linux-kernel - Re: [PATCH 1/2] futex: eliminate cache miss from futex

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:	Mon, 22 Jun 2015 15:33:27 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Richard Weinberger <richard@....at>,
	Andy Lutomirski <luto@...capital.net>,
	Darren Hart <darren@...art.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] futex: eliminate cache miss from futex_hash()

On Mon, Jun 22, 2015 at 03:16:18PM +0200, Rasmus Villemoes wrote:
> +static struct {
> +	struct futex_hash_bucket *queues;
> +	unsigned long            hashsize;
> +} __futex_data __read_mostly __aligned(16);

Does: __aligned(sizeof(__futex_data)), work?

Because 16 might waste 8 bytes on 32bit.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
Please read the FAQ at  http://www.tux.org/lkml/