linux-kernel - [PATCH 0/2] x86/fpu: Fix FPU context sizing boot regression, introduce dynamic task

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Date:	Fri, 17 Jul 2015 12:28:10 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	linux-kernel@...r.kernel.org
Cc:	Andy Lutomirski <luto@...capital.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Hansen <dave@...1.net>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Brian Gerst <brgerst@...il.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Borislav Petkov <bp@...en8.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 0/2] x86/fpu: Fix FPU context sizing boot regression, introduce dynamic task_struct

This series builds on top of Dave Hansen's initial patch that introduced
dynamic task_struct sizing.

The second patch improves the dynamic allocation to not impact non-x86 architectures,
and to make it a bit faster on x86.

( I kept the structure layout build checks in x86 code for the time being,
  because some of the cross-builds failed with the generic check and I didn't
  want to introduce a bigger cross section for any failures. And it's not like
  we'll apply generic sched.h changes without testing x86. )

Thanks,

    Ingo

==========================>

Dave Hansen (1):
  x86/fpu, fork: Dynamically allocate 'struct fpu'

Ingo Molnar (1):
  x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and
    use it on x86

 arch/Kconfig                     |  4 ++++
 arch/x86/Kconfig                 |  1 +
 arch/x86/include/asm/fpu/types.h | 72 ++++++++++++++++++++++++++++++++----------------------------
 arch/x86/include/asm/processor.h | 10 ++++++---
 arch/x86/kernel/fpu/init.c       | 40 +++++++++++++++++++++++++++++++++
 arch/x86/kernel/process.c        |  2 +-
 fs/proc/kcore.c                  |  4 ++--
 include/linux/sched.h            | 16 ++++++++++++--
 kernel/fork.c                    |  7 +++++-
 9 files changed, 113 insertions(+), 43 deletions(-)

-- 
2.1.4

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