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--- soc:2009:pravin:journal:probsbkoromomatic [2009/06/09 21:41]
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+++ soc:2009:pravin:journal:probsbkoromomatic [2009/06/10 13:44] (current)
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@@ Line 1: / Line 1: @@
 ====== Integreting BKO with latest gpxe and rom-o-matic ======
-The latest gpxe code, and gpxe version used by rom-o-matic, both are creating trubble while booting.
+The latest gpxe code, and gpxe version used by rom-o-matic, both are creating trubble while booting.\\
+I am hosting them at [[http://etherboot.org/share/pravin/BKO/rom-o-matic/]]
 Following is the error thrown.
 <code>
+$qemu -fda gpxe-git-rtl8139.dsk -net nic,model=rtl8139 -net user
+...
+...
+...
+PXELINUX 3.80 2009-05004 Copyright(C) 1994-2009 H. Peter Anvin et al
 !PXE entry point found (we hope) at 9C79:039E via plan A.
 UNDI code segment at 9C79 len 0794
@@ Line 11: / Line 17: @@
 Boot failed: press any key to retry, or wait for reset........
 </code>
+I am not sure if this problem is from gpxe or from pxelinux. My guess is that, it should be gpxe problem
+as same setup is working fine with my version of gpxe code.\\
+all my modifications are listed on page [[pxekniferomomatic]]
+===== Error Location =====
+Problem should be because of latest gpxe code ///pub/share/pravin/gpxe.git//, because when I use the code which I normally use on my machine (which is copied on ///pub/share/pravin/gpxe//), it works fine.
+===== trying to see if networking works =====
+the location for problematic gpxe is
+<code>
+$ cd /pub/share/pravin/gpxe.git/src/
+$ git log
+commit 768fe5c032727f585e29834d427cb5fd4ff8d84e
+Merge: e957581... edfbd4e...
+Author: Marty Connor <mdc@etherboot.org>
+Date:   Thu Jun 4 20:20:03 2009 -0400
+    Merge branch 'master' of /pub/scm/gpxe
+commit edfbd4e4fa63ded7df7232d38cfeb16bc5662f6d
+Author: Michael Brown <mcb30@etherboot.org>
+Date:   Fri Jun 5 01:06:07 2009 +0100
+    [netdevice] Fix incorrect value for MAX_LL_HEADER_LEN
+    MAX_LL_HEADER_LEN is erroneously set to 6 rather than 14, resulting
+    in possible data corruption whenever we send an ARP packet.
+    Fix value and add a comment explaining why MAX_LL_ADDR_LEN is greater
+    than MAX_LL_HEADER_LEN.
+    Reported-by: Joshua Oreman <oremanj@rwcr.net>
+</code>
+and working gpxe is at
+<code>
+$ cd /pub/share/pravin/gpxe/src/
+$ git log
+commit f4bf4e69f797e3a93e02b51aae43af303bb94525
+Author: Michael Brown <mcb30@etherboot.org>
+Date:   Mon May 18 09:33:36 2009 +0100
+    [legal] Add FILE_LICENCE declaration to romprefix.S
+commit c44a193d0d147ed6f98741124569864e516e9d4b
+Author: Michael Brown <mcb30@etherboot.org>
+Date:   Fri May 1 15:41:06 2009 +0100
+    [legal] Add a selection of FILE_LICENCE declarations
+    Add FILE_LICENCE declarations to almost all files that make up the
+    various standard builds of gPXE.
+</code>
+Following command works in my old pxe, but does not work in trubbled pxe.
+<code>
+$ make bin/rtl8139.dsk
+$ qemu -fda bin/rtl8139.dsk -net nic,model=rtl8139 -net user -bootp http://etherboot.org/share/pravin/pxeDHCP.gpxe
+</code>
+===== Going one more level deeper =====
+Testing if generic network booting over http works or not by using  __-bootp [[http://etherboot.org/gtest/gtest.gpxe]]__
+<code>
+qemu -fda bin/rtl8139.dsk -net nic,model=rtl8139 -net user -bootp http://etherboot.org/gtest/gtest.gpxe
+</code>
+**This works for both problematic and good gpxe**
+So, the problem lies in transition from
+<code>
+qemu -fda bin/rtl8139.dsk -net nic,model=rtl8139 -net user -bootp http://etherboot.org/gtest/gtest.gpxe
+</code>
+to
+<code>
+qemu -fda bin/rtl8139.dsk -net nic,model=rtl8139 -net user -bootp http://etherboot.org/share/pravin/pxeDHCP.gpxe
+</code>
+===== The commit causing problem =====
+used git bisect to find the problematic commit.
+the test used to check if commit is correct or not is
+<code>
+make clean
+make bin/rtl8139.dsk
+qemu -fda bin/rtl8139.dsk -net nic,model=rtl8139 -net user -bootp http://etherboot.org/share/pravin/pxeDHCP.gpxe
+</code>
+Commit used as last known good commit is
+<code>
+git bisect good f4bf4e6
+</code>
+Following is the problematic commit.
+<code>
+$ git bisect bad
+c06277bbb6ea135e6a1daf22463a347fc7898c7 is first bad commit
+commit 3c06277bbb6ea135e6a1daf22463a347fc7898c7
+Author: Michael Brown <mcb30@etherboot.org>
+Date:   Tue May 26 11:05:58 2009 +0100
+    [settings] Allow for arbitrarily-named settings
+    This provides a mechanism for using arbitrarily-named variables within
+    gPXE, using the existing syntax for settings.
+:040000 040000 59221f26fc6a070c21fad5ca53329202425336ba 5aebb5cbcfe8c1aafa4679fd5938e12eb182c07b M	src
+</code>

Trace: • journal • dslbko • probsbkoromomatic

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