* Re: [PATCH v2 5/12] percpu: Add {raw,this}_cpu_try_cmpxchg()
[not found] <20230531132323.587480729@infradead.org>
@ 2023-06-09 16:10 ` Konrad Dybcio
2023-06-09 16:13 ` Nathan Chancellor
0 siblings, 1 reply; 3+ messages in thread
From: Konrad Dybcio @ 2023-06-09 16:10 UTC (permalink / raw)
To: Peter Zijlstra
Cc: corbet, will, peterz, boqun.feng, mark.rutland, catalin.marinas,
dennis, tj, cl, hca, gor, agordeev, borntraeger, svens, tglx,
mingo, bp, dave.hansen, x86, hpa, joro, suravee.suthikulpanit,
robin.murphy, dwmw2, baolu.lu, Arnd Bergmann, Herbert Xu, davem,
penberg, rientjes, iamjoonsoo.kim, Andrew Morton, vbabka,
roman.gushchin, 42.hyeyoo, linux-doc, linux-kernel, linux-mm,
linux-s390, iommu, linux-arch, linux-crypto, sfr, mpe,
James.Bottomley, deller, linux-parisc, Nathan Chancellor, llvm
On 31.05.2023 15:08, Peter Zijlstra wrote:
> Add the try_cmpxchg() form to the per-cpu ops.
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> ---
+CC Nathan, llvm list
Hi all, this patch seems to break booting on Qualcomm ARM64 platforms
when compiled with clang (GCC works fine) for some reason..:
next-20230605 - works
next-20230606 - doesn't
grev -m 1 dc4e51fd9846 on next-20230606 - works again
b4 shazam <this_msgid> -P 1-4 - still works
b4 shazam <this_msgid> -P 5 - breaks
Confirmed on at least Qualcomm QCM2290, SM8250.
Checking the serial console, it hits a BUG_ON:
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] kernel BUG at mm/vmalloc.c:1638!
[ 0.000000] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP
[ 0.000000] Modules linked in:
[ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted [snip]
[ 0.000000] Hardware name: Qualcomm Technologies, Inc. Robotics RB1 (DT)
[ 0.000000] pstate: 000000c5 (nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 0.000000] pc : alloc_vmap_area+0xafc/0xb08
[ 0.000000] lr : alloc_vmap_area+0x9e4/0xb08
[ 0.000000] sp : ffffa50137f53c20
[ 0.000000] x29: ffffa50137f53c60 x28: ffffa50137f30c18 x27: 0000000000000000
[ 0.000000] x26: 0000000000007fff x25: ffff800080000000 x24: 000000000000cfff
[ 0.000000] x23: ffffffffffff8000 x22: ffffa50137fef970 x21: fffffbfff0000000
[ 0.000000] x20: ffff022982003208 x19: ffff0229820031f8 x18: ffffa50137f64f70
[ 0.000000] x17: ffffa50137fef980 x16: ffffa501375e6d08 x15: 0000000000000001
[ 0.000000] x14: ffffa5013831e1a0 x13: ffffa50137f30c18 x12: 0000000000402dc2
[ 0.000000] x11: 0000000000000000 x10: ffff022982003018 x9 : ffffa5013831e188
[ 0.000000] x8 : ffffcb55ff003228 x7 : 0000000000000000 x6 : 0000000000000048
[ 0.000000] x5 : 0000000000000000 x4 : ffffa50137f53bd0 x3 : ffffa50136490000
[ 0.000000] x2 : 0000000000000001 x1 : ffffa5013831e190 x0 : ffff022982003208
[ 0.000000] Call trace:
[ 0.000000] alloc_vmap_area+0xafc/0xb08
[ 0.000000] __get_vm_area_node+0x108/0x1e8
[ 0.000000] __vmalloc_node_range+0x1fc/0x728
[ 0.000000] __vmalloc_node+0x5c/0x70
[ 0.000000] init_IRQ+0x90/0x11c
[ 0.000000] start_kernel+0x1ac/0x3bc
[ 0.000000] __primary_switched+0xc4/0xcc
[ 0.000000] Code: f000e300 91062000 943bd9ba 17ffff8f (d4210000)
[ 0.000000] ---[ end trace 0000000000000000 ]---
[ 0.000000] Kernel panic - not syncing: Attempted to kill the idle task!
