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Message-ID: <20151028115825.GB29512@arm.com> Date: Wed, 28 Oct 2015 11:58:25 +0000 From: Will Deacon <will.deacon@....com> To: Steven Rostedt <rostedt@...dmis.org> Cc: Li Bin <huawei.libin@...wei.com>, catalin.marinas@....com, takahiro.akashi@...aro.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, guohanjun@...wei.com, dingtianhong@...wei.com, zhouchengming1@...wei.com Subject: Re: [PATCH] recordmcount: arm64: replace the ignored mcount call into nop On Wed, Oct 28, 2015 at 04:16:19AM -0400, Steven Rostedt wrote: > On Wed, 28 Oct 2015 16:04:05 +0800 > Li Bin <huawei.libin@...wei.com> wrote: > > > By now, the recordmcount only records the function that in > > following sections: > > .text/.ref.text/.sched.text/.spinlock.text/.irqentry.text/ > > .kprobes.text/.text.unlikely > > > > For the function that not in these sections, the call mcount > > will be in place and not be replaced when kernel boot up. And > > it will bring performance overhead, such as do_mem_abort (in > > .exception.text section). This patch make the call mcount to > > nop for this case in recordmcount. > > I can take this in my tree with an Ack from the ARM64 maintainers. Looks like it does what it says on the tin: Acked-by: Will Deacon <will.deacon@....com> Will -- 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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