linux-kernel - Re: [Uclinux-dist-devel] [RFC PATCH] percpu: always align percpu output section to PAGE

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]

Message-ID: <AANLkTi=WWCPJeQ8DVv1j7GF0J61DiUupiOEuxDCW8_Xd@mail.gmail.com>
Date:	Thu, 24 Mar 2011 02:46:01 -0400
From:	Mike Frysinger <vapier@...too.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	torvalds@...l.org, Alexander van Heukelum <heukelum@...tmail.fm>,
	linux-am33-list@...hat.com,
	user-mode-linux-devel@...ts.sourceforge.net,
	Jeff Dike <jdike@...toit.com>, linux-kernel@...r.kernel.org,
	David Howells <dhowells@...hat.com>,
	Mark Salter <msalter@...hat.com>,
	uclinux-dist-devel@...ckfin.uclinux.org, akpm@...ux-foundation.org,
	Ingo Molnar <mingo@...e.hu>,
	Akira Takeuchi <takeuchi.akr@...panasonic.com>
Subject: Re: [Uclinux-dist-devel] [RFC PATCH] percpu: always align percpu
 output section to PAGE_SIZE

On Tue, Oct 26, 2010 at 10:06, Tejun Heo wrote:
> The linker script macros PERCPU_VADDR() and PERCPU() are used to
> define this output section and the latter takes @align parameter.
> Several architectures are using @align smaller than PAGE_SIZE breaking
> percpu memory alignment.

hmm, i just pushed through a fix in the Blackfin tree as we hit a boot
failure otherwise:
-   PERCPU(4)
+   PERCPU(PAGE_SIZE)

> This patch removes @align parameter from PERCPU(), renames it to
> PERCPU_SECTION and makes it always align to PAGE_SIZE.  While at it,
> add PCPU_SETUP_BUG_ON() checks such that alignment problems are
> reliably detected and remove percpu alignment comment recently added
> in workqueue.c as the condition would trigger BUG way before reaching
> there.

seems this still hasnt made it to mainline.  has it stalled or
something ?  feel free for the Blackfin bits:
Signed-off-by: Mike Frysinger <vapier@...too.org>
-mike
--
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/