Confirmed still happens on upstream 6.2.0-rc6
--
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/ Dr. David Alan Gilbert| Running GNU/Linux | Happy \
\dave @ treblig.org | | In Hex /
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* 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
>
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
>
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:
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
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 | |
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 \
\
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 |
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
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