Comment 6 for bug 98783

Somebody please explain this output from top:
15744 20 0 1029m 345m 32m S 12 17.2 33:11.88 firefox
22617 20 0 395m 243m 6944 S 10 12.1 27:47.82 Xorg
24251 20 0 592m 89m 23m S 6 4.5 13:38.97 plasma
28131 20 0 612m 81m 58m S 0 4.1 0:02.50 soffice.bin
28215 20 0 503m 80m 33m S 4 4.0 0:03.50 konqueror
20960 20 0 840m 80m 35m S 2 4.0 4:31.19 amarok

and xrestop:
xrestop - Display: :0
          Monitoring 45 clients. XErrors: 0
          Pixmaps: 58122K total, Other: 177K total, All: 58300K total

After quitting firefox (i'm writing this from konqueror), top:
22617 20 0 394m 243m 6696 S 3 12.1 27:57.58 Xorg
24251 20 0 592m 90m 23m S 3 4.5 13:44.09 plasma
28131 20 0 612m 81m 58m S 0 4.1 0:02.53 soffice.bin
28215 20 0 504m 80m 34m S 0 4.0 0:07.18 konqueror
20960 20 0 840m 80m 35m S 0 4.0 4:31.53 amarok

xrestop - Display: :0
          Monitoring 43 clients. XErrors: 0
          Pixmaps: 57079K total, Other: 146K total, All: 57225K total

Only 1MB got freed, Xorg is still eating up 243MB. BTW, my graphics card has "only" 128 MB, so it cannot be that memory shown as used by Xorg is actually memory from the graphics card.

Cheers!