Compiled with clang 15.0.7 from Arch repos, with
make ARCH=arm64 LLVM=1
Konrad
> include/asm-generic/percpu.h | 113 +++++++++++++++++++++++++++++++++++++++++--
> include/linux/percpu-defs.h | 19 +++++++
> 2 files changed, 128 insertions(+), 4 deletions(-)
>
> --- a/include/asm-generic/percpu.h
> +++ b/include/asm-generic/percpu.h
> @@ -89,16 +89,37 @@ do { \
> __ret; \
> })
>
> -#define raw_cpu_generic_cmpxchg(pcp, oval, nval) \
> +#define __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, _cmpxchg) \
> +({ \
> + typeof(pcp) __val, __old = *(ovalp); \
> + __val = _cmpxchg(pcp, __old, nval); \
> + if (__val != __old) \
> + *(ovalp) = __val; \
> + __val == __old; \
> +})
> +
> +#define raw_cpu_generic_try_cmpxchg(pcp, ovalp, nval) \
> ({ \
> typeof(pcp) *__p = raw_cpu_ptr(&(pcp)); \
> - typeof(pcp) __ret; \
> - __ret = *__p; \
> - if (__ret == (oval)) \
> + typeof(pcp) __val = *__p, __old = *(ovalp); \
> + bool __ret; \
> + if (__val == __old) { \
> *__p = nval; \
> + __ret = true; \
> + } else { \
> + *(ovalp) = __val; \
> + __ret = false; \
> + } \
> __ret; \
> })
>
> +#define raw_cpu_generic_cmpxchg(pcp, oval, nval) \
> +({ \
> + typeof(pcp) __old = (oval); \
> + raw_cpu_generic_try_cmpxchg(pcp, &__old, nval); \
> + __old; \
> +})
> +
> #define raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
> ({ \
> typeof(pcp1) *__p1 = raw_cpu_ptr(&(pcp1)); \
> @@ -170,6 +191,16 @@ do { \
> __ret; \
> })
>
> +#define this_cpu_generic_try_cmpxchg(pcp, ovalp, nval) \
> +({ \
> + bool __ret; \
> + unsigned long __flags; \
> + raw_local_irq_save(__flags); \
> + __ret = raw_cpu_generic_try_cmpxchg(pcp, ovalp, nval); \
> + raw_local_irq_restore(__flags); \
> + __ret; \
> +})
> +
> #define this_cpu_generic_cmpxchg(pcp, oval, nval) \
> ({ \
> typeof(pcp) __ret; \
> @@ -282,6 +313,43 @@ do { \
> #define raw_cpu_xchg_8(pcp, nval) raw_cpu_generic_xchg(pcp, nval)
> #endif
>
> +#ifndef raw_cpu_try_cmpxchg_1
> +#ifdef raw_cpu_cmpxchg_1
> +#define raw_cpu_try_cmpxchg_1(pcp, ovalp, nval) \
> + __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, raw_cpu_cmpxchg_1)
> +#else
> +#define raw_cpu_try_cmpxchg_1(pcp, ovalp, nval) \
> + raw_cpu_generic_try_cmpxchg(pcp, ovalp, nval)
> +#endif
> +#endif
> +#ifndef raw_cpu_try_cmpxchg_2
> +#ifdef raw_cpu_cmpxchg_2
> +#define raw_cpu_try_cmpxchg_2(pcp, ovalp, nval) \
> + __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, raw_cpu_cmpxchg_2)
> +#else
> +#define raw_cpu_try_cmpxchg_2(pcp, ovalp, nval) \
> + raw_cpu_generic_try_cmpxchg(pcp, ovalp, nval)
> +#endif
> +#endif
> +#ifndef raw_cpu_try_cmpxchg_4
> +#ifdef raw_cpu_cmpxchg_4
> +#define raw_cpu_try_cmpxchg_4(pcp, ovalp, nval) \
> + __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, raw_cpu_cmpxchg_4)
> +#else
> +#define raw_cpu_try_cmpxchg_4(pcp, ovalp, nval) \
