Messages in this thread | | | From | Michel Lespinasse <> | Subject | [PATCH 00/11] V4: rwsem changes + down_read_critical() proposal | Date | Mon, 24 May 2010 13:31:10 -0700 |
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This is version 4 of my rwsem changes.
Changes since V3:
- Split first x86 rwsem change in two smaller parts - Added David's rwsem_waiter_type enum suggestion into 'rwsem: down_read_critical infrastructure support' - Lots of minor style fixes and comments clarified
I would hope the entire series can be considered for inclusion; however if we can not agree on the down_read_critical() bits I would still like patches 1-7 to be independently considered as I think they still have merit on their own.
Michel Lespinasse (11): x86 rwsem: stay on fast path when count>0 in __up_write() x86 rwsem: minor cleanups rwsem: fully separate code pathes to wake writers vs readers rwsem: lighter active count checks when waking up readers rwsem: let RWSEM_WAITING_BIAS represent any number of waiting threads rwsem: wake queued readers when writer blocks on active read lock rwsem: smaller wrappers around rwsem_down_failed_common generic rwsem: implement down_read_critical() / up_read_critical() rwsem: down_read_critical infrastructure support x86 rwsem: down_read_critical implementation Use down_read_critical() for /proc/<pid>/exe and /proc/<pid>/maps files
arch/x86/include/asm/rwsem.h | 73 +++++++++++------ arch/x86/lib/rwsem_64.S | 14 +++- arch/x86/lib/semaphore_32.S | 21 ++++- fs/proc/base.c | 4 +- fs/proc/task_mmu.c | 24 ++++-- include/linux/proc_fs.h | 1 + include/linux/rwsem-spinlock.h | 10 ++- include/linux/rwsem.h | 12 +++ kernel/rwsem.c | 35 ++++++++ lib/rwsem-spinlock.c | 10 ++- lib/rwsem.c | 178 +++++++++++++++++++++++++--------------- 11 files changed, 276 insertions(+), 106 deletions(-)
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