Re: Sparc32 not working:2.6.23-rc1 (git commit 1e4dcd22efa7d24f637ab2ea3a77dd65774eb005)
On Sun, 29 Jul 2007, Adrian Bunk wrote: On Sun, Jul 29, 2007 at 07:26:29PM +0100, Mark Fortescue wrote: ... I am going to try to cherry pick a set of commits to see if I can't get a better idear of where the memory corruption on sun4c is coming from. Build problems sue to the DMA changes make git bisecting un-usable untill I have found out which patches fix the DMA build issues. You have any known-good kernel? Boot back into this kernel for bisecting and compiling the kernels for bisecting there. As I said, bisecting does not work if you can't build the kernel because of un-defined symbols spanning most of the revisions you are interested in. I have isolated the revisions that do not build so I should be able to cerry pick a commit/commits that fixes the build issues. Once done, I will be able to investigate the original issue. If it were practical to do a build test on all supported platforms before submitting patches then this would not be so much of an issue but ... cu Adrian -- "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed - To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Sparc32 not working:2.6.23-rc1 (git commit 1e4dcd22efa7d24f637ab2ea3a77dd65774eb005)
On Sun, Jul 29, 2007 at 07:26:29PM +0100, Mark Fortescue wrote: >... > I am going to try to cherry pick a set of commits to see if I can't get a > better idear of where the memory corruption on sun4c is coming from. Build > problems sue to the DMA changes make git bisecting un-usable untill I have > found out which patches fix the DMA build issues. You have any known-good kernel? Boot back into this kernel for bisecting and compiling the kernels for bisecting there. cu Adrian -- "Is there not promise of rain?" Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. "Only a promise," Lao Er said. Pearl S. Buck - Dragon Seed - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Sparc32 not working:2.6.23-rc1 (git commit 1e4dcd22efa7d24f637ab2ea3a77dd65774eb005)
On Sun, 29 Jul 2007, Krzysztof Helt wrote: On Sun, 29 Jul 2007 00:21:06 +0100 (BST) Mark Fortescue <[EMAIL PROTECTED]> wrote: Hi Krzysztof, There have been lots of changes to the DMA system (git bisect is not viable form my working 2.6.22 kernel as the dma changes kill the build for over half the posible commits to check). It could be a side effect of these changes. It is not DMA I suppose. It does not happen in any specific place. It is easy to trigger by loading and unloading the sunlance module, but it hangs linux in other places (init process, console login). It happens only in SMP. If it happens in the sunlance module it happens in sparc_lance_probe_one() (in probing function). I thought it is due to openprom accesses so I commented them out (and put hardcoded values there). No real change. It is always in the probe_one method before any DMA is started. Sometimes it drops me to the prom prompt. I am not very experienced so I was able only to find (ctrace) that the prompt was called in the method spwin_bad_ustack_from_kernel() which got there from mna_handler (misaligned access) through kernel_unaligned_trap(). I don't know which function triggered the unaligned access. The %o register values sent to the kernel_unaligned_trap() are outside addresses from System.map and outside addresses of loaded (or just loaded the sunlance) modules. This is where I need help. How can I find where the misaligned access happened? The is a memory corruption issue on Sparc32 - sun4c (I am going to try and track it done over the next few days). It sounds like it may affect more than just sun4c issue. Try going back to v2.6.22 and then appling f61698e6489f229f9fcfe29e68f228389a772993 - memset.S error, 196bffa5dc3181897bd32e41415ec0db8dbab5e7 - entry.S delay loops, f3c681c028846bd5d39f563909409832a295ca69 - Serial Console Locking (My last working kernel is v2.6.22 Commit eb6bf6bfb580afaf1e1a1d30cba17a078530cf4 with the first of the above two patches applied and some additional ones that fix verious sun partition/UFS filing sustem issues). I am going to try to cherry pick a set of commits to see if I can't get a better idear of where the memory corruption on sun4c is coming from. Build problems sue to the DMA changes make git bisecting un-usable untill I have found out which patches fix the DMA build issues. Regards, Krzysztof - To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Sparc32 not working:2.6.23-rc1 (git commit 1e4dcd22efa7d24f637ab2ea3a77dd65774eb005)
