Re: Mac Mini G4 hang on boot with git master
On 17/03/2019 16:25, christophe leroy wrote: >> This was a weird one: bisecting directly from git master gave a nonsense >> result, >> however by manually rebasing Michael's PR onto my last known good commit >> from master >> I was able to finally pin it down to this commit: >> >> >> 7a0d6955f3f7a4250da63d528bfff7a9c91b5725 is the first bad commit >> commit 7a0d6955f3f7a4250da63d528bfff7a9c91b5725 >> Author: Christophe Leroy >> Date: Thu Feb 21 10:37:55 2019 + >> >> powerpc/6xx: Store PGDIR physical address in a SPRG >> >> Use SPRN_SPRG2 to store the current thread PGDIR and >> avoid reading thread_struct.pgdir at every TLB miss. >> >> Signed-off-by: Christophe Leroy >> Signed-off-by: Michael Ellerman >> >> > > Hi, > > The fix is there: > > https://patchwork.ozlabs.org/patch/1053385/ > > Christophe Hi Christophe, Thank you! I've tried the patch here and have confirmed that it fixes the problem with the hang on boot. ATB, Mark.
Re: Mac Mini G4 hang on boot with git master
Le 17/03/2019 à 15:15, Mark Cave-Ayland a écrit : On 15/03/2019 13:37, Mark Cave-Ayland wrote: Hi all, I've just done a git pull and rebuilt master on my Mac Mini G4 in order to test Michael's merge of my KVM PR fix, and unfortunately my kernel now hangs on boot :( My last working git checkout was somewhere around the 5.0-rc stage, so I suspect it's something that's been merged for 5.1. The hang occurs just after the boot console is disabled which makes me wonder if something is going wrong during PCI bus enumeration. Does anyone have an idea as to what may be causing this? I can obviously bisect it down, but on slow hardware it can take some time... This was a weird one: bisecting directly from git master gave a nonsense result, however by manually rebasing Michael's PR onto my last known good commit from master I was able to finally pin it down to this commit: 7a0d6955f3f7a4250da63d528bfff7a9c91b5725 is the first bad commit commit 7a0d6955f3f7a4250da63d528bfff7a9c91b5725 Author: Christophe Leroy Date: Thu Feb 21 10:37:55 2019 + powerpc/6xx: Store PGDIR physical address in a SPRG Use SPRN_SPRG2 to store the current thread PGDIR and avoid reading thread_struct.pgdir at every TLB miss. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Hi, The fix is there: https://patchwork.ozlabs.org/patch/1053385/ Christophe --- L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast. https://www.avast.com/antivirus
Re: Mac Mini G4 hang on boot with git master
On 15/03/2019 13:37, Mark Cave-Ayland wrote: > Hi all, > > I've just done a git pull and rebuilt master on my Mac Mini G4 in order to > test > Michael's merge of my KVM PR fix, and unfortunately my kernel now hangs on > boot :( > > My last working git checkout was somewhere around the 5.0-rc stage, so I > suspect it's > something that's been merged for 5.1. > > The hang occurs just after the boot console is disabled which makes me wonder > if > something is going wrong during PCI bus enumeration. Does anyone have an idea > as to > what may be causing this? I can obviously bisect it down, but on slow > hardware it can > take some time... This was a weird one: bisecting directly from git master gave a nonsense result, however by manually rebasing Michael's PR onto my last known good commit from master I was able to finally pin it down to this commit: 7a0d6955f3f7a4250da63d528bfff7a9c91b5725 is the first bad commit commit 7a0d6955f3f7a4250da63d528bfff7a9c91b5725 Author: Christophe Leroy Date: Thu Feb 21 10:37:55 2019 + powerpc/6xx: Store PGDIR physical address in a SPRG Use SPRN_SPRG2 to store the current thread PGDIR and avoid reading thread_struct.pgdir at every TLB miss. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman ATB, Mark.
Re: Mac Mini G4 hang on boot with git master
Mark, On Fri, Mar 15, 2019 at 3:08 PM Mark Cave-Ayland wrote: > > Hi all, > > I've just done a git pull and rebuilt master on my Mac Mini G4 in order to > test > Michael's merge of my KVM PR fix, and unfortunately my kernel now hangs on > boot :( Ouch :( > My last working git checkout was somewhere around the 5.0-rc stage, so I > suspect it's > something that's been merged for 5.1. OK. My last kernel is also somewhere around here on same hardware. > The hang occurs just after the boot console is disabled which makes me wonder > if > something is going wrong during PCI bus enumeration. Does anyone have an idea > as to > what may be causing this? I can obviously bisect it down, but on slow > hardware it can > take some time... When doing git bisect I compile from my amd64 machine using: make O=g4 ARCH=powerpc CROSS_COMPILE=powerpc-linux-gnu- my_defconfig make -j8 O=g4 ARCH=powerpc CROSS_COMPILE=powerpc-linux-gnu- bindeb-pkg scp *image*.deb macminig4: On Debian simply install: # apt-get install crossbuild-essential-powerpc > > ATB, > > Mark.
