maintainer-feedback requested: [Bug 217676] [DRI3] x11/libxshmfence: switch to /tmp for named shared memory mappings

[bugzilla-noreply at freebsd.org]

Jan Beich (mail not working) <jbeich at FreeBSD.org> has reassigned Bugzilla
Automation <bugzilla at FreeBSD.org>'s request for maintainer-feedback to
x11 at FreeBSD.org:
Bug 217676: [DRI3] x11/libxshmfence: switch to /tmp for named shared memory
mappings
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217676



--- Description ---
Created attachment 180684
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=180684&action=edit
v0

With DRI3 enabled Xserver may create a lot of temporary files under /var/tmp.
Per hier(7) /var/tmp has to be persistent across reboots. However, Xserver
fails to clean up temporary files on its own. On the other hand /tmp can use
tmpfs(5) for faster access, mimicking /dev/shm on Linux.

$ ls -l /var/tmp/shm*
-rw-------  1 root  wheel     4B Mar 10 13:18 /var/tmp/shmfd-BguYGR
-rw-------  1 root  wheel     4B Mar 10 13:18 /var/tmp/shmfd-GB5BR6
-rw-------  1 root  wheel     4B Mar 10 13:18 /var/tmp/shmfd-Gn3rZg
-rw-------  1 root  wheel     4B Mar 10 13:18 /var/tmp/shmfd-HGV0zt
-rw-------  1 root  wheel     4B Mar 10 13:18 /var/tmp/shmfd-KRLyPk
-rw-------  1 root  wheel     4B Mar 10 13:18 /var/tmp/shmfd-YvGU8y
-rw-------  1 root  wheel     4B Mar 10 13:18 /var/tmp/shmfd-nLoJJ6
-rw-------  1 root  wheel     4B Mar 10 13:18 /var/tmp/shmfd-sUaud9
-rw-------  1 root  wheel     4B Mar 10 13:18 /var/tmp/shmfd-vTOEKK
-rw-------  1 root  wheel     4B Mar 10 13:18 /var/tmp/shmfd-yvrKri

$ fstat /var/tmp/shm*
USER	 CMD	      PID   FD MOUNT	  INUM MODE	    SZ|DV R/W NAME
root	 Xorg	    36979  512 /var/tmp   1087 -rw-------	4 rw 
/var/tmp/shmfd-HGV0zt
root	 Xorg	    36979  513 /var/tmp   1088 -rw-------	4 rw 
/var/tmp/shmfd-yvrKri
root	 Xorg	    36979  514 /var/tmp   1091 -rw-------	4 rw 
/var/tmp/shmfd-GB5BR6
root	 Xorg	    36979  515 /var/tmp   1090 -rw-------	4 rw 
/var/tmp/shmfd-Gn3rZg