On Sun, 29 Jul 2007, Krzysztof Helt wrote: On Sun, 29 Jul 2007 00:21:06 +0100 (BST) Mark Fortescue [EMAIL PROTECTED] wrote: Hi Krzysztof, There have been lots of changes to the DMA system (git bisect is not viable form my working 2.6.22 kernel as the dma changes kill the build for over half the posible commits to check). It could be a side effect of these changes. It is not DMA I suppose. It does not happen in any specific place. It is easy to trigger by loading and unloading the sunlance module, but it hangs linux in other places (init process, console login). It happens only in SMP. If it happens in the sunlance module it happens in sparc_lance_probe_one() (in probing function). I thought it is due to openprom accesses so I commented them out (and put hardcoded values there). No real change. It is always in the probe_one method before any DMA is started. Sometimes it drops me to the prom prompt. I am not very experienced so I was able only to find (ctrace) that the prompt was called in the method spwin_bad_ustack_from_kernel() which got there from mna_handler (misaligned access) through kernel_unaligned_trap(). I don't know which function triggered the unaligned access. The %o register values sent to the kernel_unaligned_trap() are outside addresses from System.map and outside addresses of loaded (or just loaded the sunlance) modules. This is where I need help. How can I find where the misaligned access happened? The is a memory corruption issue on Sparc32 - sun4c (I am going to try and track it done over the next few days). It sounds like it may affect more than just sun4c issue. Try going back to v2.6.22 and then appling f61698e6489f229f9fcfe29e68f228389a772993 - memset.S error, 196bffa5dc3181897bd32e41415ec0db8dbab5e7 - entry.S delay loops, f3c681c028846bd5d39f563909409832a295ca69 - Serial Console Locking (My last working kernel is v2.6.22 Commit eb6bf6bfb580afaf1e1a1d30cba17a078530cf4 with the first of the above two patches applied and some additional ones that fix verious sun partition/UFS filing sustem issues). I am going to try to cherry pick a set of commits to see if I can't get a better idear of where the memory corruption on sun4c is coming from. Build problems sue to the DMA changes make git bisecting un-usable untill I have found out which patches fix the DMA build issues. Regards, Krzysztof - To unsubscribe from this list: send the line unsubscribe sparclinux in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Sparc32 not working:2.6.23-rc1 (git commit 1e4dcd22efa7d24f637ab2ea3a77dd65774eb005)
On Sun, Jul 29, 2007 at 07:26:29PM +0100, Mark Fortescue wrote: ... I am going to try to cherry pick a set of commits to see if I can't get a better idear of where the memory corruption on sun4c is coming from. Build problems sue to the DMA changes make git bisecting un-usable untill I have found out which patches fix the DMA build issues. You have any known-good kernel? Boot back into this kernel for bisecting and compiling the kernels for bisecting there. cu Adrian -- Is there not promise of rain? Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. Only a promise, Lao Er said. Pearl S. Buck - Dragon Seed - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Re: Sparc32 not working:2.6.23-rc1 (git commit 1e4dcd22efa7d24f637ab2ea3a77dd65774eb005)
On Sun, 29 Jul 2007, Adrian Bunk wrote: On Sun, Jul 29, 2007 at 07:26:29PM +0100, Mark Fortescue wrote: ... I am going to try to cherry pick a set of commits to see if I can't get a better idear of where the memory corruption on sun4c is coming from. Build problems sue to the DMA changes make git bisecting un-usable untill I have found out which patches fix the DMA build issues. You have any known-good kernel? Boot back into this kernel for bisecting and compiling the kernels for bisecting there. As I said, bisecting does not work if you can't build the kernel because of un-defined symbols spanning most of the revisions you are interested in. I have isolated the revisions that do not build so I should be able to cerry pick a commit/commits that fixes the build issues. Once done, I will be able to investigate the original issue. If it were practical to do a build test on all supported platforms before submitting patches then this would not be so much of an issue but ... cu Adrian -- Is there not promise of rain? Ling Tan asked suddenly out of the darkness. There had been need of rain for many days. Only a promise, Lao Er said. Pearl S. Buck - Dragon Seed - To unsubscribe from this list: send the line unsubscribe sparclinux in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
