Bug#1029968: Info received (Bug#1029968: Info received (Bug#1029968: Acknowledgement (bttv/v4l: WARNING: CPU: 6 PID: 6164 at mm/vmalloc.c:487 __vmap_pages_range_noflush+0x3e0/0x4d0)))

2023-02-01 Thread Dr. David Alan Gilbert
Confirmed still happens on upstream 6.2.0-rc6 -- -Open up your eyes, open up your mind, open up your code --- / Dr. David Alan Gilbert| Running GNU/Linux | Happy \ \dave @ treblig.org | | In Hex / \

Bug#1029968: Acknowledgement (bttv/v4l: WARNING: CPU: 6 PID: 6164 at mm/vmalloc.c:487 __vmap_pages_range_noflush+0x3e0/0x4d0)

2023-02-01 Thread Dr. David Alan Gilbert
* Diederik de Haas (didi.deb...@cknow.org) wrote: > Thanks for that thorough analyses! Thanks for the reply, > If you're 'penguin42' on IRC, Yep, that's me. > then I'd suggest to present your findings to > io...@lists.linux.dev as both the author and the reviewer are highly likely >

Bug#1029968: Acknowledgement (bttv/v4l: WARNING: CPU: 6 PID: 6164 at mm/vmalloc.c:487 __vmap_pages_range_noflush+0x3e0/0x4d0)

2023-01-31 Thread Diederik de Haas
On Wednesday, 1 February 2023 02:52:13 CET Dr. David Alan Gilbert wrote: > bisected: > GOOD [37fcacb50be7071d146144a6c5c5bf0194b9a1cf] phy: PHY_FSL_LYNX_28G should > depend on ARCH_LAYERSCAPE BAD [f5ff79fddf0efecca538046b5cc20fb3ded2ec4f] > dma-mapping: remove CONFIG_DMA_REMAP GOOD >

Bug#1029968: Info received (Bug#1029968: Acknowledgement (bttv/v4l: WARNING: CPU: 6 PID: 6164 at mm/vmalloc.c:487 __vmap_pages_range_noflush+0x3e0/0x4d0))

2023-01-31 Thread Dr. David Alan Gilbert
Note that the oops at this bisect point is messier than on the newer kernels; the newer kernels hit a WARN in __vmap_pages_range_noflush, where as at this point it slams into a BUG, but the rest of the backtrace is similar; [ 78.988024] BUG: unable to handle page fault for address:

Bug#1029968: Acknowledgement (bttv/v4l: WARNING: CPU: 6 PID: 6164 at mm/vmalloc.c:487 __vmap_pages_range_noflush+0x3e0/0x4d0)

2023-01-31 Thread Dr. David Alan Gilbert
bisected: GOOD [37fcacb50be7071d146144a6c5c5bf0194b9a1cf] phy: PHY_FSL_LYNX_28G should depend on ARCH_LAYERSCAPE BAD [f5ff79fddf0efecca538046b5cc20fb3ded2ec4f] dma-mapping: remove CONFIG_DMA_REMAP GOOD [e62c17f0455a74b182ce6373e2777817256afaa1] MAINTAINERS: update maintainer list of DMA MAPPING

Bug#1029968: Acknowledgement (bttv/v4l: WARNING: CPU: 6 PID: 6164 at mm/vmalloc.c:487 __vmap_pages_range_noflush+0x3e0/0x4d0)

2023-01-30 Thread Dr. David Alan Gilbert
Upstream 5.17 works Upstream 5.18 fails (with intel_iommu=on) Let the bisect begin. -- -Open up your eyes, open up your mind, open up your code --- / Dr. David Alan Gilbert| Running GNU/Linux | Happy \ \dave @ treblig.org | |

Bug#1029968: Acknowledgement (bttv/v4l: WARNING: CPU: 6 PID: 6164 at mm/vmalloc.c:487 __vmap_pages_range_noflush+0x3e0/0x4d0)

2023-01-30 Thread Dr. David Alan Gilbert
This is IOMMU related. Upstream 6.1 and 5.18 *do* exhibit the bug, but only with intel_iommu=on where as Debian seems to default it to on. -- -Open up your eyes, open up your mind, open up your code --- / Dr. David Alan Gilbert| Running GNU/Linux | Happy \ \

Bug#1029968: Acknowledgement (bttv/v4l: WARNING: CPU: 6 PID: 6164 at mm/vmalloc.c:487 __vmap_pages_range_noflush+0x3e0/0x4d0)

2023-01-29 Thread Dr. David Alan Gilbert
I built upstream kernels 5.18.0 and 6.1.0 and both of them work for me. Which makes life much more painful to find. -- -Open up your eyes, open up your mind, open up your code --- / Dr. David Alan Gilbert| Running GNU/Linux | Happy \ \dave @ treblig.org |

Bug#1029968: Acknowledgement (bttv/v4l: WARNING: CPU: 6 PID: 6164 at mm/vmalloc.c:487 __vmap_pages_range_noflush+0x3e0/0x4d0)

2023-01-29 Thread Dr. David Alan Gilbert
WORKS https://snapshot.debian.org/archive/debian/20220601T031637Z/pool/main/l/linux-signed-amd64/linux-image-5.17.0-1-amd64_5.17.3-1_amd64.deb 5.17.0-1-amd64 #1 SMP PREEMPT Debian 5.17.3-1 So I think it's time to move upstream and bisect between 5.17 and 5.18 Dave -- -Open up your