Messages in this thread | | | Date | Tue, 25 Nov 2008 22:20:45 -0500 (EST) | From | Steven Rostedt <> | Subject | Re: [PATCH 1/1] ftrace: adding other non-leaving .text sections |
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On Wed, 26 Nov 2008, Paul Mundt wrote:
> On Tue, Nov 25, 2008 at 10:03:35PM -0500, Steven Rostedt wrote: > > > > On Wed, 26 Nov 2008, Liming Wang wrote: > > > > > Please review this patch, and I don't know whether new sections will conflict > > > with sched tracer or others. > > > This patch is against Steven tree's tip/devel latest commit. > > > > > > Impact: improve recordmcount.pl > > > > > > Besides .text section, there are three .text sections that won't > > > be freed after kernel booting. They are: .sched.text, .spinlock.text > > > and .kprobes.text, which contain functions we can trace. But the last > > > section ".kprobes.text" is particular, which has been marked as "notrace", > > > we ignore it. Thus we add other two sections. > > > > Yep, only those sections that we know will not disappear are OK. I was > > conservative with only using ".text" but I knew there were other sections > > that were OK, so I used the hash array to make it easy to add others. > > > Does your .text cover .text.head by the way?
No, you can add it if it is safe to trace, and it will not ever disappear.
-- Steve
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