On Wed, 2015-07-08 at 20:00 +0200, Christian Zigotzky wrote: > Dear Linuxppc-dev mailing list, > > I used git bisect and found out that the following commit is the problem. > > commit 3ceaccdf92073d193f0bfbe24280dd736e3fed86 > Author: Dave Hansen <dave.han...@linux.intel.com>
There is no way that commit affects anything on that platform, it only changes a file in arch/x86 that isn't compiled on a powerpc build. You must have made a mistake in your bisection, possibly the one "sometimes boots" should be considered good, but I can't say for sure. Michael has a PA6T board at work, so I assume he will see if he can reproduce. Ben. > > Log: > > git clone > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git linux-git > > git bisect start b953c0d234bc72e8489d3bf51a276c5c4ec85345 (Linux 4.1) > > git bisect bad d770e558e21961ad6cfdf0ff7df0eb5d7d4f0754 (Linux 4.2-rc1) > > Output: > > Bisecting: 6261 revisions left to test after this (roughly 13 steps) > [4570a37169d4b44d316f40b2ccc681dc93fedc7b] Merge tag 'sound-4.2-rc1' of > git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound > > ---- > > git bisect bad > > Output: > > Bisecting: 3295 revisions left to test after this (roughly 12 steps) > [4e241557fc1cb560bd9e77ca1b4a9352732a5427] Merge tag 'for-linus' of > git://git.kernel.org/pub/scm/virt/kvm/kvm > > ---- > > git bisect bad > > Output: > > Bisecting: 1625 revisions left to test after this (roughly 11 steps) > [44d21c3f3a2ef2f58b18bda64c52c99e723f3f4a] Merge > git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 > > ---- > > git bisect bad > > Output: > > Bisecting: 712 revisions left to test after this (roughly 10 steps) > [e75c73ad64478c12b3a44b86a3e7f62a4f65b93e] Merge branch > 'x86-fpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip > > ---- > > git bisect bad (sometimes the kernel boots but the mouse doesn't work) > > Output: > > Bisecting: 371 revisions left to test after this (roughly 9 steps) > [c58267e9fa7b0345dd9006939254701e3622ca6a] Merge branch > 'perf-core-for-linus' of > git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip > > ---- > > git bisect good > > Output: > > Bisecting: 185 revisions left to test after this (roughly 8 steps) > [59a36d16be8f9f68410f1bd396577fb7f31ae877] x86/fpu: Factor out > fpu/regset.h from fpu/internal.h > > ---- > > git bisect good > > Output: > > Bisecting: 93 revisions left to test after this (roughly 7 steps) > [23b7776290b10297fe2cae0fb5f166a4f2c68121] Merge branch > 'sched-core-for-linus' of > git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip > > ---- > > git bisect good > > Output: > > Bisecting: 46 revisions left to test after this (roughly 6 steps) > [0c4109bec0a6cde471bef3a21cd6f8384a614469] x86/fpu/xstate: Fix up bad > get_xsave_addr() assumptions > > ---- > > git bisect good > > Output: > > Bisecting: 19 revisions left to test after this (roughly 5 steps) > [cfe3eceb7a2eb91284d5605c5315249bb165e9d3] Merge branch > 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip > > ---- > > git bisect good > > Output: > > Bisecting: 9 revisions left to test after this (roughly 3 steps) > [cd4996dce18b619bd7b3acf75c91f49c77f05a97] x86/mpx: Trace allocation of > new bounds tables > > ---- > > git bisect good > > Output: > > Bisecting: 4 revisions left to test after this (roughly 2 steps) > [613fcb7d3c79ec25b5913a6aa974c9047c31e68c] x86/mpx: Support 32-bit > binaries on 64-bit kernels > > ---- > > git bisect good > > Output: > > Bisecting: 2 revisions left to test after this (roughly 1 step) > [bea03c50b871a2fa922f31ad7c9993bb4fc7b192] x86/mpx: Do not count MPX > VMAs as neighbors when unmapping > > ---- > > git bisect bad (sometimes the kernel boots but the mouse doesn't work) > > Output: > > Bisecting: 0 revisions left to test after this (roughly 0 steps) > [3ceaccdf92073d193f0bfbe24280dd736e3fed86] x86/mpx: Rewrite the unmap code > > ---- > > git bisect bad (sometimes the kernel boots but the mouse doesn't work) > > Output: > > 3ceaccdf92073d193f0bfbe24280dd736e3fed86 is the first bad commit > commit 3ceaccdf92073d193f0bfbe24280dd736e3fed86 > Author: Dave Hansen <dave.han...