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| author | Michael Kerrisk <mtk.manpages@gmail.com> | 2015-04-24 11:03:50 +0200 |
|---|---|---|
| committer | Michael Kerrisk <mtk.manpages@gmail.com> | 2015-04-24 13:46:02 +0200 |
| commit | 2e10d8f65e865ab8d8d0b8488e1f15d636f7fdca (patch) | |
| tree | d58d38ad87836e1ebe3142f3099bb0af98b96aa4 /man7/bootparam.7 | |
| parent | af26ce0fabf61272c867eb4b349da2220fc2c670 (diff) | |
| download | man-pages-2e10d8f65e865ab8d8d0b8488e1f15d636f7fdca.tar.gz | |
bootparam.7: Remove crufty "mem=" details
The information here relates to ancient systems
Some (possibly more up to date) info can be found
in Documentation/kernel-parameters.txt.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Diffstat (limited to 'man7/bootparam.7')
| -rw-r--r-- | man7/bootparam.7 | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/man7/bootparam.7 b/man7/bootparam.7 index 8093462adf..73facdce2c 100644 --- a/man7/bootparam.7 +++ b/man7/bootparam.7 @@ -278,43 +278,6 @@ reserve=0x300,32 blah=0x300 keeps all device drivers except the driver for 'blah' from probing 0x300\-0x31f. .TP -.B "'mem=...'" -The BIOS call defined in the PC specification that returns -the amount of installed memory was designed only to be able -to report up to 64MB. -Linux uses this BIOS call at boot to -determine how much memory is installed. -If you have more than 64MB of -RAM installed, you can use this boot argument to tell Linux how much memory -you have. -The value is in decimal or hexadecimal (prefix 0x), -and the suffixes 'k' (times 1024) or 'M' (times 1048576) can be used. -Here is a quote from Linus on usage of the 'mem=' parameter. - -.in +0.5i -The kernel will accept any 'mem=xx' parameter you give it, and if it -turns out that you lied to it, it will crash horribly sooner or later. -The parameter indicates the highest addressable RAM address, so -\&'mem=0x1000000' means you have 16MB of memory, for example. -For a 96MB machine this would be 'mem=0x6000000'. - -.BR NOTE : -some machines might use the top of memory for BIOS -caching or whatever, so you might not actually have up to the full -96MB addressable. -The reverse is also true: some chipsets will map -the physical memory that is covered by the BIOS area into the area -just past the top of memory, so the top-of-mem might actually be 96MB -+ 384kB for example. -If you tell linux that it has more memory than -it actually does have, bad things will happen: maybe not at once, but -surely eventually. -.in - -You can also use the boot argument 'mem=nopentium' to turn off 4 MB -page tables on kernels configured for IA32 systems with a pentium or newer -CPU. -.TP .B "'panic=N'" By default, the kernel will not reboot after a panic, but this option will cause a kernel reboot after N seconds (if N is greater than zero). |