On 24/10/24 16:18, Ryan Roberts wrote:
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On 23/10/2024 22:00, Thomas Tai wrote:
On 10/17/2024 8:32 AM, Ryan Roberts wrote:
On 17/10/2024 13:27, Petr Tesarik wrote:
On Mon, 14 Oct 2024 11:55:11 +0100
Ryan Roberts <ryan.roberts@xxxxxxx> wrote:
[...]
The series is arranged as follows:
- patch 1: Add macros required for converting non-arch code to support
boot-time page size selection
- patches 2-36: Remove PAGE_SIZE compile-time constant assumption from all
non-arch code
I have just tried to recompile the openSUSE kernel with these patches
applied, and I'm running into this:
CC arch/arm64/hyperv/hv_core.o
In file included from ../arch/arm64/hyperv/hv_core.c:14:0:
../include/linux/hyperv.h:158:5: error: variably modified ‘reserved2’ at file
scope
u8 reserved2[PAGE_SIZE - 68];
^~~~~~~~~
It looks like one more place which needs a patch, right?
As mentioned in the cover letter, so far I've only converted enough to get the
defconfig *image* building (i.e. no modules). If you are compiling a different
config or compiling the modules for defconfig, you will likely run into these
types of issues.
It would be nice if you could provide the defconfig you are using; I also ran
into build issues when using the arch/arm64/configs/defconfig.
git clean -xdfq
make defconfig
# Set CONFIG_ARM64_BOOT_TIME_PAGE_SIZE
./scripts/config --disable CONFIG_ARM64_4K_PAGES
./scripts/config --disable CONFIG_ARM64_16K_PAGES
./scripts/config --disable CONFIG_ARM64_64K_PAGES
./scripts/config --disable CONFIG_ARM64_BOOT_TIME_PAGE_SIZE
./scripts/config --enable CONFIG_ARM64_BOOT_TIME_PAGE_SIZE
# Set ARM64_VA_BITS_48
./scripts/config --disable ARM64_VA_BITS_36
./scripts/config --disable ARM64_VA_BITS_39
./scripts/config --disable ARM64_VA_BITS_42
./scripts/config --disable ARM64_VA_BITS_47
./scripts/config --disable ARM64_VA_BITS_48
./scripts/config --disable ARM64_VA_BITS_52
./scripts/config --enable ARM64_VA_BITS_48
# Optional: filesystems known to compile with boot-time page size
./scripts/config --enable CONFIG_SQUASHFS_LZ4
./scripts/config --enable CONFIG_SQUASHFS_LZO
./scripts/config --enable CONFIG_SQUASHFS_XZ
./scripts/config --enable CONFIG_SQUASHFS_ZSTD
./scripts/config --enable CONFIG_XFS_FS
# Optional: trace stuff known to compile with boot-time page size
./scripts/config --enable CONFIG_FTRACE
./scripts/config --enable CONFIG_FUNCTION_TRACER
./scripts/config --enable CONFIG_KPROBES
./scripts/config --enable CONFIG_HIST_TRIGGERS
./scripts/config --enable CONFIG_FTRACE_SYSCALLS
# Optional: misc mm stuff known to compile with boot-time page size
./scripts/config --enable CONFIG_PTDUMP_DEBUGFS
./scripts/config --enable CONFIG_READ_ONLY_THP_FOR_FS
./scripts/config --enable CONFIG_USERFAULTFD
# Optional: mm debug stuff known compile with boot-time page size
./scripts/config --enable CONFIG_DEBUG_VM
./scripts/config --enable CONFIG_DEBUG_VM_MAPLE_TREE
./scripts/config --enable CONFIG_DEBUG_VM_RB
./scripts/config --enable CONFIG_DEBUG_VM_PGFLAGS
./scripts/config --enable CONFIG_DEBUG_VM_PGTABLE
./scripts/config --enable CONFIG_PAGE_TABLE_CHECK
./scripts/config --enable CONFIG_PAGE_TABLE_CHECK_ENFORCED
make olddefconfig
make -s -j`nproc` Image
So I'm explicitly only building and booting the kernel image, not the modules.
The kernel image contains all the drivers needed to get a VM up and running
under QEMU/KVM.
Thanks,
Ryan
Thank you for this patch set.
I was able to boot with minimal configs on Tegra234 board. Will enable
more configs and discuss.
Thank you,
Sumit Gupta
Thank you,
Thomas
That said, I do have some patches to fix Hyper-V, which Michael Kelley was kind
enough to send me.
I understand that Suse might be able to help with wider performance testing - if
that's the reason you are trying to compile, you could send me your config and
I'll start working on fixing up other drivers?
Thanks,
Ryan
Petr T