> + raw_cpu_generic_try_cmpxchg(pcp, ovalp, nval)
> +#endif
> +#endif
> +#ifndef raw_cpu_try_cmpxchg_8
> +#ifdef raw_cpu_cmpxchg_8
> +#define raw_cpu_try_cmpxchg_8(pcp, ovalp, nval) \
> + __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, raw_cpu_cmpxchg_8)
> +#else
> +#define raw_cpu_try_cmpxchg_8(pcp, ovalp, nval) \
> + raw_cpu_generic_try_cmpxchg(pcp, ovalp, nval)
> +#endif
> +#endif
> +
> #ifndef raw_cpu_cmpxchg_1
> #define raw_cpu_cmpxchg_1(pcp, oval, nval) \
> raw_cpu_generic_cmpxchg(pcp, oval, nval)
> @@ -407,6 +475,43 @@ do { \
> #define this_cpu_xchg_8(pcp, nval) this_cpu_generic_xchg(pcp, nval)
> #endif
>
> +#ifndef this_cpu_try_cmpxchg_1
> +#ifdef this_cpu_cmpxchg_1
> +#define this_cpu_try_cmpxchg_1(pcp, ovalp, nval) \
> + __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, this_cpu_cmpxchg_1)
> +#else
> +#define this_cpu_try_cmpxchg_1(pcp, ovalp, nval) \
> + this_cpu_generic_try_cmpxchg(pcp, ovalp, nval)
> +#endif
> +#endif
> +#ifndef this_cpu_try_cmpxchg_2
> +#ifdef this_cpu_cmpxchg_2
> +#define this_cpu_try_cmpxchg_2(pcp, ovalp, nval) \
> + __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, this_cpu_cmpxchg_2)
> +#else
> +#define this_cpu_try_cmpxchg_2(pcp, ovalp, nval) \
> + this_cpu_generic_try_cmpxchg(pcp, ovalp, nval)
> +#endif
> +#endif
> +#ifndef this_cpu_try_cmpxchg_4
> +#ifdef this_cpu_cmpxchg_4
> +#define this_cpu_try_cmpxchg_4(pcp, ovalp, nval) \
> + __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, this_cpu_cmpxchg_4)
> +#else
> +#define this_cpu_try_cmpxchg_4(pcp, ovalp, nval) \
> + this_cpu_generic_try_cmpxchg(pcp, ovalp, nval)
> +#endif
> +#endif
> +#ifndef this_cpu_try_cmpxchg_8
> +#ifdef this_cpu_cmpxchg_8
> +#define this_cpu_try_cmpxchg_8(pcp, ovalp, nval) \
> + __cpu_fallback_try_cmpxchg(pcp, ovalp, nval, this_cpu_cmpxchg_8)
> +#else
> +#define this_cpu_try_cmpxchg_8(pcp, ovalp, nval) \
> + this_cpu_generic_try_cmpxchg(pcp, ovalp, nval)
> +#endif
> +#endif
> +
> #ifndef this_cpu_cmpxchg_1
> #define this_cpu_cmpxchg_1(pcp, oval, nval) \
> this_cpu_generic_cmpxchg(pcp, oval, nval)
> --- a/include/linux/percpu-defs.h
> +++ b/include/linux/percpu-defs.h
> @@ -343,6 +343,21 @@ static __always_inline void __this_cpu_p
> pscr2_ret__; \
> })
>
> +#define __pcpu_size_call_return2bool(stem, variable, ...) \
> +({ \
> + bool pscr2_ret__; \
> + __verify_pcpu_ptr(&(variable)); \
> + switch(sizeof(variable)) { \
> + case 1: pscr2_ret__ = stem##1(variable, __VA_ARGS__); break; \
> + case 2: pscr2_ret__ = stem##2(variable, __VA_ARGS__); break; \
> + case 4: pscr2_ret__ = stem##4(variable, __VA_ARGS__); break; \
> + case 8: pscr2_ret__ = stem##8(variable, __VA_ARGS__); break; \
> + default: \
> + __bad_size_call_parameter(); break; \
> + } \
> + pscr2_ret__; \
> +})
> +
> /*
> * Special handling for cmpxchg_double. cmpxchg_double is passed two
