Re: Can't boot 2.6.30 powerpc kernel under qemu.
On Mon, 2009-06-29 at 18:34 -0500, Rob Landley wrote: Which suggested that the problem was the new CONFIG_PPC_OF_BOOT_TRAMPOLINE symbol wasn't set, and once I switched that on it started working again. Ah, I might have forgot to set it to default y... linuxppc-dev@lists.ozlabs.org is the one you want for this: https://lists.ozlabs.org/listinfo/linuxppc-dev Cool! Is there a reason it's hidden? (Or at least not listed in either vger.kernel.org's list info page or in the Maling lists page linked from ozlabs.org's top level web page.) Just curious, I couldn't find it when I looked in the obvious (to me) places. It's a glitch of the transition from ozlabs.org to lists.ozlabs.org for lists... they haven't all moved over yet so it's still a bit messy. Rob P.S. Yes I tried google: top hit for linux powerpc list is penguinppc.org, which links to mailing lists on the right which is the ozlabs.org page that doesn't list linuxppc-dev. In fact the entire first page of google hits for that search doesn't give a hint of the existence of that list, although some of the later ones might if I clicked through more of them... I'll check with Stephen if we can get the ozlabs.org page a link to the new lists.ozlabs.org or something like that... Cheers, Ben. ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: Can't boot 2.6.30 powerpc kernel under qemu.
On Tue, 2009-06-30 at 10:24 +1000, Michael Ellerman wrote: On Mon, 2009-06-29 at 18:34 -0500, Rob Landley wrote: Which suggested that the problem was the new CONFIG_PPC_OF_BOOT_TRAMPOLINE symbol wasn't set, and once I switched that on it started working again. What defconfig are you using? It sounds like maybe something should be 'select'ing OF_BOOT_TRAMPOLINE. Right, pmac, pseries and chrp probably ... though I don't like select for a user-visible option, I'd rather fix things if I inadvertently forgot the default y here, after all, one may want to do a minimum kdump kernel without prom_init.c in it. Cheers, Ben. linuxppc-dev@lists.ozlabs.org is the one you want for this: https://lists.ozlabs.org/listinfo/linuxppc-dev Cool! Is there a reason it's hidden? (Or at least not listed in either vger.kernel.org's list info page or in the Maling lists page linked from ozlabs.org's top level web page.) Just curious, I couldn't find it when I looked in the obvious (to me) places. It's not hidden, it's just in the process of moving from ozlabs.org to lists.ozlabs.org - and it's a bit hard to find in the process. I've updated the ozlabs.org page to point to it in the meantime. It's also in maintainers :D LINUX FOR POWERPC (32-BIT AND 64-BIT) P: Benjamin Herrenschmidt M: b...@kernel.crashing.org P: Paul Mackerras M: pau...@samba.org W: http://www.penguinppc.org/ L: linuxppc-...@ozlabs.org T: git git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc.git S: Supported cheers ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: Can't boot 2.6.30 powerpc kernel under qemu.
On Saturday 27 June 2009 21:33:09 Jeremy Kerr wrote: Hi Rob, I bisected the problem in the linux kernel repository, and wound up here: 60ee031940c1b09c137b617a8829e2f081961fe0 is first bad commit commit 60ee031940c1b09c137b617a8829e2f081961fe0 Author: Jeremy Kerr j...@ozlabs.org Date: Tue Feb 17 11:44:14 2009 +1100 powerpc/spufs: Use correct return value for spu_handle_mm_fault I think it's very unlikely that this commit would be causing the problem, as qemu doesn't have any SPEs (they're specific to the Cell architecture), which would be required to hit this code. Also, you're not compiling with CONFIG_SPU_BASE, so the file that this changed shouldn't even be built. Yeah, it seemed odd. That's why I needed help. :) Perhaps try the bisect again? Sorry about that. I suck at git. Part of the reason is that git bisect assumes that good always comes before bad in the repository, so if you're looking for the patch that _fixed_ a bug (I.E. good == new and bad == old), you have to reverse 'em to humor git bisect. I had to do that this time to patch an intermediate version that build breaks, which git bisect run called skip on over a dozen times without noticeable progress. If good and bad then mean the opposite on the _next_ bisect, I tend to get 'em confused occasionally. (Especially when I've hit three or more unrelated bugs in the same bisect run. In this case the build break in kmap_atomic_prot, whatever memory glitch is corrupting the squashfs root filesystem image and spamming the console about it, and this bug. Oh, and the really _fun_ part is that the squashfs bug only reproduces about half the time. If you run the same binary twice, sometimes it'll work and sometimes it'll spam squashfs errors to the console. Wheee...) Anyway, on something like my fifth attempt I managed to bisect it to: 28794d34ecb6815a3fa0a4256027c9b081a17c5f is first bad commit commit 28794d34ecb6815a3fa0a4256027c9b081a17c5f Author: Benjamin Herrenschmidt b...