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Default branch: MAIN
Revision 1.2 / (download) - annotate - [select for diffs], Sun Jun 3 15:09:26 2018 UTC (6 years ago) by kettenis
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE,
OPENBSD_7_5,
OPENBSD_7_4_BASE,
OPENBSD_7_4,
OPENBSD_7_3_BASE,
OPENBSD_7_3,
OPENBSD_7_2_BASE,
OPENBSD_7_2,
OPENBSD_7_1_BASE,
OPENBSD_7_1,
OPENBSD_7_0_BASE,
OPENBSD_7_0,
OPENBSD_6_9_BASE,
OPENBSD_6_9,
OPENBSD_6_8_BASE,
OPENBSD_6_8,
OPENBSD_6_7_BASE,
OPENBSD_6_7,
OPENBSD_6_6_BASE,
OPENBSD_6_6,
OPENBSD_6_5_BASE,
OPENBSD_6_5,
OPENBSD_6_4_BASE,
OPENBSD_6_4,
HEAD
Changes since 1.1: +7 -1 lines
Diff to previous 1.1 (colored)
Implement process-shared futexes. These are now the default implementation. Introduce process-private futexs. These will bypass the uvm mapping lookup and should be slightly more efficient. ok visa@, mpi@
Revision 1.1 / (download) - annotate - [select for diffs], Fri Apr 28 13:50:55 2017 UTC (7 years, 1 month ago) by mpi
Branch: MAIN
CVS Tags: OPENBSD_6_3_BASE,
OPENBSD_6_3,
OPENBSD_6_2_BASE,
OPENBSD_6_2
Add futex(2) syscall based on a sane subset of its Linux equivalent. The syscall is marked NOLOCK and only FUTEX_WAIT grabs the KERNEL_LOCK() because of PCATCH and the signal nightmare. Serialization of threads is currently done with a global & exclusive rwlock. Note that the current implementation still use copyin(9) which is not guaranteed to be atomic. Committing now such that remaining issues can be addressed in-tree. With inputs from guenther@, kettenis@ and visa@. ok deraadt@, visa@