linux-kernel - [PATCH -v7 0/3] Lockless memory allocator and list

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Message-Id: <1291344418-25206-1-git-send-email-ying.huang@intel.com>
Date:	Fri,  3 Dec 2010 10:46:55 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Len Brown <lenb@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Andi Kleen <andi@...stfloor.org>,
	ying.huang@...el.com, linux-acpi@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: [PATCH -v7 0/3] Lockless memory allocator and list

This patchset adds a lockless memory allocator and a lock-less
list.

v7:

- Revise ARCH_HAVE_NMI_SAFE_CMPXCHG definition for some architectures
  according to architecture maitainers' comments.
- Remove spin_trylock_irqsave based fallback for lockless memory allocator,
  because it does not work for !CONFIG_SMP and is not likely to be used.
- Make lockless memory allocator and list does not depend on
  ARCH_HAVE_NMI_SAFE_CMPXCHG.  Instead, require the user to depend on it
  when needed. And BUG_ON(in_nmi()) is added in necessary place to prevent
  silent race.

v6:

- Revise ARCH_HAVE_NMI_SAFE_CMPXCHG definition for some architectures
  according to architecture maitainers' comments.

v5:

- Add ARCH_HAVE_NMI_SAFE_CMPXCHG
- Add spin_trylock_irqsave based fallback in lockless memory allocator
  if ARCH_HAVE_NMI_SAFE_CMPXCHG=n
- Make lockless list depends on ARCH_HAVE_NMI_SAFE_CMPXCHG

v4:

- Split from APEI patchset
- Update patch description and comments according to ML comments

v3:

- Rework lockless memory allocator and list according to ML comments

[PATCH -v7 1/3] Add Kconfig option ARCH_HAVE_NMI_SAFE_CMPXCHG
[PATCH -v7 2/3] lib, Make gen_pool memory allocator lockless
[PATCH -v7 3/3] lib, Add lock-less NULL terminated single list
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