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authorChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:34:26 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-06-30 12:35:44 +0000
commit25f8033d556aa17afaea4a5196ea7a69fe248320 (patch)
tree0f056db167683be54ea1e5e72d29d6069af55e7d /results/classifier/deepseek-2-tmp/output/files/2179
parent8e6da29e4ee5fc14bc1cc816a24f21271f14090d (diff)
downloademulator-bug-study-25f8033d556aa17afaea4a5196ea7a69fe248320.tar.gz
emulator-bug-study-25f8033d556aa17afaea4a5196ea7a69fe248320.zip
add new temporary deepseek-r1:14b results
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diff --git a/results/classifier/deepseek-2-tmp/output/files/2179 b/results/classifier/deepseek-2-tmp/output/files/2179
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+
+qemu-storage-daemon: fuse export deadlock
+Steps to reproduce:
+1. Start QSD
+2. Issue a `block-stream` and a read from the fuse export at the same time 
+
+```
+Term 1:
+(QEMU) block-stream device=root job-id=job1
+{"return": {}}
+(QEMU) 
+{'timestamp': {'seconds': 1708386076, 'microseconds': 965781}, 'event': 'JOB_STATUS_CHANGE', 'data': {'status': 'created', 'id': 'job1'}}
+{'timestamp': {'seconds': 1708386076, 'microseconds': 965838}, 'event': 'JOB_STATUS_CHANGE', 'data': {'status': 'running', 'id': 'job1'}}
+(QEMU) 
+(QEMU) 
+(QEMU) 
+(QEMU) query-block-jobs
+
+<HANGS>
+
+
+Term 2:
+dd if=/tmp/fuse_exp of=/dev/null bs=1M skip=2000
+<HANGS>
+```
+
+```
+$ pidof qemu-storage-daemon 
+ 92313
+$ sudo cat /proc/92313/task/92313/stack 
+[<0>] do_sys_poll+0x4e1/0x5d0
+[<0>] __x64_sys_ppoll+0xe2/0x170
+[<0>] do_syscall_64+0x64/0xe0
+[<0>] entry_SYSCALL_64_after_hwframe+0x6e/0x76
+
+$ sudo cat /proc/92313/task/92314/stack 
+[<0>] futex_wait_queue+0x63/0x90
+[<0>] __futex_wait+0x14f/0x1c0
+[<0>] futex_wait+0x77/0x110
+[<0>] do_futex+0xcb/0x190
+[<0>] __x64_sys_futex+0x129/0x1e0
+[<0>] do_syscall_64+0x64/0xe0
+[<0>] entry_SYSCALL_64_after_hwframe+0x6e/0x76
+```
+Additional information:
+This might also be a general between `block-stream` and `copy-on-read` but I could only trigger the problem with FUSE and not NBD. E.g this command does not deadlock:
+```
+--export type=nbd,id=nbd-root,node-name=root_crw,name=root_crw,writable=off 
+
+nbdfuse /tmp/tmp.69dRvNXj1O/disk nbd://localhost:10809/root_crw
+dd if=/tmp/tmp.69dRvNXj1O/disk of=/dev/null bs=1M skip=2000
+```