Hi folks, after some trial and error and with the help from Ralf Ramsauer (thanks a bunch Ralf!) we figured out that removing CONFIG_ARM_LPAE eliminates kernel panic. Here is the kernel config diff: kvt@rage ~ $ diff kernel.config.old /usr/src/linux/.config 236d235 < CONFIG_ZONE_DMA=y 240c239 < CONFIG_PGTABLE_LEVELS=3 --- > CONFIG_PGTABLE_LEVELS=2 279d277 < # CONFIG_ARCH_AXXIA is not set 347c345 < CONFIG_ARM_LPAE=y --- > # CONFIG_ARM_LPAE is not set 411a410 > # CONFIG_VMSPLIT_3G_OPT is not set 434a434 > CONFIG_CPU_SW_DOMAIN_PAN=y 436,437d435 < CONFIG_SYS_SUPPORTS_HUGETLBFS=y < CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y 567d564 < CONFIG_HAVE_RCU_TABLE_FREE=y 702d698 < CONFIG_HAVE_FAST_GUP=y 709d704 < CONFIG_PHYS_ADDR_T_64BIT=y 713d707 < # CONFIG_TRANSPARENT_HUGEPAGE is not set 728d721 < CONFIG_ARCH_HAS_PTE_SPECIAL=y 3369a3363 > # CONFIG_USB_FUSB300 is not set 4436d4429 < # CONFIG_LIBNVDIMM is not set 4537d4529 < # CONFIG_HUGETLBFS is not set 4801a4794 > # CONFIG_CRYPTO_DEV_HIFN_795X is not set 4883d4875 < CONFIG_ARCH_DMA_ADDR_T_64BIT=y 4887,4889d4878 < CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE=y < CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU=y < CONFIG_SWIOTLB=y kvt@rage ~ $ Thanks, Kirill. On Wed, Feb 26, 2020 at 8:34 AM Kirill Timofeev <kt97679@xxxxxxxxx> wrote: > > I'm sorry if you will see this as a duplicate, resending as a plain > text message. > > Hi folks, > > I run home server on the nvidia tegra tk1 using gentoo: > > Linux rage 5.5.6-gentoo #1 SMP PREEMPT Tue Feb 25 12:40:17 PST 2020 > armv7l ARMv7 Processor rev 3 (v7l) NVIDIA Tegra SoC (Flattened Device > Tree) GNU/Linux > > This server runs nginx on both 80 and 443. I recently was updating my > let's encrypt certificate and it failed because plain http was not > working (while https was working ok): > > kvt@joy:~$ curl -s http://a0.twilightparadox.com|hd > 00000000 89 1f 00 00 02 2e 00 00 00 00 00 00 9d 1f 00 00 |................| > 00000010 02 2e 00 00 00 00 00 00 aa 1f 00 00 02 2e 00 00 |................| > 00000020 00 00 00 00 b8 1f 00 00 02 2e 00 00 00 |.............| > 0000002d > kvt@joy:~$ curl -s https://a0.twilightparadox.com|hd > 00000000 3c 68 74 6d 6c 3e 3c 62 6f 64 79 3e 55 6e 64 65 |<html><body>Unde| > 00000010 72 20 63 6f 6e 73 74 72 75 63 74 69 6f 6e 3c 2f |r construction</| > 00000020 62 6f 64 79 3e 3c 2f 68 74 6d 6c 3e 0a |body></html>.| > 0000002d > kvt@joy:~$ > > I reverted kernel to 4.19.98 and everything worked fine with same > settings. Locally everything works fine (with latest kernel): > > kvt@rage:~$ curl -s 127.0.0.1 > <html><body>Under construction</body></html> > kvt@rage:~$ > > The worst thing is that if I do local http call and then do external > http call I'm getting kernel panic (please see file attached). This > kernel panic was captured on 5.4.10 but I see same behavior with > latest 5.5.6. > > If I shutdown nginx and run some other http server (e.g. python3 -m > http.server) everything works fine. > > Just in case please find my kernel config attached. > > Please let me know if something is wrong with my kernel config or if I > need to provide any additional information. > > Thanks, > Kirill.
