netdev - Re: [PATCH] net: Use __this_cpu

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <20100531.003007.112615604.davem@davemloft.net>
Date:	Mon, 31 May 2010 00:30:07 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH] net: Use __this_cpu_inc() in fast path

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 20 May 2010 10:07:23 +0200

> This patch saves 224 bytes of text on my machine.
> 
> __this_cpu_inc() generates a single instruction, using no scratch
> registers :
> 
>   65 ff 04 25 a8 30 01 00      incl   %gs:0x130a8
> 
> instead of :
> 
>   48 c7 c2 80 30 01 00         mov    $0x13080,%rdx
>   65 48 8b 04 25 88 ea 00 00   mov    %gs:0xea88,%rax
>   83 44 10 28 01               addl   $0x1,0x28(%rax,%rdx,1)
> 
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html