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Message-ID: <4A9B92A0.7020009@cn.fujitsu.com> Date: Mon, 31 Aug 2009 17:06:40 +0800 From: Li Zefan <lizf@...fujitsu.com> To: Ingo Molnar <mingo@...e.hu> CC: Steven Rostedt <rostedt@...dmis.org>, Frederic Weisbecker <fweisbec@...il.com>, Tom Zanussi <tzanussi@...il.com>, Masami Hiramatsu <mhiramat@...hat.com>, LKML <linux-kernel@...r.kernel.org> Subject: Re: [PATCH] tracing/filters: Defer pred allocation Ingo Molnar wrote: > * Li Zefan <lizf@...fujitsu.com> wrote: > >> init_preds() allocates about 5392 bytes of memory (on x86_32) for >> a TRACE_EVENT. With my config, at system boot total memory occupied >> is: >> >> 5392 * (642 + 15) == 3459KB >> >> 642 == cat available_events | wc -l >> 15 == number of dirs in events/ftrace >> >> That's quite a lot, so we'd better defer memory allocation util >> it's needed, that's when filter is used. >> >> Signed-off-by: Li Zefan <lizf@...fujitsu.com> > > Applied, thanks! > >> tracing/kprobe needs rebase after this patch.. > > You mean with many probes registered it has a lot of memory I think so, if filter is used. > footprint? Instead of a rebase a merge of tracing/core into > tracing/kprobes would be less intrusive. > Yeah, I meant this patch conflicts with some patches in tracing/kprobe. :) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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