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Posted to notifications@logging.apache.org by "swebb2066 (via GitHub)" <gi...@apache.org> on 2023/02/06 03:14:10 UTC

[GitHub] [logging-log4cxx] swebb2066 commented on pull request #190: Prevent priority inversions when logging from multiple threads

swebb2066 commented on PR #190:
URL: https://github.com/apache/logging-log4cxx/pull/190#issuecomment-1418443566

   Having looked deeper at the [Linux futex docs](https://man7.org/linux/man-pages/man2/futex.2.html) and [the glibc pthread implementation](https://github.com/lattera/glibc.git/nptl/pthread_mutex_lock.c), I now believe glibc does do priority inheritance locking by default.
   
   It looks like it is not necessary to explicitly set the PRIO_INHERIT protocol on a mutex. `pthread_mutex_lock.c` only uses `FUTEX_LOCK_PI` and does not use `FUTEX_WAIT`.
   
   This PR is no longer necessary


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