Re: Question on RAMDISK
On 07/05/2010 05:52 AM, rohan tabish wrote: Hello everyone I am using a ramdisk image to boot the system its takes around 7secs to copy the ramdisk image from the flash to the RAM and then takes 3.6 seconds after kernal uncompressing to the linux prompt Reduce your RAMDISK size. Maybe use two partitions, one that is CRAMFS and another that is RAMDISK. I want to know that how to reduce this time of 7seconds. Also can anyone tell how to update the ramdisk image from the linux prompt.e.g if i have created a file and now iwant it at the next boot then how to make this file part of the old ramdisk image How about booting the system quickly with CRAMFS, with a JFFS2 filesystem that is smaller and a RAM disk to match the JFFS2. At startup, you can mount the JFFS2 (hidden mount point) and RAM disk, copy the JFFS2 contents to RAM, then on shutdown, copy it back. Regard's RT ___ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ___ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
Re: Question on RAMDISK
2010/7/5 rohan tabish rohan_ja...@yahoo.co.uk Hello everyone I am using a ramdisk image to boot the system its takes around 7secs to copy the ramdisk image from the flash to the RAM and then takes 3.6 seconds after kernal uncompressing to the linux prompt I want to know that how to reduce this time of 7seconds. you can use, if not already done, cp.l and not cp.b and divide the lenght to copy by 4. Also can anyone tell how to update the ramdisk image from the linux prompt.e.g if i have created a file and now iwant it at the next boot then how to make this file part of the old ramdisk image Regard's RT ___ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source -- www.opensurf.it ___ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
Re: question on RAMDISK
Il 01/02/10 22.49, Naresh Kansara ha scritto: Hello All, I have two questions. 1. Is there a limit of 32MB on Ramdisk? I tried to use 64MB size and I got some errors I don't know, but maybe you're running out of memory 2. Has anybody tried to use two RAMDISK? If yes how to use two ramdisk? what I do is booting and mounting the rootfs on a ramdisk and successively I can mount in tmp a tmpfs volume. ___ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
RE: question on RAMDISK
Hi kirthika, Thank you for your response. From Kernel my RAMDISK size is 4M.. configuring RAMDISK size to 32M through setenv command works, but size to 64M Fails. Once I get the DVEVM prompt, I issue a command setenv bootargs mem=120M console=ttyS0,115200n8 root=/dev/ram0 rw init=/bin/ash initrd=0x8200,32M-- after following normal bootcmd, boots correctly But the following procedure fails with message setenv bootargs mem=120M console=ttyS0,115200n8 root=/dev/ram0 rw init=/bin/ash initrd=0x8200,64M -- After this I load the ramdisk through loadb 0x8200 command through Kermit. After that when I try to setenv bootcmd 'nboot 8070 0 206; bootm' boot Command But this fails with message Division by zero in kernel Any help will be highly appreciated. I need bigger size ramdisk, if there is way to partition in two ramdisk also will work. Thanks and Regards, Naresh Naresh Kansara Irvine Sensors Corporation phone: (714)-435-8928 email: nkans...@irvine-sensors.com --- From: kirthika varadarajan [mailto:kirthikai...@gmail.com] Sent: Monday, February 01, 2010 7:07 PM To: Naresh Kansara Subject: Re: question on RAMDISK Hi Please check out kernel configuration. Give make menuconfig Go to Device Drivers - Block devices- Default RAM Disk Size Check out the size here. On Tue, Feb 2, 2010 at 3:19 AM, Naresh Kansara nkans...@irvine-sensors.com wrote: Hello All, I have two questions. 1. Is there a limit of 32MB on Ramdisk? I tried to use 64MB size and I got some errors 2. Has anybody tried to use two RAMDISK? If yes how to use two ramdisk? Thank you for your help. Regards, Naresh Naresh Kansara Irvine Sensors Corporation phone: (714)-435-8928 email: nkans...@irvine-sensors.com ___ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source ___ Davinci-linux-open-source mailing list Davinci-linux-open-source@linux.davincidsp.com http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
