On Sun June 7 2009, Grozdan wrote: > 2009/6/7 Robert Hancock <hancockrwd@xxxxxxxxx>: > > Grozdan wrote: > >> > >> 2009/6/6 Robert Hancock <hancockrwd@xxxxxxxxx>: > >>> > >>> Thing is somehow the GTM detection isn't working now and it apparently > >>> was > >>> in 2.6.27.1. I'm not seeing any patches to pata_via or libata-acpi that > >>> seem > >>> like they would affect this offhand. Grozdan, would you be able to try > >>> git > >>> bisect to try to figure out what changed the behavior? > >>> > >>> CCing Tejun in case he has any ideas.. > >>> > >> > >> I've no idea how and where to do a git bisect so if someone is willing > >> to explain in simple steps, I can try... > > > > Linus's post on here is a pretty simple explanation: > > > > http://kerneltrap.org/node/11753 > > > > Yes, it's clear to someone who's familiar with git but not to a noob > like me. Where do I run this git? After it's finished what to do next? > How many times do I have to compile kernels? Which kernels exactly? > After booting a "bad" kernel, what then? etc... From reading the > article, the guy has to compile 14!! times just to catch a problem > between kernel 2.6.21 and 2.6.22. > The article presumes the simple case of a single commit being the problem. If the problem involves more than one. . . Think of doing a binary search in a list of values with duplicate entries. ;) > I guess in my case I'll have to > compile a lot more than 14 times to catch something between kernel > 2.6.27 and 2.6.30 and honestly I don't have time for this right now. > Yes, it can get to be time-consuming unless your lucky. > However, I did a diff between the pata_via driver of kernel 2.6.27 and > 2.6.30 and there have been changes to it but I'm not sure if they > affect the cable detection... > That's a start. Now if you knew what you where looking for... (No offense intended - "diff" doesn't place "here I am" markers.) The machine I am doing my own tests on uses the pata_via driver and it detects the udma66 disk drive as a udma33 - - - But finding this is way down on my list of things to look for - Someone else is welcome to beat me to it. Mike > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > > -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
