Searching for Linux Futex Support information? Find all needed info by using official links provided below.
http://man7.org/linux/man-pages/man2/futex.2.html
Futexes were first made available in a stable kernel release with Linux 2.6.0. Initial futex support was merged in Linux 2.5.7 but with different semantics from what was described above. A four-argument system call with the semantics described in this page was introduced in Linux 2.5.40.
https://www.tutorialspoint.com/unix_system_calls/futex.htm
The futex() system call provides a method for a program to wait for a value at a given address to change, and a method to wake up anyone waiting on a particular address (while the addresses for the same memory in separate processes may not be equal, the kernel maps them internally so the same memory mapped in different locations will correspond for futex() calls).
https://linux.die.net/man/7/futex
The Linux kernel provides futexes ("Fast user-space mutexes") as a building block for fast user-space locking and semaphores. Futexes are very basic and lend themselves well for building higher level locking abstractions such as POSIX mutexes.
https://www.systutorials.com/docs/linux/man/2-futex/
Futexes were first made available in a stable kernel release with Linux 2.6.0. Initial futex support was merged in Linux 2.5.7 but with different semantics from what was described above. A four-argument system call with the semantics described in this page was introduced in Linux 2.5.40.
https://support.datastax.com/hc/en-us/articles/206259833-Nodes-appear-unresponsive-due-to-a-Linux-futex-wait-kernel-bug
The problem is due to a Linux futex_wait() bug which causes user processes to deadlock and hang. A futex_wait() call (and any processes making a call) can stay blocked forever. JVM synchronization method calls such as lock(), park() and unpark() all make futex…
http://support.sas.com/kb/58/166.html
The SAS ® Web Application Server stops responding in SAS ® 9.4 Enterprise BI Server. The source of the problem appears to be a Linux kernel FUTEX_WAIT() problem. To avoid the problem, upgrade to a Linux kernel version that has a fix for that defect.
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