Messages in this thread | | | Date | Wed, 26 Nov 2008 11:14:38 +0800 | From | walimis <> | Subject | Re: [PATCH 1/1] ftrace: adding other non-leaving .text sections |
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On Wed, Nov 26, 2008 at 12:04:46PM +0900, 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, and not needed. Because .text.head is of booting code, to which function tracer can't trace.
walimis >-- >To unsubscribe from this list: send the line "unsubscribe linux-kernel" in >the body of a message to majordomo@vger.kernel.org >More majordomo info at http://vger.kernel.org/majordomo-info.html >Please read the FAQ at http://www.tux.org/lkml/
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