Re: [PATCH] powerpc: tracing: don't trace hcalls on offline CPUs
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2015-11-22 23:36:04
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On Fri, 2015-11-20 at 15:22 +0300, Denis Kirjanov wrote:
On 11/3/15, Denis Kirjanov [off-list ref] wrote:quoted
On 11/3/15, Michael Ellerman [off-list ref] wrote:quoted
On Thu, 2015-10-29 at 22:10 +0300, Denis Kirjanov wrote:quoted
./drmgr -c cpu -a -r gives the following warning: [ 2327.035563] RCU used illegally from offline CPU! Make the hypervisor tracepoints conditional by introducing TRACE_EVENT_FN_COND similar to TRACE_EVENT_FNWe've fixed other cases like this with RCU_NONIDLE(), but I assume that doesn't work here because we're actually offline?Yes, in this case we're moving the complete core offline through dlpar...Hi Michael, Could you pick this patch?
It's mostly a tracing patch, so I'd need an ACK from Steve at least. It would probably be best if you split it into a "tracing: .. " patch which adds the new macros and then a powerpc patch which uses them. cheers