400 |
commit | 086626a747300e37043a553dac639c5900c4a2c0 (patch) | |
tree | 9aedfc36ef8fda99a83add9e92ce5f18c427528e /Documentation/ramdisk.txt | |
parent | 22c4af4092fc2e037ce2e2922023fc222cf0c443 (diff) |
[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: | |||
6 | 1) Overview | 6 | 1) Overview |
7 | 2) Kernel Command Line Parameters | 7 | 2) Kernel Command Line Parameters |
8 | 3) Using "rdev -r" | 8 | 3) Using "rdev -r" |
9 | 4) An Example of Creating a Compressed RAM Disk | 9 | 4) An Example of Creating a Compressed RAM Disk |
10 | 10 | ||
11 | 11 | ||
12 | 1) Overview | 12 | 1) Overview |
@@ -34,7 +34,7 @@ make it clearer. The original "ramdisk=<ram_size>" has been kept around for | |||
34 | compatibility reasons, but it may be removed in the future. | 34 | compatibility reasons, but it may be removed in the future. |
35 | 35 | ||
36 | The new RAM disk also has the ability to load compressed RAM disk images, | 36 | The new RAM disk also has the ability to load compressed RAM disk images, |
37 | allowing one to squeeze more programs onto an average installation or | 37 | allowing one to squeeze more programs onto an average installation or |
38 | rescue floppy disk. | 38 | rescue floppy disk. |
39 | 39 | ||
40 | 40 | ||
@@ -51,7 +51,7 @@ default is 4096 (4 MB) (8192 (8 MB) on S390). | |||
51 | =================== | 51 | =================== |
52 | 52 | ||
53 | This parameter tells the RAM disk driver how many bytes to use per block. The | 53 | This parameter tells the RAM disk driver how many bytes to use per block. The |
54 | default is 512. | 54 | default is 1024 (BLOCK_SIZE). |
55 | 55 | ||
56 | 56 | ||
57 | 3) Using "rdev -r" | 57 | 3) Using "rdev -r" |
@@ -70,7 +70,7 @@ These numbers are no magical secrets, as seen below: | |||
70 | ./arch/i386/kernel/setup.c:#define RAMDISK_PROMPT_FLAG 0x8000 | 70 | ./arch/i386/kernel/setup.c:#define RAMDISK_PROMPT_FLAG 0x8000 |
71 | ./arch/i386/kernel/setup.c:#define RAMDISK_LOAD_FLAG 0x4000 | 71 | ./arch/i386/kernel/setup.c:#define RAMDISK_LOAD_FLAG 0x4000 |
72 | 72 | ||
73 | Consider a typical two floppy disk setup, where you will have the | 73 | Consider a typical two floppy disk setup, where you will have the |
74 | kernel on disk one, and have already put a RAM disk image onto disk #2. | 74 | kernel on disk one, and have already put a RAM disk image onto disk #2. |
75 | 75 | ||
76 | Hence you want to set bits 0 to 13 as 0, meaning that your RAM disk | 76 | 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: | |||
97 | append = "load_ramdisk=1" | 97 | append = "load_ramdisk=1" |
98 | 98 | ||
99 | 99 | ||
100 | 4) An Example of Creating a Compressed RAM Disk | 100 | 4) An Example of Creating a Compressed RAM Disk |
101 | ---------------------------------------------- | 101 | ---------------------------------------------- |
102 | 102 | ||
103 | To create a RAM disk image, you will need a spare block device to | 103 | To create a RAM disk image, you will need a spare block device to |
104 | construct it on. This can be the RAM disk device itself, or an | 104 | construct it on. This can be the RAM disk device itself, or an |
105 | unused disk partition (such as an unmounted swap partition). For this | 105 | unused disk partition (such as an unmounted swap partition). For this |
106 | example, we will use the RAM disk device, "/dev/ram0". | 106 | example, we will use the RAM disk device, "/dev/ram0". |
107 | 107 | ||
108 | Note: This technique should not be done on a machine with less than 8 MB | 108 | Note: This technique should not be done on a machine with less than 8 MB |