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     If Xorg(1) acceleration fails to initialize with a ``contigmalloc_map:
     failed size...'' error in dmesg, the reserve of memory for DMA ran out
     early and should be increased to a sufficiently high value by setting
the
     vm.dma_reserved loader tunable.  A read only sysctl(8) variable of the
     same name is provided for obtaining its current value.

Sam

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<div class=3D"gmail_quote">On Fri, Mar 23, 2012 at 7:41 PM, Kyuupi <span di=
r=3D"ltr"><<a href=3D"mailto:kyuupichan at gmail.com">kyuupichan at gmail.com<=
/a>></span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:=
0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I have jerky window dragging where repainting is very slow.<br><br>I believ=
e it is because DRI is not working with my graphics card, in turn<br>becaus=
e of a failure to allocate contiguous memory.<br><br>Relevant snippets of d=
mesg below.=A0 Is there something I can do to fix this?<br>

<br>I'm using kernel source as of about 48 hours ago.<br><br>Neil.<br><=
br>DragonFly v2.13.0.381.gca541-DEVELOPMENT #0: Sun Nov 27 12:27:02 JST 201=
1<br>=A0=A0=A0 root at athlon2.akihabara.co.uk:/usr/obj/usr/src/sys/X86_64_GEN=
ERIC<br>

<br>CPU: AMD Athlon(tm) Dual Core Processor 5050e (2600.16-MHz K8-class CPU=
)<br>=A0 Origin =3D "AuthenticAMD"=A0 Id =3D 0x60fb2=A0 Stepping =
=3D 2<br>=A0 Features=3D0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,AP=
IC,SEP,MTRR,PGE,MCA,C<br>

MOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT><br>=A0 Features2=3D0x2001&l=
t;SSE3,CX16><br>=A0 AMD Features=3D0xea500800<SYSCALL,NX,MMX+,FFXSR,R=
DTSCP,LM,3DNow!+,3DNow!><br>=A0 AMD Features2=3D0x11f<LAHF,CMP,SVM,Ex=
tAPIC,CR8,Prefetch><br>

real memory=A0 =3D <a href=3D"tel:4025809920" value=3D"+14025809920" target=
=3D"_blank">4025809920</a> (3839 MB)<br>avail memory =3D 3718107136 (3545 M=
B)<br><br>DMA space used: 2540k, remaining available: 16384k<br>Mounting de=
vfs<br>
drm0: <ATI Radeon HD 3200 Graphics> on vgapci0<br>vgapci0: child drm0=
 requested pci_enable_busmaster<br>
info: [drm] Initialized radeon 1.31.0 20080613<br>contigmalloc_map: failed =
size 16777216 low=3D0 high=3Dffffffff align=3D4096 boundary=3D0 flags=3D000=
00102<br>contigmalloc_map: failed size 16777216 low=3D0 high=3Dffffffff ali=
gn=3D4096 boundary=3D0 flags=3D00000102<br>

pid 27585 (conftest), uid 0: exited on signal 11<br>Warning: busy page 0xff=
ffffe0036c39a8 found in cache<br><br>
</blockquote></div><br><div>From the drm(4) manpage:</div><div><br></div><d=
iv><div>=A0 =A0 =A0If Xorg(1) acceleration fails to initialize with a ``con=
tigmalloc_map:</div><div>=A0 =A0 =A0failed size...'' error in dmesg=
, the reserve of memory for DMA ran out</div>
<div>=A0 =A0 =A0early and should be increased to a sufficiently high value =
by setting the</div><div>=A0 =A0 =A0vm.dma_reserved loader tunable. =A0A re=
ad only sysctl(8) variable of the</div><div>=A0 =A0 =A0same name is provide=
d for obtaining its current value.</div>
</div><div><br></div><div>Sam</div>

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