Hello, Thomas. Thanks for such a rapid reply!
On Fri, Feb 01, 2019 at 23:04:48 +0100, Thomas Gleixner wrote: > Hello Alan, > On Fri, 1 Feb 2019, Alan Mackenzie wrote: > > 0e334db6bb4b1fd1e2d72c1f3d8f004313cd9f94 > > posix-timers: Fix division by zero bug > > Committed: 2018-12-17 17:35:45 +0100 > > With this patch in place I am seeing problems with glibc's function > > timer_create. I am an Emacs maintainer, and saw these problems whilst > > investigating Emacs bug #34235 "27.0.50; lisp profiler does not work". > > Emacs's profiler fails in kernel 4.19.13, but works in a version of > > 4.19.13 with the patch reversed, otherwise unchanged. My current version > > of glibc is 2.27-r6 (I think the "-r6" comes from Gentoo, my distro). > Please upgrade to 4.19.19. The issue should be fixed there with the > backported variant of > 93ad0fc088c5 ("posix-cpu-timers: Unbreak timer rearming") > Commit 21c0d1621b8d4b in 4.19.19 I've just built and installed Linux 4.19.19, and it does indeed solve the Emacs profiler bug, #34235. :-) I see that the patch has been installed in 4.20.6, 4.19.19, and 4.14.97. Are there any plans to install it into 4.9.x, the other live long term support branch? The reason I ask is to make an entry into Emacs's PROBLEMS file, telling users and distributions which kernel versions to upgrade to. > Thanks, > tglx -- Alan Mackenzie (Nuremberg, Germany).