From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Andrew Morton <akpm@linux-foundation.org>,
Paul Mundt <paul.mundt@gmail.com>
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
Vineet Gupta <Vineet.Gupta1@synopsys.com>
Subject: [PATCH v2 0/3] Move ARCH specific fpu_counter out of task_struct
Date: Tue, 8 Oct 2013 13:16:26 +0530 [thread overview]
Message-ID: <1381218389-16585-1-git-send-email-vgupta@synopsys.com> (raw)
Hi,
When debugging a ARC SMP 3.11 build failure due to a ST insn dealing with
task_struct.thread going out of range, I spotted @fpu_counter in task_struct
which only SH/x86 happen to use, and can be easily moved out into corresponding
ARCH specific thread_struct. This saves 4 bytes per task_struct instantiated,
for all the other 18 arches.
While the change is relatively strightforward, I've failed to connect with
SH arch folks / Paul Mundt, latter's SH email keeps bouncing back.
Hence I'm taking the liberty to use his alternate email (as listed on his
github page) and I appologize in advance if this causes any inconvenience.
Changes in v2:
- Rabased to 3.12-rc4
- Added ACK from Ingo on patch 2/3
Version 1 can be found here:
https://lkml.org/lkml/2013/9/17/49
Thx,
-Vineet
Vineet Gupta (3):
sh: Move fpu_counter into ARCH specific thread_struct
x86: Move fpu_counter into ARCH specific thread_struct
sched: Remove ARCH specific fpu_counter from task_struct
arch/sh/include/asm/fpu.h | 2 +-
arch/sh/include/asm/processor_32.h | 10 ++++++++++
arch/sh/include/asm/processor_64.h | 10 ++++++++++
arch/sh/kernel/cpu/fpu.c | 2 +-
arch/sh/kernel/process_32.c | 6 +++---
arch/x86/include/asm/fpu-internal.h | 10 +++++-----
arch/x86/include/asm/processor.h | 9 +++++++++
arch/x86/kernel/i387.c | 2 +-
arch/x86/kernel/process_32.c | 4 ++--
arch/x86/kernel/process_64.c | 2 +-
arch/x86/kernel/traps.c | 2 +-
include/linux/sched.h | 9 ---------
12 files changed, 44 insertions(+), 24 deletions(-)
--
1.8.1.2
next reply other threads:[~2013-10-08 7:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-08 7:46 Vineet Gupta [this message]
2013-10-08 7:46 ` [PATCH v2 1/3] sh: Move fpu_counter into ARCH specific thread_struct Vineet Gupta
2013-10-08 7:46 ` Vineet Gupta
2013-10-08 7:46 ` [PATCH v2 3/3] sched: Remove ARCH specific fpu_counter from task_struct Vineet Gupta
2013-10-08 7:46 ` Vineet Gupta
2013-10-08 8:02 ` Ingo Molnar
2013-10-08 8:02 ` Ingo Molnar
2013-10-08 20:14 ` [PATCH v2 0/3] Move ARCH specific fpu_counter out of task_struct Andrew Morton
2013-10-09 5:55 ` Vineet Gupta
2013-10-09 5:39 ` [PATCH v2 2/3] x86: Move fpu_counter into ARCH specific thread_struct Vineet Gupta
2013-10-10 13:02 ` [PATCH v2 0/3] Move ARCH specific fpu_counter out of task_struct Vineet Gupta
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