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<DIV>r36201 caused this issue, kind of weird.</DIV>
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<DIV>VMMDev.cpp</DIV>
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<DIV>this condition: </DIV>
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<DIV>&& requestHeader.requestType != VMMDevReq_GetHostVersion</DIV></FONT>
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<DIV>After I removed this condition from latest svn code, the cache error no longer displays.</DIV>
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<DIV>Is there any special call to make from guest addition to ensure the above condition? <BR><BR>--- On <B>Thu, 9/29/11, Huihong Luo <I><huisinro@yahoo.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From: Huihong Luo <huisinro@yahoo.com><BR>Subject: Re: [vbox-dev] vbox bug causing Windows system cache problems?<BR>To: "Vitali Pelenjow" <Vitali.Pelenjow@oracle.com><BR>Cc: vbox-dev@virtualbox.org<BR>Date: Thursday, September 29, 2011, 8:32 AM<BR><BR>
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<DIV>Vitali,</DIV>
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<DIV>No problem, I've been doing that. Now narrowed down to r36210 - r36190, where r36210 has the bug, but r36190 works.</DIV>
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<DIV>I will go further. Most likely a bug in vmm.</DIV>
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<DIV>- huihong<BR><BR>--- On <B>Thu, 9/29/11, Vitali Pelenjow <I><Vitali.Pelenjow@oracle.com></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From: Vitali Pelenjow <Vitali.Pelenjow@oracle.com><BR>Subject: Re: [vbox-dev] vbox bug causing Windows system cache problems?<BR>To: "Huihong Luo" <huisinro@yahoo.com><BR>Cc: vbox-dev@virtualbox.org<BR>Date: Thursday, September 29, 2011, 1:58 AM<BR><BR>
<DIV class=yiv1538901033plainMail>Hi Huihong,<BR><BR>we would appreciate, if you could narrow down the changeset, which <BR>introduced the regression.<BR>This would be a great help. The changeset range is still too wide to <BR>have a guess.<BR><BR>Thanks,<BR>Vitali.<BR><BR><BR>Huihong Luo wrote:<BR>> After last few days' buiding different OSE revisions, the bug exists <BR>> between<BR>> r36100 - r36222 (Feb 28, 11 - Mar-09, 11)<BR>> if you have some wild guess on which code change may have caused that, <BR>> let me know, to save some time.<BR>> Otherwise I will continue the brutal force way of narrowing down the <BR>> code set that caused the bug.<BR>><BR>><BR>> --- On *Tue, 9/27/11, Huihong Luo /<<A href="http://us.mc1603.mail.yahoo.com/mc/compose?to=huisinro@yahoo.com" rel=nofollow target=_blank>huisinro@yahoo.com</A>>/* wrote:<BR>><BR>><BR>> From: Huihong Luo <<A
href="http://us.mc1603.mail.yahoo.com/mc/compose?to=huisinro@yahoo.com" rel=nofollow target=_blank>huisinro@yahoo.com</A>><BR>> Subject: Re: [vbox-dev] vbox bug causing Windows system cache<BR>> problems?<BR>> To: <A href="http://us.mc1603.mail.yahoo.com/mc/compose?to=vbox-dev@virtualbox.org" rel=nofollow target=_blank>vbox-dev@virtualbox.org</A><BR>> Date: Tuesday, September 27, 2011, 12:33 PM<BR>><BR>> After some backing tracing, this error occurs from vbox 4.1.0<BR>> r73009, and works well with 4.0.12 and before.<BR>> The windows cache manager displays an error message as attached<BR>> from our driver.<BR>> We run exactly the same guest (same disk, same configure) using<BR>>
