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@xxxxxxxxxxxxx> > > --- > +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