@kernel.crashing.org Date: Tue Mar 10 17:53:27 2009 + powerpc/kconfig: Kill PPC_MULTIPLATFORM CONFIG_PPC_MULTIPLATFORM is a remain of the pre-powerpc days and isn't really meaningful anymore. It was basically equivalent to PPC64 || 6xx. This removes it along with the following changes: - 32-bit platforms that relied on PPC32 PPC_MULTIPLATFORM now rely on 6xx which is what they want anyway. - A new symbol, PPC_BOOK3S, is defined that represent compliance with the Server variant of the architecture. This is set when either 6xx or PPC64 is set and open the door for future BOOK3E 64-bit. - 64-bit platforms that relied on PPC64 PPC_MULTIPLATFORM now use PPC64 PPC_BOOK3S - A separate and selectable CONFIG_PPC_OF_BOOT_TRAMPOLINE option is now used to control the use of prom_init.c Signed-off-by: Benjamin Herrenschmidt b...@kernel.crashing.org Which suggested that the problem was the new CONFIG_PPC_OF_BOOT_TRAMPOLINE symbol wasn't set, and once I switched that on it started working again. linuxppc-dev@lists.ozlabs.org is the one you want for this: https://lists.ozlabs.org/listinfo/linuxppc-dev Cool! Is there a reason it's hidden? (Or at least not listed in either vger.kernel.org's list info page or in the Maling lists page linked from ozlabs.org's top level web page.) Just curious, I couldn't find it when I looked in the obvious (to me) places. Rob P.S. Yes I tried google: top hit for linux powerpc list is penguinppc.org, which links to mailing lists on the right which is the ozlabs.org page that doesn't list linuxppc-dev. In fact the entire first page of google hits for that search doesn't give a hint of the existence of that list, although some of the later ones might if I clicked through more of them... -- Latency is more important than throughput. It's that simple. - Linus Torvalds ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: Can't boot 2.6.30 powerpc kernel under qemu.
On Mon, Jun 29, 2009 at 06:34:06PM -0500, Rob Landley wrote: Cool! Is there a reason it's hidden? (Or at least not listed in either vger.kernel.org's list info page Because it's not hosted on vger :( ... I guess we're controll freaks! :D or in the Maling lists page linked from ozlabs.org's top level web page.) Ahh this is becuase we're currently on the process of moving the lists to lists.ozlabs.org, there is an alias in place so the old address still works. So at some level it's just bad timing :( We'll do what we can to make this easier during the transition. Just curious, I couldn't find it when I looked in the obvious (to me) places. Not to be flipant but it's in the MAINTAINERS file: --- LINUX FOR POWERPC (32-BIT AND 64-BIT) P: Benjamin Herrenschmidt M: b...@kernel.crashing.org P: Paul Mackerras M: pau...@samba.org W: http://www.penguinppc.org/ L: linuxppc-...@ozlabs.org T: git git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc.git S: Supported --- P.S. Yes I tried google: top hit for linux powerpc list is penguinppc.org, which links to mailing lists on the right which is the ozlabs.org page that doesn't list linuxppc-dev. In fact the entire first page of google hits for that search doesn't give a hint of the existence of that list, although some of the later ones might if I clicked through more of them... Rats, not really sure what we can do about that :( Yours Tony ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: Can't boot 2.6.30 powerpc kernel under qemu.
On Mon, 2009-06-29 at 18:34 -0500, Rob Landley wrote: Which suggested that the problem was the new CONFIG_PPC_OF_BOOT_TRAMPOLINE symbol wasn't set, and once I switched that on it started working again. What defconfig are you using? It sounds like maybe something should be 'select'ing OF_BOOT_TRAMPOLINE. linuxppc-dev@lists.ozlabs.org is the one you want for this: https://lists.ozlabs.org/listinfo/linuxppc-dev Cool! Is there a reason it's hidden? (Or at least not listed in either vger.kernel.org's list info page or in the Maling lists page linked from ozlabs.org's top level web page.) Just curious, I couldn't find it when I looked in the obvious (to me) places. It's not hidden, it's just in the process of moving from ozlabs.org to lists.ozlabs.org - and it's a bit hard to find in the process. I've updated the ozlabs.org page to point to it in the meantime. It's also in maintainers :D LINUX FOR POWERPC (32-BIT AND 64-BIT) P: Benjamin Herrenschmidt M: b...@kernel.crashing.org P: Paul Mackerras M: pau...@samba.org W: http://www.penguinppc.org/ L: linuxppc-...@ozlabs.org T: git git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc.git S: Supported cheers signature.asc Description: This is a digitally signed message part ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
