On Wed, Aug 02, 2023 at 09:52:45AM +0100, Conor Dooley wrote:
On Wed, Aug 02, 2023 at 10:33:27AM +0200, Greg KH wrote:
On Wed, Aug 02, 2023 at 04:17:51PM +0800, Minda Chen wrote:
On 2023/8/2 15:48, Conor Dooley wrote:
On Wed, Aug 02, 2023 at 03:32:15PM +0800, Minda Chen wrote:
On 2023/8/2 14:54, Conor Dooley wrote:
Hey Minda,
On Wed, Aug 02, 2023 at 02:42:15PM +0800, Minda Chen wrote: > Actually it is a part of Conor's > commit aae538cd03bc ("riscv: fix detection of toolchain > Zihintpause support"). > It is looks like a merge issue.
Yup, spot on.
> Samuel's > commit 0b1d60d6dd9e ("riscv: Fix build with > CONFIG_CC_OPTIMIZE_FOR_SIZE=y") do not base on Conor's commit and > revert to __riscv_zihintpause. So this patch can fix it. > > Signed-off-by: Minda Chen minda.chen@starfivetech.com
Did you actually manage to trigger this, or was this by inspection? clang-15 + binutils 2.35 was, IIRC, how we spotted this because that's what the clang-built-linux CI uses to test the LTS kernels from before LLVM's IAS was supported for RISC-V. Seemingly all that needs to be satisfied there is that zihintpause doesn't appear in -march so this has gone unnoticed.
Fixes: 3c349eacc559 ("Merge patch "riscv: Fix build with CONFIG_CC_OPTIMIZE_FOR_SIZE=y"") Reviewed-by: Conor Dooley conor.dooley@microchip.com
Thanks, Conor.
Thanks, Conor. I found this just by inspection. I found a issue that vdso.so call cpu_relax cause application core dump in kernel 6.1.31. I need Samuel'patch to fix this. And I search the log of processor.h found this issue.
That doesn't look like it is fixed in later stable kernels (we are at 6.1.42-rcN right now I think). It sounds we should ask Greg to backport 0b1d60d6dd9e ("riscv: Fix build with CONFIG_CC_OPTIMIZE_FOR_SIZE=y") to 6.1. Does that make sense to you?
Yes. 6.1 is lts kernel. Starfive will use this kernel for a long time. Thanks.
What is preventing you from moving to a newer kernel version? All of your kernel changes are already properly merged into Linus's tree, right?
Regardless of their reasons, "vdso.so call cpu_relax cause application core dump" is something that we should fix in stable kernels, no?
Yes.