port-mips: Re: "pmap_unwire: wiring ... didn't change!"

Subject: Re: "pmap_unwire: wiring ... didn't change!"
To: Izumi Tsutsui <tsutsui@ceres.dti.ne.jp>
From: Markus W Kilbinger <kilbi@rad.rwth-aachen.de>
List: port-mips
Date: 02/26/2005 10:39:07

>>>>> "Izumi" == Izumi Tsutsui <tsutsui@ceres.dti.ne.jp> writes:
 >> Yes: A (large) file that was intact a first time seems to be
 >> corrupt when reading it later a second time (and vice versa).
 Izumi> Hmm, I've confirmed it certainly happens on my RaQ2.
 Izumi> Multiple "cmp -l file1 file2" after "cp file1 file2" shows
 Izumi> different results. This happens both on wd0 at viaide and
 Izumi> on sd0 at siop.
 Izumi> With the attached (a bit ugly) patch against cache.c (which
 Izumi> make always wbinv use index ops) the problem seems
 Izumi> disappear, but I'm not sure what is the real problem.
I've just tried this patch on my qube2: It seems to avoid the problem
in pure read situation ('cmp', 'sha1' et al.), but I still can
reproduce corruptions if doing 'cp file1 fileN' multiple times...
Markus.