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Diffstat (limited to 'results/classifier/mode-deepseek-r1:32b/reasoning/user/456')
| -rw-r--r-- | results/classifier/mode-deepseek-r1:32b/reasoning/user/456 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/results/classifier/mode-deepseek-r1:32b/reasoning/user/456 b/results/classifier/mode-deepseek-r1:32b/reasoning/user/456 new file mode 100644 index 00000000..ee793b13 --- /dev/null +++ b/results/classifier/mode-deepseek-r1:32b/reasoning/user/456 @@ -0,0 +1,21 @@ +<think> +Okay, I'm trying to figure out whether this QEMU bug is related to user-mode or system-mode. Let me start by understanding the problem description. + +The user reports that when running a Valheim dedicated server using QEMU User on an x86_64 host, the process hangs after encountering a "futex function not implemented" error. The strace shows a futex call with FUTEX_PRIVATE_FLAG|FUTEX_UNLOCK_PI returning errno 38 (Function not implemented). Then, when they interrupt it with SIGINT, another futex call is interrupted. + +The steps to reproduce involve installing SteamCMD and the Valheim server, then running it under QEMU. The issue was first seen on a Raspberry Pi ARM64 host using Ubuntu's QEMU 5.2.0, but also reproduced on an x86 Fedora with a QEMU master build. + +Looking at the additional info, they mention cross libraries installed for AMD64. So, the problem seems to be when running an x86_64 binary under QEMU on different architectures. + +Now, considering how QEMU works: There's system-mode emulation where QEMU emulates a full OS, including kernel and hardware. In user-mode (qemu-x86_64), it translates syscalls from the guest to the host's syscalls. + +Futex is a Linux syscall used for synchronization between threads. If the futex implementation in QEMU's user-mode isn't handling certain flags or operations correctly, this could cause hangs because the function isn't implemented, leading to the process waiting indefinitely. + +Since the error occurs when running under QEMU User (x86_64), which translates syscalls without a full OS emulation, it's likely a problem in how QEMU handles futex calls. This suggests that the issue is within user-mode because it directly relates to syscall translation and handling, not lower-level hardware or system operations. + +In contrast, system-mode issues would involve things like device drivers, kernel interactions beyond syscall translation, or hardware emulation problems. Here, the problem is about a specific syscall not being properly implemented in QEMU's user-mode, so it falls under user-mode. +</think> + +The issue relates to how QEMU translates futex syscalls in user-mode, indicating a problem within the user-mode component. + +user \ No newline at end of file |