linux-kernel - Re: linux-next: build warning after merge of the rcu tree

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, 15 Jun 2022 06:55:32 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Frederic Weisbecker <frederic@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build warning after merge of the rcu tree

On Wed, Jun 15, 2022 at 03:38:02PM +1000, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the rcu tree, today's linux-next build (htmldocs) produced
> this warning:
> 
> Documentation/RCU/Design/Requirements/Requirements.rst:2220: WARNING: Malformed table.
> 
> +-----------------------------------------------------------------------+
> | **Quick Quiz**:                                                       |
> +-----------------------------------------------------------------------+
> | But what if my driver has a hardware interrupt handler that can run   |
> | for many seconds? I cannot invoke schedule() from an hardware         |
> | interrupt handler, after all!                                         |
> +-----------------------------------------------------------------------+
> | **Answer**:                                                           |
> +-----------------------------------------------------------------------+
> | One approach is to do ``ct_irq_exit();ct_irq_enter();`` every so    |
> | often. But given that long-running interrupt handlers can cause other |
> | problems, not least for response time, shouldn't you work to keep     |
> | your interrupt handler's runtime within reasonable bounds?            |
> +-----------------------------------------------------------------------+
> 
> Introduced by commit
> 
>   6c5218715286 ("context_tracking: Take IRQ eqs entrypoints over RCU")

Apologies and thank you, will fix.

							Thanx, Paul