> * percpu variables. The first has to be aligned to a double word
> @@ -426,6 +441,8 @@ do { \
> #define raw_cpu_xchg(pcp, nval) __pcpu_size_call_return2(raw_cpu_xchg_, pcp, nval)
> #define raw_cpu_cmpxchg(pcp, oval, nval) \
> __pcpu_size_call_return2(raw_cpu_cmpxchg_, pcp, oval, nval)
> +#define raw_cpu_try_cmpxchg(pcp, ovalp, nval) \
> + __pcpu_size_call_return2bool(raw_cpu_try_cmpxchg_, pcp, ovalp, nval)
> #define raw_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
> __pcpu_double_call_return_bool(raw_cpu_cmpxchg_double_, pcp1, pcp2, oval1, oval2, nval1, nval2)
>
> @@ -513,6 +530,8 @@ do { \
> #define this_cpu_xchg(pcp, nval) __pcpu_size_call_return2(this_cpu_xchg_, pcp, nval)
> #define this_cpu_cmpxchg(pcp, oval, nval) \
> __pcpu_size_call_return2(this_cpu_cmpxchg_, pcp, oval, nval)
> +#define this_cpu_try_cmpxchg(pcp, ovalp, nval) \
> + __pcpu_size_call_return2bool(this_cpu_try_cmpxchg_, pcp, ovalp, nval)
> #define this_cpu_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \
> __pcpu_double_call_return_bool(this_cpu_cmpxchg_double_, pcp1, pcp2, oval1, oval2, nval1, nval2)
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2 5/12] percpu: Add {raw,this}_cpu_try_cmpxchg()
2023-06-09 16:10 ` [PATCH v2 5/12] percpu: Add {raw,this}_cpu_try_cmpxchg() Konrad Dybcio
@ 2023-06-09 16:13 ` Nathan Chancellor
2023-06-09 16:20 ` Konrad Dybcio
0 siblings, 1 reply; 3+ messages in thread
From: Nathan Chancellor @ 2023-06-09 16:13 UTC (permalink / raw)
To: Konrad Dybcio
Cc: Peter Zijlstra, corbet, will, boqun.feng, mark.rutland,
catalin.marinas, dennis, tj, cl, hca, gor, agordeev, borntraeger,
svens, tglx, mingo, bp, dave.hansen, x86, hpa, joro,
suravee.suthikulpanit, robin.murphy, dwmw2, baolu.lu,
Arnd Bergmann, Herbert Xu, davem, penberg, rientjes,
iamjoonsoo.kim, Andrew Morton, vbabka, roman.gushchin, 42.hyeyoo,
linux-doc, linux-kernel, linux-mm, linux-s390, iommu, linux-arch,
linux-crypto, sfr, mpe, James.Bottomley, deller, linux-parisc,
llvm
Hi Konrad,
On Fri, Jun 09, 2023 at 06:10:38PM +0200, Konrad Dybcio wrote:
>
>
> On 31.05.2023 15:08, Peter Zijlstra wrote:
> > Add the try_cmpxchg() form to the per-cpu ops.
> >
> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> > ---
> +CC Nathan, llvm list
>
> Hi all, this patch seems to break booting on Qualcomm ARM64 platforms
> when compiled with clang (GCC works fine) for some reason..:
>
> next-20230605 - works
> next-20230606 - doesn't
>
> grev -m 1 dc4e51fd9846 on next-20230606 - works again
> b4 shazam <this_msgid> -P 1-4 - still works
> b4 shazam <this_msgid> -P 5 - breaks
>
> Confirmed on at least Qualcomm QCM2290, SM8250.
>
> Checking the serial console, it hits a BUG_ON:
>
> [ 0.000000] ------------[ cut here ]------------
> [ 0.000000] kernel BUG at mm/vmalloc.c:1638!
