Sebastian Christ <rudolfo.christ@gmail.com> writes:

[...]

> So, aren't you restarting Emacs after pkill -SIGUSR2 emacs? 

pkill -SIGUSR2 emacs does not stop emacs. Emacs will start a debugging
session that you can stop to go back to a "normal" emacs. I found out
that it generally makes emacs responsive enough so that I can launch the
org reset cache function.

I found the USR2 signal trick in irreal¹.

¹  here: http://irreal.org/blog/?p=5218
-- 
Konubinix
GPG Key    : 7439106A
Fingerprint: 5993 BE7A DA65 E2D9 06CE  5C36 75D2 3CED 7439 106A