The install-prefix of killall seems to have changed from /usr to / some time ago. "dosym killall /usr/bin/pidof" stayed the same and there is no correct symlink created anymore. However "baselayout" provides "/sbin/pidof" now and the wrong dosym command from "psmisc" can be removed. Since many scripts still use "/usr/bin/killall" the ebuild should create a symlink like the still experimental psmisc-21 ebuild. Well either do the symlink in the stable 19-r3 or put 21 out of experimental status.
*** This bug has been marked as a duplicate of 10849 ***