Re: [PATCH 3/4] sparc: bpf_jit: Avoid assignment for "flen" if BPF JIT is disabled

From	Daniel Borkmann <daniel@iogearbox.net>
Newsgroups	linux.kernel
Subject	Re: [PATCH 3/4] sparc: bpf_jit: Avoid assignment for "flen" if BPF JIT is disabled
Date	2016-09-03 19:00 +0200
Message-ID	<sdmsp-7NH-11@gated-at.bofh.it> (permalink)
References	<qEuGl-43C-5@gated-at.bofh.it> <sdm93-7Hd-19@gated-at.bofh.it> <sdmiK-7Ks-13@gated-at.bofh.it>
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On 09/03/2016 06:40 PM, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@users.sourceforge.net>
> Date: Sat, 3 Sep 2016 18:00:03 +0200
>
> Move the assignment for the local variable "flen" a bit at the beginning
> so that it will only be performed if BPF JIT is enabled for this function.
>
> Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>

Why is that a particular issue (did you measure some improvement when
you say "fine-tuning" as per subject) ?

That's all not in critical path here by the way, same for patch 2.

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[PATCH 0/4] sparc: bpf_jit: Fine-tuning for bpf_jit_compile() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-09-03 18:40 +0200
  [PATCH 1/4] sparc: bpf_jit: Use kmalloc_array() in bpf_jit_compile() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-09-03 18:40 +0200
    Re: [PATCH 1/4] sparc: bpf_jit: Use kmalloc_array() in bpf_jit_compile() Daniel Borkmann <daniel@iogearbox.net> - 2016-09-03 19:00 +0200
  [PATCH 4/4] sparc: bpf_jit: Rename jump labels in bpf_jit_compile() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-09-03 18:50 +0200
    Re: [PATCH 4/4] sparc: bpf_jit: Rename jump labels in bpf_jit_compile() Daniel Borkmann <daniel@iogearbox.net> - 2016-09-03 19:00 +0200
      Re: [PATCH 4/4] sparc: bpf_jit: Rename jump labels in  bpf_jit_compile() David Miller <davem@davemloft.net> - 2016-09-04 08:20 +0200
        Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-09-04 09:00 +0200
          Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() David Miller <davem@davemloft.net> - 2016-09-04 09:00 +0200
            Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-09-04 09:40 +0200
              Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() David Miller <davem@davemloft.net> - 2016-09-04 09:40 +0200
                Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() SF Markus Elfring <elfring@users.sourceforge.net> - 2016-09-04 09:50 +0200
              Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() Daniel Borkmann <daniel@iogearbox.net> - 2016-09-04 12:00 +0200
                Re: Clarification for source code formatting around jump labels SF Markus Elfring <elfring@users.sourceforge.net> - 2016-09-04 16:00 +0200
                Re: Clarification for source code formatting around jump labels Daniel Borkmann <daniel@iogearbox.net> - 2016-09-04 19:40 +0200
                Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() Jean Delvare <jdelvare@suse.de> - 2016-09-05 13:10 +0200
                Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() Peter Zijlstra <peterz@infradead.org> - 2016-09-05 13:40 +0200
                Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() Peter Zijlstra <peterz@infradead.org> - 2016-09-05 14:00 +0200
                Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() Jean Delvare <jdelvare@suse.de> - 2016-09-06 16:40 +0200
                Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() Peter Zijlstra <peterz@infradead.org> - 2016-09-06 16:50 +0200
                Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() Joe Perches <joe@perches.com> - 2016-09-06 17:30 +0200
                Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() Jean Delvare <jdelvare@suse.de> - 2016-09-07 14:40 +0200
                Re: sparc: bpf_jit: Rename jump labels in bpf_jit_compile() Jean Delvare <jdelvare@suse.de> - 2016-09-05 14:00 +0200
  [PATCH 3/4] sparc: bpf_jit: Avoid assignment for "flen" if BPF JIT is  disabled SF Markus Elfring <elfring@users.sourceforge.net> - 2016-09-03 18:50 +0200
    Re: [PATCH 3/4] sparc: bpf_jit: Avoid assignment for "flen" if BPF  JIT is disabled Daniel Borkmann <daniel@iogearbox.net> - 2016-09-03 19:00 +0200

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