Messages in this thread | | | Date | Thu, 22 Mar 2018 14:10:22 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH] mm, vmscan, tracing: Use pointer to reclaim_stat struct in trace event |
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On Thu, 22 Mar 2018 12:10:03 -0400 Steven Rostedt <rostedt@goodmis.org> wrote:
> > The trace event trace_mm_vmscan_lru_shrink_inactive() currently has 12 > parameters! Seven of them are from the reclaim_stat structure. This > structure is currently local to mm/vmscan.c. By moving it to the global > vmstat.h header, we can also reference it from the vmscan tracepoints. In > moving it, it brings down the overhead of passing so many arguments to the > trace event. In the future, we may limit the number of arguments that a > trace event may pass (ideally just 6, but more realistically it may be 8).
Unfortunately this is not a good time. Andrey's "mm/vmscan: replace mm_vmscan_lru_shrink_inactive with shrink_page_list tracepoint" mucks with this code quite a lot and that patch's series is undergoing review at present, with a few issues yet unresolved.
I'll park your patch for now and if Andrey's series doesn't converge soon I'll merge this and will ask Andrey to redo things.
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