[haiku-bugs] Re: [Haiku] #5383: MTRR regression: AGP transfer inconsistencies
- From: "rudolfc" <trac@xxxxxxxxxxxx>
- Date: Tue, 16 Feb 2010 20:17:45 -0000
#5383: MTRR regression: AGP transfer inconsistencies
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Reporter: rudolfc | Owner: nobody
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: - General | Version: R1/alpha1
Keywords: | Blockedby: 5353
Platform: All | Blocking:
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Comment(by rudolfc):
Hi there,
Thanks for the info. I did a quick read on the PTE bits and #5353: so if
you go that way that would mean that MTRR-WC in system RAM would not be
possible anymore on Haiku since the PWT bit only gives the options write-
trough and write back? (not write-combining)
Since I cannot flush the ram buffer (partly) in userspace(?) write-back
isn't useable so the writing to cache can only be disabled indeed then to
get it working at all?
Do I miss something? Is the driver correctly setup for this 1Mb buffer?
Should I modify something here or is this a problem that will be solved
elsewhere (kernel)?
Since I am no expert here I would very much appreciate info on what I
should do or what I should expect...
Thanks!
Rudolf.
--
Ticket URL: <http://dev.haiku-os.org/ticket/5383#comment:3>
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