linux-kernel - [RFC 00/13] smp: reduce stack requirements for genapic send_IPI

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-next>] [day] [month] [year] [list]

Message-Id: <20080906235036.891970000@polaris-admin.engr.sgi.com>
Date:	Sat, 06 Sep 2008 16:50:36 -0700
From:	Mike Travis <travis@....com>
To:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	davej@...emonkey.org.uk, David Miller <davem@...emloft.net>,
	Eric Dumazet <dada1@...mosbay.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Jack Steiner <steiner@....com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Jes Sorensen <jes@....com>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: [RFC 00/13] smp: reduce stack requirements for genapic send_IPI_mask functions


[Note: all these changes require some more testing but I wanted to solicit
comments before then, hence the "RFC" in the subject line. -thanks! Mike]

  * Change the genapic->send_IPI_mask function to accept cpumask_t pointer.

  * Add for_each_online_cpu_mask_nr to eliminate a common case of needing
    a temporary on-stack cpumask_t variable.

  * Change send_IPI_mask function in xen to use for_each_online_cpu_mask_nr().

  * Add cpumask_ptr operations.

  * Add get_cpumask_var debug operations.

  * Add global allbutself PER_CPUMASK variable.

  * Remove as many on-stack cpumask_t variables in kernel/sched.c

  * Remove as many on-stack cpumask_t variables in acpi-cpufreq.c

  * Remove as many on-stack cpumask_t variables in io_apic.c


Applies to linux-2.6.tip/master.

Signed-off-by: Mike Travis <travis@....com>
---

-- 
--
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/