Date: Tue, 18 Mar 2008 16:00:04 GMT From: "Yousif Hassan" <yousif@alumni.jmu.edu> To: freebsd-net@FreeBSD.org Subject: Re: kern/121720: [wpi] wpi doesnt work if kernel has optionsSCHED_ULE Message-ID: <200803181600.m2IG04sj087301@freefall.freebsd.org>
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The following reply was made to PR kern/121720; it has been noted by GNATS. From: "Yousif Hassan" <yousif@alumni.jmu.edu> To: "Andrew Lankford" <lankfordandrew@charter.net>, <bug-followup@FreeBSD.org>, <Helko.Glathe@freenet.de> Cc: Subject: Re: kern/121720: [wpi] wpi doesnt work if kernel has optionsSCHED_ULE Date: Tue, 18 Mar 2008 11:34:09 -0400 ----- Original Message ----- From: "Andrew Lankford" <lankfordandrew@charter.net> To: <freebsd-net@FreeBSD.org> Sent: Monday, March 17, 2008 3:20 AM Subject: Re: kern/121720: [wpi] wpi doesnt work if kernel has optionsSCHED_ULE > The following reply was made to PR kern/121720; it has been noted by > GNATS. > > From: Andrew Lankford <lankfordandrew@charter.net> > To: bug-followup@FreeBSD.org, Helko.Glathe@freenet.de > Cc: > Subject: Re: kern/121720: [wpi] wpi doesnt work if kernel has options > SCHED_ULE > Date: Mon, 17 Mar 2008 02:49:43 -0400 > > Same problem here with my 7-STABLE machine. Settling for SCHED_4BSD did > the trick. If this is a problem with the driver, then perhaps a MFC of > some recent (as in several days old) "stability fixes" to the wpi source > will fix the problem: > http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/wpi/if_wpi.c > > wpi in STABLE has panicked my laptop at least once. > > If you're impatient, I imagine that the latest cvs patches may work with > 7-STABLE. > > Andrew Lankford I'm adding this as a point of reference in case it helps a developer: My HP dv9700t runs SCHED_ULE and wpi works great. This leads me to suspect that this is probably not just as simple as if_wpi and the scheduler; I believe this has to do with a combination of the wpi driver and the BIOS (and/or ACPI). There have been other problem reports related to different loading / attach / buggy behavior with wpi - different computers seem to produce different results. This sounds related (albeit SCHED_4BSD appears to solve this particular issue). FWIW. --Y
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