Syslinux - Nov 2003 - ramdisk_size

Hey All,

 I'am using pxelinux to try and boot a 200meg uncompressed (approx 50 
compressed) ramdisk onto a machine with 512meg of ram. It looks as though 
I'am running out of memory (attempt to access beyond end of device error). 
Is there a limit on what we put for ramdisk_size? Or Is there other
limitations?

thanks


-- 
Jeff Geddes, BSc(UNB)
Computer Systems Specialist
University of New Brunswick
Faculty of Computer Science
eMail: jgeddes at unb.ca
office: Rm. E119
phone : (506) 452-6102
fax   : (506) 453-3566

Geddes wrote:
> Hey All,
> 
>  I'am using pxelinux to try and boot a 200meg uncompressed (approx 50 
> compressed) ramdisk onto a machine with 512meg of ram. It looks as though 
> I'am running out of memory (attempt to access beyond end of device
error).
> Is there a limit on what we put for ramdisk_size? Or Is there other
> limitations?
> 
In general, once you get in the realm where the initrd
compressed+uncompressed > RAM/2 you're starting to see various kind of
weirdness.

The best way to avoid this is to bootstrap: load a small initrd which
gets the rest of the filesystem and puts it into a tmpfs.

	-hpa

Hi,

you can also try the ramdisk_size kernel parameter (200 MB = 204800 kB). 
Simply put it in the APPEND line. It should look something like this:
	APPEND root=/dev/ram ramdisk_size=204800 initrd=initrd.img

The default ramdisk size in the kernel equals to 4096 kB and I also ran in
some
trouble with this. 
I hope that works for you,

Thomas

............................................................................
...
"Only wimps use tape backup: real men just upload their important stuff on
FTP,
 and let the rest of the world mirror it."
      -- Linus Torvalds


-----Original Message-----
From: syslinux-bounces at zytor.com [mailto:syslinux-bounces at zytor.com]On
Behalf Of Geddes
Sent: Montag, 10. November 2003 22:42
To: syslinux at zytor.com
Subject: [syslinux] ramdisk_size



Hey All,

 I'am using pxelinux to try and boot a 200meg uncompressed (approx 50 
compressed) ramdisk onto a machine with 512meg of ram. It looks as though 
I'am running out of memory (attempt to access beyond end of device error). 
Is there a limit on what we put for ramdisk_size? Or Is there other
limitations?

thanks


-- 
Jeff Geddes, BSc(UNB)
Computer Systems Specialist
University of New Brunswick
Faculty of Computer Science
eMail: jgeddes at unb.ca
office: Rm. E119
phone : (506) 452-6102
fax   : (506) 453-3566


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