linux-kernel - Re: [PATCH] tracing/xen: Hide events that are not used when X86

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Date:   Tue, 10 Oct 2017 19:25:10 -0400
From:   Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:     Steven Rostedt <rostedt@...dmis.org>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     Ingo Molnar <mingo@...nel.org>, Juergen Gross <jgross@...e.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Jeremy Linton <jeremy.linton@....com>
Subject: Re: [PATCH] tracing/xen: Hide events that are not used when X86_PAE
 is not defined

On 10/10/2017 07:12 PM, Steven Rostedt wrote:
> From: Steven Rostedt (VMware) <rostedt@...dmis.org>
>
> TRACE_EVENTS() take up memory. If they are defined but not used, then
> they simply waste space. If their use case is behind a define, then the
> trace events should be as well.
>
> The trace events xen_mmu_set_pte_atomic, xen_mmu_pte_clear, and
> xen_mmu_pmd_clear are not used when CONFIG_X86_PAE is not defined.
>
> Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>

Reviewed-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>