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Linux futexes

To: tech-kern%NetBSD.org@localhost
Subject: Linux futexes
From: Robert Swindells <rjs%fdy2.co.uk@localhost>
Date: Sat, 27 Jul 2019 13:05:45 +0100

I don't think the Linux futex emulation code is correct/good enough.

Trying to use Linux OpenJDK 11 to compile itself it stops making
any progress fairly quickly with all threads blocked waiting on
a futex.

Also seen with the installer for the latest Xilinx Vivado FPGA tools,
the UI stops responding to mouse clicks after one action has been
selected.

Robert Swindells

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