linux-kernel - Re: [PATCH V2 Resend 4/4] timer: Migrate running timer

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]

Date:	Wed, 22 May 2013 11:06:43 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>, pjt@...gle.com,
	paul.mckenney@...aro.org, tj@...nel.org, mingo@...hat.com,
	Arvind.Chauhan@....com, linaro-dev@...ts.linaro.org,
	patches@...aro.org, pdsw-power-team@....com,
	linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org,
	john stultz <johnstul@...ibm.com>
Subject: Re: [PATCH V2 Resend 4/4] timer: Migrate running timer

On Wed, May 22, 2013 at 02:04:16PM +0530, Viresh Kumar wrote:

> So, this is the clean draft for the idea I had.. (Naming is poor for
> now):
> 
> diff --git a/include/linux/timer.h b/include/linux/timer.h
> index 8c5a197..ad00ebe 100644
> --- a/include/linux/timer.h
> +++ b/include/linux/timer.h
> @@ -20,6 +20,7 @@ struct timer_list {
> 
>         void (*function)(unsigned long);
>         unsigned long data;
> +       int wait_for_migration_to_complete;

If you play games with the alignment constraints of struct tvec_base you
can get extra low bits to play with for TIMER_FLAG_MASK. See struct
pool_workqueue for similar games.

That would avoid the struct bloat and I suppose make tglx happy :-)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/