different versions of vbox downloaded from virtualbox.org.<BR>> so very likely there is a bug in vbox between 4.0.12 and 4.1.0<BR>><BR>> --- On *Mon, 9/26/11, Huihong Luo /<<A href="http://us.mc1603.mail.yahoo.com/mc/compose?to=huisinro@yahoo.com" rel=nofollow target=_blank>huisinro@yahoo.com</A>>/* wrote:<BR>><BR>><BR>> From: Huihong Luo <<A href="http://us.mc1603.mail.yahoo.com/mc/compose?to=huisinro@yahoo.com" rel=nofollow target=_blank>huisinro@yahoo.com</A>><BR>> Subject: [vbox-dev] vbox bug causing Windows system cache<BR>> problems?<BR>> To: <A href="http://us.mc1603.mail.yahoo.com/mc/compose?to=vbox-dev@virtualbox.org" rel=nofollow target=_blank>vbox-dev@virtualbox.org</A><BR>>
Date: Monday, September 26, 2011, 6:47 PM<BR>><BR>> After one week of debugging, there might be a bug in vbox that<BR>> causes Windows MmFlushSection() to behave weirdly.<BR>> We have a Windows driver working very well on old versions of<BR>> vbox, but not on v4. The problem was caused by MmFlushSection,<BR>> which wrongly updates files that are opened for read. In other<BR>> words, MmFlushSection() causes files to write even if they are<BR>> opened for read, and thus get ACCESS denined error.<BR>> It seems somehow the page dirty bit is not set correctly in<BR>>
some case, because MmFlushSection checks dirty pages.<BR>> I first thought there might be some bugs in our driver's code,<BR>> but strange thing is that it works fine before with old<BR>> versions of vbox, so I post this message just in case<BR>> something wrong with vbox code.<BR>><BR>><BR>> -----Inline Attachment Follows-----<BR>><BR>> _______________________________________________<BR>> vbox-dev mailing list<BR>> <A href="http://us.mc1603.mail.yahoo.com/mc/compose?to=vbox-dev@virtualbox.org" rel=nofollow target=_blank>vbox-dev@virtualbox.org</A><BR>> <<A
href="http://us.mc1603.mail.yahoo.com/mc/compose?to=vbox-dev@virtualbox.org" rel=nofollow target=_blank>http://us.mc1603.mail.yahoo.com/mc/compose?to=vbox-dev@virtualbox.org</A>><BR>> <A href="http://vbox.innotek.de/mailman/listinfo/vbox-dev" rel=nofollow target=_blank>http://vbox.innotek.de/mailman/listinfo/vbox-dev</A><BR>><BR>><BR>> -----Inline Attachment Follows-----<BR>><BR>> _______________________________________________<BR>> vbox-dev mailing list<BR>> <A href="http://us.mc1603.mail.yahoo.com/mc/compose?to=vbox-dev@www.virtualbox.org" rel=nofollow target=_blank>vbox-dev@www.virtualbox.org</A><BR>> <<A href="http://us.mc1603.mail.yahoo.com/mc/compose?to=vbox-dev@www.virtualbox.org" rel=nofollow
target=_blank>http://us.mc1603.mail.yahoo.com/mc/compose?to=vbox-dev@www.virtualbox.org</A>><BR>> <A href="https://www.virtualbox.org/mailman/listinfo/vbox-dev" rel=nofollow target=_blank>https://www.virtualbox.org/mailman/listinfo/vbox-dev</A><BR>><BR>><BR>><BR>> _______________________________________________<BR>> vbox-dev mailing list<BR>> <A href="http://us.mc1603.mail.yahoo.com/mc/compose?to=vbox-dev@virtualbox.org" rel=nofollow target=_blank>vbox-dev@virtualbox.org</A><BR>> <A href="https://www.virtualbox.org/mailman/listinfo/vbox-dev" rel=nofollow target=_blank>https://www.virtualbox.org/mailman/listinfo/vbox-dev</A><BR><BR></DIV></BLOCKQUOTE></TD></TR></TBODY></TABLE></DIV></BLOCKQUOTE></TD></TR></TBODY></TABLE></DIV></td></tr></table>