[Intel-gfx] How to limit the size of VideoRAM?

[Wang Xu]

Hi,

I am using KMS and xf86-video-intel git master, and have 2G physical
RAM and 2G swap partition. but even when I swapoff the swap, the Xorg
would use 4G videoRAM.

The problem is it leads to much more swap operation and almost freeze
the window...  the results of vmstat, pmap, and free are listed
following. Any ideas?

Regards,

gnawux at stream:~/src/video$ vmstat 5 400
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 1  0  54080  52436  11508 1779008    3   10   126    44  493  480  8  5 83  5
 0  0  54024  52428  11516 1779020   11    0    12     5  529  923  1  1 97  0
 3  0  53956  52412  11524 1779016    9    0     9    11 1478 1794  5 12 83  0
 1  0  52900  52568  11528 1780048    0    0     2     0 1457 1520  6  9 85  0
 1  1  68028  49524  11524 1774096    0  776   365   904 2097 1988 17  9 65  9
 1  1  90784  52360  10752 1757924    0  962     8   992 2087 1889  5 20 59 16
[...]
 1  0 105636  51772  10544 1751956   19  886    53   900 1787 2011  7 12 77  4
 1  0  96380  51072  10588 1762844   13    0   351    22 1696 1190 12 13 71  4
 2  1 141388  48964   3740 1757132   26 3212  1058  3266 2081 1047 10 14 37 39
 0  3 295208  49584   1352 1685824  118 12168  1454 12226 1969  868  3 17 37 42
 2  7 323700  50992    756 1668212   62 1445  3300  1453  951  965  2  5 29 65
 0  0 358920  58340   1000 1632748   19 1812  1690  1837 2235 1600  6 23 41 30
...

gnawux at stream:~$ sudo pmap 13730
13730:   /usr/bin/X :0 -audit 0 -auth /var/lib/gdm/:0.Xauth -nolisten tcp vt7
08048000   1604K r-x--  /usr/local/bin/Xorg
081d9000     36K rw---  /usr/local/bin/Xorg
081e2000     44K rw---    [ anon ]
08666000   4240K rw---    [ anon ]
39398000   1024K rw-s-  /drm mm object (deleted)
39498000   1024K rw-s-  /drm mm object (deleted)

[..... about 2000 lines like above line]

b778b000    144K r-x--  /usr/lib/libexpat.so.1.5.2
b77af000      8K rw---  /usr/lib/libexpat.so.1.5.2
b77c7000   2348K r-x--  /usr/local/lib/dri/i915_dri.so
b7a12000     88K rw---  /usr/local/lib/dri/i915_dri.so
b7a28000     44K rw---    [ anon ]
b7a33000    116K r-x--  /usr/local/lib/xorg/modules/libfb.so
b7a50000      4K rw---  /usr/local/lib/xorg/modules/libfb.so
b7a51000     32K r-x--  /usr/local/lib/libdrm_intel.so.1.0.0
b7a59000      4K rw---  /usr/local/lib/libdrm_intel.so.1.0.0
b7a5a000    472K r-x--  /usr/local/lib/xorg/modules/drivers/intel_drv.so
b7ad0000     88K rw---  /usr/local/lib/xorg/modules/drivers/intel_drv.so
b7ae6000     32K r-x--  /usr/local/lib/libdrm.so.2.4.0
b7aee000      4K rw---  /usr/local/lib/libdrm.so.2.4.0
........

gnawux at stream:~$ free
             total       used       free     shared    buffers     cached
Mem:       2065888    2001564      64324          0       2476    1527884
-/+ buffers/cache:     471204    1594684
Swap:      2010920     603548    1407372


-- 
Wang Xu
Gilda Radner  - "Adopted kids are such a pain - you have to teach them
how to look like you."