linux-kernel - Re: [PATCH 3/8] IPMI: Run to completion fixes

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, 13 Feb 2008 15:20:18 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	minyard@....org
Cc:	linux-kernel@...r.kernel.org,
	openipmi-developer@...ts.sourceforge.net
Subject: Re: [PATCH 3/8] IPMI: Run to completion fixes

On Wed, 13 Feb 2008 10:23:42 -0600
Corey Minyard <minyard@....org> wrote:

> From: Corey Minyard <cminyard@...sta.com>
> 
> The "run_to_completion" mode was somewhat broken.  Locks need to be
> avoided in run_to_completion mode, and it shouldn't be used by normal
> users, just internally for panic situations.
> 
> This patch removes locks in run_to_completion mode and removes the
> user call for setting the mode.  The only user was the poweroff
> code, but it was easily converted to use the polling interface.
> 
> +	/*
> +	 * Spin until our message is done.
> +	 */
> +	while (atomic_read(&dummy_count) > 0) {
> +		ipmi_poll_interface(user);
> +		barrier();
> +	}

we'd normally use cpu_relax() here.


--
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/