Hi all,

Does somebody know whether the CONFIG_LOGBUFFER functionality is supported by one of the available kernels on the git.denx.de server?

The problem is that the function setup_ext_logbuff_mem() is called by setup_ext_logbuff() but is nowhere defined.

Well, at least I was not able to find setup_ext_logbuff_mem() in the following kernels:

Kernel version 2.6.36 -rc 1 from http://git.denx.de/linux-2.6-denx.git

Kernel version 2.6.35 from http://git.denx.de/u-boot-linux-2.6-agust.git

Kernel version 2.4.27 -vrs1 from http://git.denx.de/linuxppc_2_4_devel.git

Asking google for help revealed that CONFIG_LOGBUFFER is broken since arch/ppc removal [1], but also that Grant Erickson proposed on January 2009 a patch which included the architecture support of this feature for arch/powerpc [2]. Afaik, Grant's patch was a proposal of adding the kernel feature of specifying an alternative, "external" buffer for kernel printk messages to the mainstream kernel. Although it did not success to be in the mainline kernel I am curious to know why is this functionality still broken in the DENX kernels? Is it only that nobody has it on its todo list, or are there some other reasons?

Many thanks for your response.

Regards,

Ondrej

[1] http://www.mail-archive.com/u-boot@lists.denx.de/msg16395.html [2] http://lkml.org/lkml/2009/1/21/250