@linux.intel.com> > Date: Sun Jun 7 11:37:06 2015 -0700 > > x86/mpx: Rewrite the unmap code > > The MPX code needs to clear out bounds tables for memory which > is no longer in use. We do this when a userspace mapping is > torn down (unmapped). > > There are two modes: > > 1. An entire bounds table becomes unused, and can be freed > and its pointer removed from the bounds directory. This > happens either when a large mapping is torn down, or when > a small mapping is torn down and it is the last mapping > "covered" by a bounds table. > > 2. Only part of a bounds table becomes unused, in which case > we free the backing memory as if MADV_DONTNEED was called. > > The old code was a spaghetti mess of "edge" bounds tables > where the edges were handled specially, even if we were > unmapping an entire one. Non-edge bounds tables are always > fully unmapped, but share a different code path from the edge > ones. The old code had a bug where it was unmapping too much > memory. I worked on fixing it for two days and gave up. > > I didn't write the original code. I didn't particularly like > it, but it worked, so I left it. After my debug session, I > realized it was undebuggagle *and* buggy, so out it went. > > I also wrote a new unmapping test program which uncovers bugs > pretty nicely. > > Signed-off-by: Dave Hansen <dave.han...@linux.intel.com> > Reviewed-by: Thomas Gleixner <t...@linutronix.de> > Cc: Andrew Morton <a...@linux-foundation.org> > Cc: Dave Hansen <d...@sr71.net> > Cc: H. Peter Anvin <h...@zytor.com> > Cc: Linus Torvalds <torva...@linux-foundation.org> > Cc: Peter Zijlstra <pet...@infradead.org> > Link: > http://lkml.kernel.org/r/20150607183706.dcaec...@viggo.jf.intel.com > Signed-off-by: Ingo Molnar <mi...@kernel.org> > > :040000 040000 d6809ce6030ff42a5813da4a94971888d8ad67c9 > a0514265bbf313aba996e5606c00881acc62b220 M arch > > ---- > > Cheers, > > Christian > > > On 07 July 2015 2:44 PM, Christian Zigotzky wrote: > > > > > > Error messages images: > > > > http://forum.hyperion-entertainment.biz/download/file.php?id=1772&mode=view > > > > http://forum.hyperion-entertainment.biz/download/file.php?id=1774&mode=view > > > > > > -- Christian > > > > On 07 July 2015 12:50 PM Christian Zigotzky wrote: > >> Dear Linuxppc-dev mailing list, > >> > >> I compiled a kernel from the git on Tuesday 23rd of June 2015. It > >> didn't boot with my PASEMI PA6T board. > >> > >> Error messages: > >> > >> Oops: Kernel access of bad area, sig: 11 [#1] > >> > >> .sb600_8259_cascade+0x4c/0xac (unreliable) > >> .schedule+0x74/0x9c (unreliable) > >> > >> Kernel panic - not syncing: Fatal exception in interrupt > >> > >> I compiled the RC1 of kernel 4.2 last Sunday. Unfortunately it didn't > >> boot either. The kernel 4.1 and 4.1.1 boot without any problems. > >> > >> Could someone please explain me why it doesn't boot anymore? > >> > >> I would like to thank you very much in advance for helping me. > >> > >> If you have any questions, please don't hesitate to ask. I'm looking > >> forward to getting your reply. > >> > >> > >> Kind regards, > >> > >> Christian Zigotzky > >> > >> > >> _______________________________________________ > >> 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 > > _______________________________________________ > 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
