<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> <META content="MSHTML 6.00.6000.16544" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY> <DIV><FONT face=Arial size=2>Hello, and thanks for reading this query.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I am trying to determine the best way to upgrade software on my target. For development we can a use the command line shell of our bootloader program, but we need the unit to auto-update in the production version. Currently, we TFTP the 2 files (kernel and filesystem) to ram, and then copy the ram files to the MTDs in flash. A reboot then brings us up on the new filesystem.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Apparently, the kernel and filesystem is expanded on-the-fly as needed by program operations into ram. So this is where I (think) I am running into a problem. Sometimes during the erase and programming of the MTDs, the target locks up; sometimes I get no warnings, sometimes I get </FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Courier size=2>    "Error -3 while decompressing!<BR>    94241eda(1899)->94657000(4096)"</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>To minimize the risk of loading code from the filesystem, I kill off the majority of the processes, although I am sure there are more I can kill. I don't think this is the answer to my problem.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>I am developing with a MIPS processor with MMU, Linux 2.6.10 kernel, compiled with UClibc, and BusyBox v1.2.2.</FONT></DIV> <DIV><FONT face=Arial size=2>My kernel is in mtd0, and mtd1 contains the filesystem, as CRAMFS.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>1.) What is the "right" way to update my file system and kernel?</FONT></DIV> <DIV><FONT face=Arial size=2>2.) Can I use switch_root or pivot_root to help this situation?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Thank you for your expert advice.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2> - Mike</FONT></DIV></BODY></HTML>