> [ 0.000000] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP
> [ 0.000000] Modules linked in:
> [ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted [snip]
> [ 0.000000] Hardware name: Qualcomm Technologies, Inc. Robotics RB1 (DT)
> [ 0.000000] pstate: 000000c5 (nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> [ 0.000000] pc : alloc_vmap_area+0xafc/0xb08
> [ 0.000000] lr : alloc_vmap_area+0x9e4/0xb08
> [ 0.000000] sp : ffffa50137f53c20
> [ 0.000000] x29: ffffa50137f53c60 x28: ffffa50137f30c18 x27: 0000000000000000
> [ 0.000000] x26: 0000000000007fff x25: ffff800080000000 x24: 000000000000cfff
> [ 0.000000] x23: ffffffffffff8000 x22: ffffa50137fef970 x21: fffffbfff0000000
> [ 0.000000] x20: ffff022982003208 x19: ffff0229820031f8 x18: ffffa50137f64f70
> [ 0.000000] x17: ffffa50137fef980 x16: ffffa501375e6d08 x15: 0000000000000001
> [ 0.000000] x14: ffffa5013831e1a0 x13: ffffa50137f30c18 x12: 0000000000402dc2
> [ 0.000000] x11: 0000000000000000 x10: ffff022982003018 x9 : ffffa5013831e188
> [ 0.000000] x8 : ffffcb55ff003228 x7 : 0000000000000000 x6 : 0000000000000048
> [ 0.000000] x5 : 0000000000000000 x4 : ffffa50137f53bd0 x3 : ffffa50136490000
> [ 0.000000] x2 : 0000000000000001 x1 : ffffa5013831e190 x0 : ffff022982003208
> [ 0.000000] Call trace:
> [ 0.000000] alloc_vmap_area+0xafc/0xb08
> [ 0.000000] __get_vm_area_node+0x108/0x1e8
> [ 0.000000] __vmalloc_node_range+0x1fc/0x728
> [ 0.000000] __vmalloc_node+0x5c/0x70
> [ 0.000000] init_IRQ+0x90/0x11c
> [ 0.000000] start_kernel+0x1ac/0x3bc
> [ 0.000000] __primary_switched+0xc4/0xcc
> [ 0.000000] Code: f000e300 91062000 943bd9ba 17ffff8f (d4210000)
> [ 0.000000] ---[ end trace 0000000000000000 ]---
> [ 0.000000] Kernel panic - not syncing: Attempted to kill the idle task!
>
> Compiled with clang 15.0.7 from Arch repos, with
> make ARCH=arm64 LLVM=1
Thanks a lot for testing with LLVM, submitting this report, and doing a
bisect. I sent a patch to fix this a couple of days ago and Peter pushed
it to -tip today, so it should be in the next -next release:
https://git.kernel.org/tip/093d9b240a1fa261ff8aeb7c7cc484dedacfda53
Cheers,
Nathan
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH v2 5/12] percpu: Add {raw,this}_cpu_try_cmpxchg()
2023-06-09 16:13 ` Nathan Chancellor
@ 2023-06-09 16:20 ` Konrad Dybcio
0 siblings, 0 replies; 3+ messages in thread
From: Konrad Dybcio @ 2023-06-09 16:20 UTC (permalink / raw)
To: Nathan Chancellor
Cc: Peter Zijlstra, corbet, will, boqun.feng, mark.rutland,
catalin.marinas, dennis, tj, cl, hca, gor, agordeev, borntraeger,
svens, tglx, mingo, bp, dave.hansen, x86, hpa, joro,
suravee.suthikulpanit, robin.murphy, dwmw2, baolu.lu,
Arnd Bergmann, Herbert Xu, davem, penberg, rientjes,
iamjoonsoo.kim, Andrew Morton, vbabka, roman.gushchin, 42.hyeyoo,
linux-doc, linux-kernel, linux-mm, linux-s390, iommu, linux-arch,
linux-crypto, sfr, mpe, James.Bottomley, deller, linux-parisc,
llvm
On 9.06.2023 18:13, Nathan Chancellor wrote:
> Hi Konrad,
>
> On Fri, Jun 09, 2023 at 06:10:38PM +0200, Konrad Dybcio wrote:
>>
>>
>> On 31.05.2023 15:08, Peter Zijlstra wrote:
>>> Add the try_cmpxchg() form to the per-cpu ops.
