Comment 692 for bug 595047

After setting boot flag "scsi_mod.use_blk_mq=1", the freezes became much shorter. I'm not sure now that they are at the kernel level. More look like that window manager (GNOME mutter) is written in such a way that freezes mouse while loading list of applications. To finally defeat freezes, seems need to make the window manager not paged into the swap file.

I'm also catch vmstat output when freeze occurred:
# vmstat
procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
 r b swpd free buff cache si so bi bo in cs us sy id wa st
 2 6 15947052 205136 112592 4087608 32 41 93 119 7 23 43 19 37 1 0