linux-kernel - Re: [net-next PATCH v2 5/8] net: Track start of busy loop instead of when it should end

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Message-ID: <1490330296.9687.39.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Thu, 23 Mar 2017 21:38:16 -0700
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Alexander Duyck <alexander.duyck@...il.com>
Cc:     Netdev <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Samudrala, Sridhar" <sridhar.samudrala@...el.com>,
        Eric Dumazet <edumazet@...gle.com>,
        David Miller <davem@...emloft.net>,
        Linux API <linux-api@...r.kernel.org>
Subject: Re: [net-next PATCH v2 5/8] net: Track start of busy loop instead
 of when it should end

On Thu, 2017-03-23 at 21:27 -0700, Eric Dumazet wrote:

> If you believe min/max values should be added to the sysctls, because we
> do not trust root anymore, please send patches only addressing that. 

extern unsigned int sysctl_net_busy_read;
extern unsigned int sysctl_net_busy_poll;
...
unsigned int            sk_ll_usec;


These are unsigned values, so no min/max would be required, only
maybe use proc_douintvec() instead of proc_dointvec() as most sysctls
use because we were lazy and had to wait linux-4.8 to actually get
proc_douintvec() in the kernel ;)