linux-kernel - Re: [PATCH] seq_file: delete small-value optimization

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]

Date:   Wed, 17 May 2017 00:11:40 -0700
From:   Joe Perches <joe@...ches.com>
To:     Alexey Dobriyan <adobriyan@...il.com>, akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] seq_file: delete small-value optimization

On Tue, 2017-05-16 at 23:42 +0300, Alexey Dobriyan wrote:
> num_to_str() optimizes printing small integers [0..9], so the same
> check higher in callchain is unnecessary.

Doesn't the optimization exists for the frequent use of 0
in seq output?  

These seq_put_decimal calls are now slightly more expensive.