From: David Miller <davem@davemloft.net>
To: dhowells@redhat.com
Cc: cl@linux.com, tj@kernel.org, akpm@linuxfoundation.org,
netdev@vger.kernel.org, linux-arch@vger.kernel.org,
srostedt@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [guv v2 04/31] net: Replace __get_cpu_var uses
Date: Mon, 02 Sep 2013 20:33:55 -0700 (PDT) [thread overview]
Message-ID: <20130902.203355.117341085023152754.davem@davemloft.net> (raw)
In-Reply-To: <7435.1378157706@warthog.procyon.org.uk>
From: David Howells <dhowells@redhat.com>
Date: Mon, 02 Sep 2013 22:35:06 +0100
> Would it be possible to use __thread annotations for per-CPU
> variables, I wonder?
Paul Mackerras tried it on powerpc and you can't do it.
The problem is that there is no way to tell the compiler that sched()
and similar (potentially) change the thread pointer base.
It really will cache pre-computed __thread pointer calculations across
sched().
next prev parent reply other threads:[~2013-09-03 3:33 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20130826204351.725357339@linux.com>
2013-08-26 20:44 ` [guv v2 02/31] percpu: Make __verify_pcu_ptr handle per cpu pointers to arrays Christoph Lameter
2013-08-26 20:44 ` [guv v2 03/31] Coccinelle script for __get_cpu_var conversion Christoph Lameter
2013-08-26 20:44 ` [guv v2 05/31] time: Replace __get_cpu_var uses Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 04/31] net: " Christoph Lameter
2013-08-26 20:44 ` [guv v2 06/31] scheduler: " Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 09/31] block: " Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 08/31] tracing: " Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-28 19:48 ` Steven Rostedt
2013-08-29 3:44 ` Masami Hiramatsu
2013-08-29 3:44 ` Masami Hiramatsu
2013-08-29 16:35 ` Christoph Lameter
2013-08-30 7:00 ` Ingo Molnar
2013-08-26 20:44 ` [guv v2 11/31] percpu: " Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 07/31] mm: " Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 10/31] rcu: " Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 13/31] kernel misc: " Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 14/31] drivers: " Christoph Lameter
2013-08-26 20:44 ` [guv v2 12/31] watchdog: " Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 18/31] s390: " Christoph Lameter
2013-08-28 6:27 ` Heiko Carstens
2013-08-26 20:44 ` [guv v2 16/31] x86: " Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 17/31] mips: " Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 15/31] zcache/zsmalloc: " Christoph Lameter
2013-08-26 20:44 ` [guv v2 19/31] ia64: " Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 01/31] x86: Use this_cpu_inc/dec for debug registers Christoph Lameter
2013-08-26 20:44 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 20/31] powerpc: Replace __get_cpu_var uses Christoph Lameter
2013-08-27 8:44 ` Geert Uytterhoeven
2013-08-27 8:44 ` Geert Uytterhoeven
2013-08-27 15:37 ` Christoph Lameter
2013-08-26 20:44 ` [guv v2 21/31] sparc: " Christoph Lameter
2013-08-26 20:44 ` [guv v2 22/31] arm: " Christoph Lameter
2013-08-27 9:41 ` Catalin Marinas
2013-08-26 20:56 ` [guv v2 25/31] avr32: " Christoph Lameter
2013-08-27 6:58 ` Hans-Christian Egtvedt
2013-08-27 6:58 ` Hans-Christian Egtvedt
2013-08-26 20:56 ` [guv v2 23/31] tile: " Christoph Lameter
2013-08-26 20:56 ` Christoph Lameter
2013-08-26 22:22 ` Chris Metcalf
2013-08-27 14:48 ` Christoph Lameter
2013-08-28 17:19 ` Chris Metcalf
2013-08-28 17:54 ` Christoph Lameter
2013-08-28 18:13 ` Chris Metcalf
2013-08-28 18:22 ` Christoph Lameter
2013-08-30 16:01 ` Chris Metcalf
2013-08-26 20:56 ` [guv v2 29/31] parisc: " Christoph Lameter
2013-08-26 21:16 ` [guv v2 24/31] blackfin: " Christoph Lameter
2013-08-26 21:16 ` [guv v2 31/31] Remove __get_cpu_var and __raw_get_cpu_var macros Christoph Lameter
2013-08-26 21:16 ` [guv v2 26/31] alpha: Replace __get_cpu_var Christoph Lameter
2013-08-26 21:16 ` Christoph Lameter
2013-08-26 21:56 ` [guv v2 28/31] arc: Replace __get_cpu_var uses throughout the kernel Christoph Lameter
[not found] ` <521C2A9F.3070400@synopsys.com>
[not found] ` <00000140c05d28b7-f0a2bc86-fe85-40f7-b627-32664cd616a4-000000@email.amazonses.com>
2013-08-28 4:24 ` Vineet Gupta
2013-08-28 13:46 ` Christoph Lameter
2013-08-26 21:56 ` [guv v2 30/31] metag: Replace __get_cpu_var uses Christoph Lameter
2013-08-26 21:56 ` Christoph Lameter
2013-08-27 9:53 ` James Hogan
2013-08-26 21:56 ` [guv v2 27/31] sh: Replace __get_cpu_var uses throughout the kernel Christoph Lameter
2013-09-02 21:35 ` [guv v2 04/31] net: Replace __get_cpu_var uses David Howells
2013-09-03 3:33 ` David Miller [this message]
2013-09-03 3:33 ` David Miller
2013-09-03 14:21 ` Christoph Lameter
2013-09-03 14:20 ` Christoph Lameter
2013-09-03 20:39 ` David Howells
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