Messages in this thread |  | | From | Michel Lespinasse <> | Subject | [PATCH 0/4] rwsem: Implement writer lock-stealing | Date | Fri, 8 Feb 2013 18:45:33 -0800 |
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This proposal implements writer lock stealing in lib/rwsem.c, just as Alex Shi's earlier proposal did for the simpler lib/rwsem-spinlock.c
Patches 1 and 2 are small cleanups that I thought I should separate from the bulk of the changes; Patch 3 is the generic support for write lock stealing; Patch 4 is the x86 support (optional, only required for higher performance).
I am not in an ideal position to push this as I will be out of town starting from the middle of next week. However, I hope that this proposal will at least get the ball rolling. I did run some basic testing including David Howell's synchro-test module (as found in Andrew's -mm tree).
Michel Lespinasse (4): rwsem: make the waiter type an enumeration rather than a bitmask rwsem: shorter spinlocked section in rwsem_down_failed_common() rwsem: implement write lock stealing x86 rwsem: avoid taking slow path when stealing write lock
arch/x86/include/asm/rwsem.h | 28 +++-- include/linux/rwsem.h | 2 + lib/rwsem.c | 252 ++++++++++++++++++++----------------------- 3 files changed, 139 insertions(+), 143 deletions(-)
-- 1.8.1
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