>>>
>>> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
>>> ---
>> +CC Nathan, llvm list
>>
>> Hi all, this patch seems to break booting on Qualcomm ARM64 platforms
>> when compiled with clang (GCC works fine) for some reason..:
>>
>> next-20230605 - works
>> next-20230606 - doesn't
>>
>> grev -m 1 dc4e51fd9846 on next-20230606 - works again
>> b4 shazam <this_msgid> -P 1-4 - still works
>> b4 shazam <this_msgid> -P 5 - breaks
>>
>> Confirmed on at least Qualcomm QCM2290, SM8250.
>>
>> Checking the serial console, it hits a BUG_ON:
>>
>> [ 0.000000] ------------[ cut here ]------------
>> [ 0.000000] kernel BUG at mm/vmalloc.c:1638!
>> [ 0.000000] Internal error: Oops - BUG: 00000000f2000800 [#1] SMP
>> [ 0.000000] Modules linked in:
>> [ 0.000000] CPU: 0 PID: 0 Comm: swapper/0 Not tainted [snip]
>> [ 0.000000] Hardware name: Qualcomm Technologies, Inc. Robotics RB1 (DT)
>> [ 0.000000] pstate: 000000c5 (nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
>> [ 0.000000] pc : alloc_vmap_area+0xafc/0xb08
>> [ 0.000000] lr : alloc_vmap_area+0x9e4/0xb08
>> [ 0.000000] sp : ffffa50137f53c20
>> [ 0.000000] x29: ffffa50137f53c60 x28: ffffa50137f30c18 x27: 0000000000000000
>> [ 0.000000] x26: 0000000000007fff x25: ffff800080000000 x24: 000000000000cfff
>> [ 0.000000] x23: ffffffffffff8000 x22: ffffa50137fef970 x21: fffffbfff0000000
>> [ 0.000000] x20: ffff022982003208 x19: ffff0229820031f8 x18: ffffa50137f64f70
>> [ 0.000000] x17: ffffa50137fef980 x16: ffffa501375e6d08 x15: 0000000000000001
>> [ 0.000000] x14: ffffa5013831e1a0 x13: ffffa50137f30c18 x12: 0000000000402dc2
>> [ 0.000000] x11: 0000000000000000 x10: ffff022982003018 x9 : ffffa5013831e188
>> [ 0.000000] x8 : ffffcb55ff003228 x7 : 0000000000000000 x6 : 0000000000000048
>> [ 0.000000] x5 : 0000000000000000 x4 : ffffa50137f53bd0 x3 : ffffa50136490000
>> [ 0.000000] x2 : 0000000000000001 x1 : ffffa5013831e190 x0 : ffff022982003208
>> [ 0.000000] Call trace:
>> [ 0.000000] alloc_vmap_area+0xafc/0xb08
>> [ 0.000000] __get_vm_area_node+0x108/0x1e8
>> [ 0.000000] __vmalloc_node_range+0x1fc/0x728
>> [ 0.000000] __vmalloc_node+0x5c/0x70
>> [ 0.000000] init_IRQ+0x90/0x11c
>> [ 0.000000] start_kernel+0x1ac/0x3bc
>> [ 0.000000] __primary_switched+0xc4/0xcc
>> [ 0.000000] Code: f000e300 91062000 943bd9ba 17ffff8f (d4210000)
>> [ 0.000000] ---[ end trace 0000000000000000 ]---
>> [ 0.000000] Kernel panic - not syncing: Attempted to kill the idle task!
>>
>> Compiled with clang 15.0.7 from Arch repos, with
>> make ARCH=arm64 LLVM=1
>
> Thanks a lot for testing with LLVM, submitting this report, and doing a
> bisect.
No, thank *you* for making it even possible ;)
I sent a patch to fix this a couple of days ago and Peter pushed
> it to -tip today, so it should be in the next -next release:
>
> https://git.kernel.org/tip/093d9b240a1fa261ff8aeb7c7cc484dedacfda53
Amazing, I can boot the most recent next-20230609 with it again!
Konrad
>
> Cheers,
> Nathan
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-06-09 16:20 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <20230531132323.587480729@infradead.org>
2023-06-09 16:10 ` [PATCH v2 5/12] percpu: Add {raw,this}_cpu_try_cmpxchg() Konrad Dybcio
2023-06-09 16:13 ` Nathan Chancellor
2023-06-09 16:20 ` Konrad Dybcio
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).