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Groups > linux.kernel > #1401831
| From | Jason Low <jason.low2@hpe.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RFC][PATCH 0/7] locking/rwsem: Convert rwsem count to atomic_long_t |
| Date | 2016-05-17 02:50 +0200 |
| Message-ID | <rzBmV-5OI-3@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
The first patch contains an optimization for acquiring the rwsem write lock
in the slowpath.
This rest of the series converts the rwsem count variable to an atomic_long_t
since it is used it as an atomic variable. This allows us to also remove
the rwsem_atomic_{add,update} abstraction and reduce 100+ lines of code.
arch/alpha/include/asm/rwsem.h | 42 --------------------------------
arch/ia64/include/asm/rwsem.h | 7 ------
arch/s390/include/asm/rwsem.h | 37 -----------------------------
arch/x86/include/asm/rwsem.h | 18 --------------
include/asm-generic/rwsem.h | 16 -------------
include/linux/rwsem.h | 6 ++---
kernel/locking/rwsem-xadd.c | 54 ++++++++++++++++++++++++++----------------
7 files changed, 36 insertions(+), 144 deletions(-)
--
2.1.4
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[RFC][PATCH 0/7] locking/rwsem: Convert rwsem count to atomic_long_t Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
[RFC][PATCH 6/7] locking,s390: Remove s390 rwsem add and rwsem update Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
[RFC][PATCH 7/7] locking,asm-generic: Remove generic rwsem add and rwsem update definitions Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
[RFC][PATCH 5/7] locking,ia64: Remove ia64 rwsem add and rwsem update Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
[RFC][PATCH 1/7] locking/rwsem: Optimize write lock by reducing operations in slowpath Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
[RFC][PATCH 3/7] locking,x86: Remove x86 rwsem add and rwsem update Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
[RFC][PATCH 2/7] locking/rwsem: Convert sem->count to atomic_long_t Jason Low <jason.low2@hpe.com> - 2016-05-17 02:50 +0200
Re: [RFC][PATCH 0/7] locking/rwsem: Convert rwsem count to atomic_long_t Linus Torvalds <torvalds@linux-foundation.org> - 2016-05-17 03:20 +0200
Re: [RFC][PATCH 0/7] locking/rwsem: Convert rwsem count to atomic_long_t Peter Zijlstra <peterz@infradead.org> - 2016-05-17 13:20 +0200
Re: [RFC][PATCH 0/7] locking/rwsem: Convert rwsem count to atomic_long_t Jason Low <jason.low2@hpe.com> - 2016-05-17 19:10 +0200
Re: [RFC][PATCH 0/7] locking/rwsem: Convert rwsem count to atomic_long_t Davidlohr Bueso <dave@stgolabs.net> - 2016-05-20 08:30 +0200
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