netdev - Re: [PATCH net-next] net: sched: Allow statistics reads from softirq.

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:   Tue, 19 Oct 2021 12:10:08 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     eric.dumazet@...il.com, netdev@...r.kernel.org,
        netfilter-devel@...r.kernel.org, kuba@...nel.org,
        davem@...emloft.net, pablo@...filter.org, kadlec@...filter.org,
        fw@...len.de, jhs@...atatu.com, xiyou.wangcong@...il.com,
        jiri@...nulli.us, a.darwish@...utronix.de, edumazet@...gle.com,
        tglx@...utronix.de
Subject: Re: [PATCH net-next] net: sched: Allow statistics reads from softirq.

Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller <davem@...emloft.net>:

On Tue, 19 Oct 2021 12:12:04 +0200 you wrote:
> Eric reported that the rate estimator reads statics from the softirq
> which in turn triggers a warning introduced in the statistics rework.
> 
> The warning is too cautious. The updates happen in the softirq context
> so reads from softirq are fine since the writes can not be preempted.
> The updates/writes happen during qdisc_run() which ensures one writer
> and the softirq context.
> The remaining bad context for reading statistics remains in hard-IRQ
> because it may preempt a writer.
> 
> [...]

Here is the summary with links:
  - [net-next] net: sched: Allow statistics reads from softirq.
    https://git.kernel.org/netdev/net-next/c/e22db7bd552f

You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html