Subject: RE: UBC on a no swap system
To: 'Vasant Kanchan' <v_kanchan@yahoo.com>
From: Huy Vu <hvu@hyperchip.com>
List: tech-embed
Date: 06/17/2003 14:53:45
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We had the same problem, this is how we 'work-around' the problem :-)
--------------
Index: uvm_fault.c
===================================================================
RCS file: /cvsroot/netbsd-current/netbsd1.6/sys/uvm/uvm_fault.c,v
retrieving revision 1.2
retrieving revision 1.3
diff -r1.2 -r1.3
538c538,541
< vaddr_t startva, objaddr, currva, offset;
---
> #ifdef NEW_ALGORITHM
> int t;
> #endif
> vaddr_t startva, objaddr, currva, offset;
1163c1166,1174
< if (anon == NULL || uvmexp.swpgonly ==
uvmexp.swpages) {
---
>
> #ifdef NEW_ALGORITHM
> t = uvmexp.active + uvmexp.inactive + uvmexp.free;
> if (anon == NULL || (uvmexp.swpgonly ==
uvmexp.swpages &&
> uvmexp.filepages <= ((t * uvmexp.filemin) >> 8) &&
> uvmexp.execpages <= ((t * uvmexp.execmin) >> 8))) {
> #else
> if (anon == NULL || (uvmexp.swpgonly ==
uvmexp.swpages)) {
> #endif
1579c1590,1598
< if (anon == NULL || uvmexp.swpgonly ==
uvmexp.swpages) {
---
>
> #ifdef NEW_ALGORITHM
> t = uvmexp.active + uvmexp.inactive + uvmexp.free;
> if (anon == NULL || (uvmexp.swpgonly ==
uvmexp.swpages &&
> uvmexp.filepages <= ((t * uvmexp.filemin) >> 8) &&
> uvmexp.execpages <= ((t * uvmexp.execmin) >> 8))) {
> #else
> if (anon == NULL || (uvmexp.swpgonly ==
uvmexp.swpages)) {
> #endif
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<TITLE>RE: UBC on a no swap system</TITLE>
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<P><FONT SIZE=3D2>We had the same problem, this is how we 'work-around' =
the problem :-)</FONT>
</P>
<P><FONT SIZE=3D2>--------------</FONT>
<BR><FONT SIZE=3D2>Index: uvm_fault.c</FONT>
<BR><FONT =
SIZE=3D2>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</FONT=
>
<BR><FONT SIZE=3D2>RCS file: =
/cvsroot/netbsd-current/netbsd1.6/sys/uvm/uvm_fault.c,v</FONT>
<BR><FONT SIZE=3D2>retrieving revision 1.2</FONT>
<BR><FONT SIZE=3D2>retrieving revision 1.3</FONT>
<BR><FONT SIZE=3D2>diff -r1.2 -r1.3</FONT>
<BR><FONT SIZE=3D2>538c538,541</FONT>
<BR><FONT SIZE=3D2>< vaddr_t =
startva, objaddr, currva, offset;</FONT>
<BR><FONT SIZE=3D2>---</FONT>
<BR><FONT SIZE=3D2>> #ifdef NEW_ALGORITHM</FONT>
<BR><FONT SIZE=3D2>> int t;</FONT>
<BR><FONT SIZE=3D2>> #endif</FONT>
<BR><FONT SIZE=3D2>> vaddr_t startva, =
objaddr, currva, offset;</FONT>
<BR><FONT SIZE=3D2>1163c1166,1174</FONT>
<BR><FONT =
SIZE=3D2><  =
;  =
; if (anon =3D=3D NULL || uvmexp.swpgonly =3D=3D uvmexp.swpages) =
{</FONT>
<BR><FONT SIZE=3D2>---</FONT>
<BR><FONT SIZE=3D2>></FONT>
<BR><FONT SIZE=3D2>> #ifdef NEW_ALGORITHM</FONT>
<BR><FONT =
SIZE=3D2>>  =
; t =3D uvmexp.active + uvmexp.inactive + =
uvmexp.free;</FONT>
<BR><FONT =
SIZE=3D2>>  =
;  =
; if (anon =3D=3D NULL || (uvmexp.swpgonly =3D=3D uvmexp.swpages =
&&</FONT>
<BR><FONT =
SIZE=3D2>>  =
; uvmexp.filepages <=3D ((t * =
uvmexp.filemin) >> 8) &&</FONT>
<BR><FONT =
SIZE=3D2>>  =
; uvmexp.execpages <=3D ((t * =
uvmexp.execmin) >> 8))) {</FONT>
<BR><FONT SIZE=3D2>> #else</FONT>
<BR><FONT =
SIZE=3D2>>  =
;  =
; if (anon =3D=3D NULL || (uvmexp.swpgonly =3D=3D uvmexp.swpages)) =
{</FONT>
<BR><FONT SIZE=3D2>> #endif</FONT>
<BR><FONT SIZE=3D2>1579c1590,1598</FONT>
<BR><FONT =
SIZE=3D2><  =
;  =
; if (anon =3D=3D NULL || uvmexp.swpgonly =3D=3D uvmexp.swpages) =
{</FONT>
<BR><FONT SIZE=3D2>---</FONT>
<BR><FONT SIZE=3D2>></FONT>
<BR><FONT SIZE=3D2>> #ifdef NEW_ALGORITHM</FONT>
<BR><FONT =
SIZE=3D2>>  =
; t =3D uvmexp.active + uvmexp.inactive + =
uvmexp.free;</FONT>
<BR><FONT =
SIZE=3D2>>  =
;  =
; if (anon =3D=3D NULL || (uvmexp.swpgonly =3D=3D uvmexp.swpages =
&&</FONT>
<BR><FONT =
SIZE=3D2>>  =
; uvmexp.filepages <=3D ((t * =
uvmexp.filemin) >> 8) &&</FONT>
<BR><FONT =
SIZE=3D2>>  =
; uvmexp.execpages <=3D ((t * =
uvmexp.execmin) >> 8))) {</FONT>
<BR><FONT SIZE=3D2>> #else </FONT>
<BR><FONT =
SIZE=3D2>>  =
;  =
; if (anon =3D=3D NULL || (uvmexp.swpgonly =3D=3D uvmexp.swpages)) =
{</FONT>
<BR><FONT SIZE=3D2>> #endif</FONT>
</P>
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