Assume that plain aligned writes up to word size are atomic
configname: CONFIG_KCSAN_ASSUME_PLAIN_WRITES_ATOMIC
Linux Kernel Configuration
└─>Kernel hacking
└─>Generic Kernel Debugging Instruments
└─>KCSAN: dynamic data race detector
└─>Assume that plain aligned writes up to word size are atomic
In linux kernel since version 5.1 (release Date: 2019-05-05)
Assume that plain aligned writes up to word size are atomic by
default, and also not subject to other unsafe compiler optimizations
resulting in data races. This will cause KCSAN to not report data
races due to conflicts where the only plain accesses are aligned
writes up to word size: conflicts between marked reads and plain
aligned writes up to word size will not be reported as data races;
notice that data races between two conflicting plain aligned writes
will also not be reported.
default, and also not subject to other unsafe compiler optimizations
resulting in data races. This will cause KCSAN to not report data
races due to conflicts where the only plain accesses are aligned
writes up to word size: conflicts between marked reads and plain
aligned writes up to word size will not be reported as data races;
notice that data races between two conflicting plain aligned writes
will also not be reported.