Re: [1/2] 2.6.22-rc5: known regressions with patches

Dave Jones
2007-06-20T23:09:42Z

On Wed, Jun 20, 2007 at 03:38:06PM -0700, Linus Torvalds wrote:

> And yes, that patch already got merged. However, the patch to *allow*
> Kprobes with DEBUG_RODATA is not, and will not be. It's not a regression,
> and quite frankly, I don't think I would even want that patch.
>
> Kprobes fundamntally disagrees with DEBUG_RODATA, there's no point in
> "working around it". Better just admit it.

Surely the fundamental disagreement is only due to DEBUG_RODATA
covering write-protection of both .text, and .rodata ?
I can see value in having a kernel that supports kprobes, whilst
at the same point, raising red flags if something writes into
a const string. With my distro kernel maintainer hat on, I always
hate these 'pick one' decisions, because I always get convincing
arguments from proponents of both sides.

Was it always this way? I thought DEBUG_RODATA initially just
covered, well.. rodata. And kprobes only wants to change .text
doesn't it ?

Dave

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