Hello RT-list! I'm pleased to announce the 4.9.258-rt172 stable release. Note that there was a futex/mutex code collision during the merge of v4.9-257 and another one with the merge of v4.9.258. Even though I believe that it's fixed correctly, anyone with suspicions about futex/rtmutex behavior in these releases should consider starting investigating there. You can get this release via the git tree at: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git branch: v4.9-rt Head SHA1: 417c1df254de98957caae5f4e31337cdd6ae063e Or to build 4.9.258-rt172 directly, the following patches should be applied: https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.9.tar.xz https://www.kernel.org/pub/linux/kernel/v4.x/patch-4.9.258.xz https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/patch-4.9.258-rt172.patch.xz Enjoy! Luis