Realtime kernel patch applying??

stratotak · 02-18-2009, 04:45 PM

Im trying to apply the realtime kernel patch.Foloowing hints from
http://rt.wiki.kernel.org/index.php/RT_PREEMPT_HOWTO
When I apply patch it gives me this option..

Code:

strat@frostbite:~/linux-2.6.28.1$ bzcat 2.6.28-rc2-mm1.bz2 | patch -p1 --dry-run
patching file Documentation/ABI/testing/debugfs-kmemtrace
The next patch would create the file Documentation/ABI/testing/sysfs-c2port,
which already exists!  Assume -R? [n]

I guess Im not sure what to choose..if i just enter..I get

Code:

Hunk #2 FAILED at 136.
Hunk #3 FAILED at 148.
2 out of 3 hunks FAILED -- saving rejects to file Documentation/DocBook/Makefile.rej
patching file Documentation/DocBook/deviceiobook.tmpl

If i choose -R and y for apply anyway I get same error

Code:

Hunk #1 FAILED at 1.
1 out of 1 hunk FAILED -- saving rejects to file Documentation/ABI/testing/sysfs-c2port.rej
patching file Documentation/Changes
patching file Documentation/DocBook/Makefile
Hunk #2 FAILED at 136.
Hunk #3 FAILED at 148.
2 out of 3 hunks FAILED -- saving rejects to file Documentation/DocBook/Makefile.rej
patching file Documentation/DocBook/deviceiobook.tmpl

Am I missing something..am I applying the patch wrong??

stratotak · 02-18-2009, 05:06 PM

I tried it another way..by extracting the patch first and then running patch like this

Code:

strat@frostbite:~/linux-2.6.28.1$ patch -p1 --dry-run <2.6.28-rc2-mm1
patching file Documentation/ABI/testing/debugfs-kmemtrace
The next patch would create the file Documentation/ABI/testing/sysfs-c2port,
which already exists!  Assume -R? [n]

But same errors

syg00 · 02-18-2009, 05:55 PM

Why are you applying an -mm patch at all ?. That's a -rc2-mm1, and so isn't intended to fit against 2.6.28.1
Have a read of ../Documentation/applying-patches.txt

Seems to me you should be getting the kernel source tree and the -rt patch(s) to line up - as in the wiki entry.

stratotak · 02-18-2009, 06:55 PM

I realized that now..I was using 64Studio and its realtime kernel is called multimedia..I thought thats what the mm stood for..I downloaded the RT patch ..but theres no RT patch for 2.6.28.
http://www.kernel.org/pub/linux/kernel/projects/rt/
.so im trying to patch 2.6.28.6 with the .2.6.29 patch so i can use the 2.6.29 RT patch..
So Ive got that part straight..but Im still runing into problems..

Code:

strat@frostbite:~/linux-2.6.28.6$ patch -p1 --dry-run < patch-2.6.29-rc5

But Im still running into some problems with it finding previous patches at giving me hunk failures..

Code:

patching file arch/alpha/include/asm/swab.h
patching file arch/alpha/include/asm/topology.h
patching file arch/alpha/kernel/.gitignore
patching file arch/alpha/kernel/Makefile
patching file arch/alpha/kernel/asm-offsets.c
patching file arch/alpha/kernel/binfmt_loader.c
patching file arch/alpha/kernel/core_marvel.c
patching file arch/alpha/kernel/entry.S
Hunk #3 FAILED at 896.
Hunk #4 FAILED at 916.
2 out of 5 hunks FAILED -- saving rejects to file arch/alpha/kernel/entry.S.rej
patching file arch/alpha/kernel/init_task.c
patching file arch/alpha/kernel/irq.c
patching file arch/alpha/kernel/irq_srm.c
Reversed (or previously applied) patch detected!  Assume -R? [n]

Im applying the right patch to the right kernel source..Just not sure why Im getting hunk failures..
Ive tried googling linxu kernel patching..but nothing is ever mention about what Assume -R means or about hunk errors.

syg00 · 02-18-2009, 07:10 PM

Did you read that file I pointed you to (it's in your kernel source tree) ?.
Kernel patches can't just be slapped on as you see fit - they are desgined to go against particualr levels.
patch-2.6.29-rc5 will (successfully) patch the 2.6.28 kernel source - the patch will be cumulative. You are either going to have to download (and reverse) the patch-2.6.28.6, or just get the base 2.6.28 source tree.

stratotak · 02-18-2009, 08:24 PM

Ok..I got it worked out..was first time patching a kernel..Ive built 2-3 but never patched them.downloaded 2.6.28 then patched it with 2.6.29 rc 5..but after it patched fine I saw there was no realtime patch for 2.6.29.rc5..there was one for 2.6.29.rc4..so I reverted to older 2.6.26.8 as there is no Rt patch for 2.6.28 of any version and patched it with patch-2.6.26.8-rt16..patched fine..now Im building it..