It Doesn't Look Like That New In-Kernel Debugger Will Be Added For Linux 4.6
Written by Michael Larabel in Linux Kernel on 25 March 2016 at 08:01 AM EDT. Add A Comment
LINUX KERNEL --
At the start of the merge window there was a proposal to land an in-kernel debugger with full x86/x86_64 disassembler support even though KDB/KGDB exists already. We're nearing the end of the merge window and Linus Torvalds so far has decided not to pull this MDB debugger as other kernel developers are also objecting.

Jeffrey Merkey, the lead developer of the MDB Linux Kernel Debugger, was on the mailing list a few days back trying to get MDB added to Linux-Next if Linus Torvalds doesn't accept the debugger for Linux 4.6. However, the Linux-Next maintainer first would need some ongoing kernel maintainer to ask for it to be added rather than Jeff along with some notice of when the code might be ready for merging into the kernel.

Kernel developer Ingo Molnar has come out today actively against the MDB debugger on the LKML thread, "So neither the x86 nor other affected maintainers have acked these changes or have agreed to merge it - in fact there are outstanding NAKs against this tree, which were not mentioned in the pull request. Here's one of the objections by me...which technical objections were replied to by Jeff Merkey by accusing me of trolling...So this tree is very far from being ready and I'm not convinced we want to merge it in its current form."

Ingo Molnar also went on to say he'd rather see improvements to the kernel's KDB debugger rather than the MDB debugger. Ingo believes all functionality provided by MDB could be added to KDB/KGDB and that would be the better solution.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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