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| Started by | Catalin Marinas <catalin.marinas@arm.com> |
|---|---|
| First post | 2015-10-19 20:10 +0200 |
| Last post | 2015-10-19 20:10 +0200 |
| Articles | 1 — 1 participant |
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Re: [PATCH v3] arm64: Synchronise dump_backtrace() with perf callchain Catalin Marinas <catalin.marinas@arm.com> - 2015-10-19 20:10 +0200
| From | Catalin Marinas <catalin.marinas@arm.com> |
|---|---|
| Date | 2015-10-19 20:10 +0200 |
| Subject | Re: [PATCH v3] arm64: Synchronise dump_backtrace() with perf callchain |
| Message-ID | <qln2G-3Iv-3@gated-at.bofh.it> |
On Sat, Oct 17, 2015 at 02:28:11PM +0000, Jungseok Lee wrote: > Note that this patch does not cover a case where MMU is disabled. The > last stack frame of swapper, for example, has PC in a form of physical > address. Unfortunately, a simple conversion using phys_to_virt() cannot > cover all scenarios since PC is retrieved from LR - 4, not LR. It is > a big tradeoff to change both head.S and unwind_frame() for only a few > of symbols in *.S. Thus, this hunk does not take care of the case. That's fine, I think we can cope with a physical address as the last entry in the trace. Patch queued for 4.4. Thanks. -- Catalin -- 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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