netdev - Re: [PATCH][v2] xfrm: replace NR_CPU with nr_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] [thread-next>] [day] [month] [year] [list]

Message-ID: <20180619121755.3weaw5lsp4sho23r@gauss3.secunet.de>
Date:   Tue, 19 Jun 2018 14:17:55 +0200
From:   Steffen Klassert <steffen.klassert@...unet.com>
To:     Florian Westphal <fw@...len.de>
CC:     Li RongQing <lirongqing@...du.com>, <netdev@...r.kernel.org>
Subject: Re: [PATCH][v2] xfrm: replace NR_CPU with nr_cpu_ids

On Tue, Jun 19, 2018 at 09:53:49AM +0200, Florian Westphal wrote:
> Li RongQing <lirongqing@...du.com> wrote:
> > The default NR_CPUS can be very large, but actual possible nr_cpu_ids
> > usually is very small. For some x86 distribution, the NR_CPUS is 8192
> > and nr_cpu_ids is 4, so replace NR_CPU to save some memory
> 
> Steffen,
> 
> I will soon submit a patch to remove the percpu cache; removal
> improved performance for at least one user (and by quite a sizeable
> amount).
> 
> Would you consider such removal for ipsec or ipsec-next?

I think this removel would better fit to ipsec-next.

> If -next, consider applying this patch for ipsec.git.
> 
> Otherwise consider not applying this, as the code will go away soon.

This patch more an optimization than a fix, so I
considered to apply it to ipsec-next. If you plan
to remove it, I'll wait for that.