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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 19:39:53 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 19:39:53 +0200
commitdee4dcba78baf712cab403d47d9db319ab7f95d6 (patch)
tree418478faf06786701a56268672f73d6b0b4eb239 /results/classifier/118/none/1272
parent4d9e26c0333abd39bdbd039dcdb30ed429c475ba (diff)
downloademulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.tar.gz
emulator-bug-study-dee4dcba78baf712cab403d47d9db319ab7f95d6.zip
restructure results
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@@ -1,80 +0,0 @@
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-hypervisor: 0.403
-VMM: 0.391
-register: 0.391
-ppc: 0.387
-device: 0.379
-TCG: 0.379
-performance: 0.371
-boot: 0.368
-x86: 0.365
-peripherals: 0.354
-vnc: 0.340
-files: 0.335
-architecture: 0.334
-user-level: 0.326
-graphic: 0.320
-permissions: 0.314
-arm: 0.309
-debug: 0.306
-mistranslation: 0.294
-socket: 0.266
-PID: 0.264
-network: 0.260
-i386: 0.260
-semantic: 0.253
-assembly: 0.250
-risc-v: 0.249
-kernel: 0.231
-
-qemu 7.1: assertion faillure with virtio-scsi in `blk_set_enable_write_cache`
-Description of problem:
-During the guest boot qemu crashes with the following error:
-
-> qemu-system-x86_64: ../src/block/block-backend.c:1949: blk_set_enable_write_cache: Assertion `qemu_in_main_thread()' failed.
-Steps to reproduce:
-1. Start a windows guest
-Additional information:
-Stacktrace:
-
-```
-#0 0x00007fd6c3515ce1 in raise () from /lib/x86_64-linux-gnu/libc.so.6
-#1 0x00007fd6c34ff537 in abort () from /lib/x86_64-linux-gnu/libc.so.6
-#2 0x00007fd6c34ff40f in ?? () from /lib/x86_64-linux-gnu/libc.so.6
-#3 0x00007fd6c350e662 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6
-#4 0x000056149e2cea03 in blk_set_enable_write_cache (wce=true, blk=0x5614a01c27f0) at ../src/block/block-backend.c:1949
-#5 0x000056149e2d0a67 in blk_set_enable_write_cache (blk=0x5614a01c27f0, wce=<optimized out>) at ../src/block/block-backend.c:1951
-#6 0x000056149dfe9c59 in scsi_disk_apply_mode_select (p=0x7fd6b400c00e "\004", page=<optimized out>, s=<optimized out>) at ../src/hw/scsi/scsi-disk.c:1520
-#7 mode_select_pages (change=true, len=18, p=0x7fd6b400c00e "\004", r=0x7fd6b4001ff0) at ../src/hw/scsi/scsi-disk.c:1570
-#8 scsi_disk_emulate_mode_select (inbuf=<optimized out>, r=0x7fd6b4001ff0) at ../src/hw/scsi/scsi-disk.c:1640
-#9 scsi_disk_emulate_write_data (req=0x7fd6b4001ff0) at ../src/hw/scsi/scsi-disk.c:1934
-#10 0x000056149e18ff16 in virtio_scsi_handle_cmd_req_submit (req=<optimized out>, req=<optimized out>, s=0x5614a12f16b0) at ../src/hw/scsi/virtio-scsi.c:719
-#11 virtio_scsi_handle_cmd_vq (vq=0x7fd6bab92140, s=0x5614a12f16b0) at ../src/hw/scsi/virtio-scsi.c:761
-#12 virtio_scsi_handle_cmd (vq=<optimized out>, vdev=<optimized out>) at ../src/hw/scsi/virtio-scsi.c:775
-#13 virtio_scsi_handle_cmd (vdev=0x5614a12f16b0, vq=0x7fd6bab92140) at ../src/hw/scsi/virtio-scsi.c:765
-#14 0x000056149e1a8aa6 in virtio_queue_notify_vq (vq=0x7fd6bab92140) at ../src/hw/virtio/virtio.c:2365
-#15 0x000056149e3ccea5 in aio_dispatch_handler (ctx=ctx@entry=0x5614a01babe0, node=<optimized out>) at ../src/util/aio-posix.c:369
-#16 0x000056149e3cd868 in aio_dispatch_ready_handlers (ready_list=0x7fd6c09b2680, ctx=0x5614a01babe0) at ../src/util/aio-posix.c:399
-#17 aio_poll (ctx=0x5614a01babe0, blocking=blocking@entry=true) at ../src/util/aio-posix.c:713
-#18 0x000056149e2a7796 in iothread_run (opaque=opaque@entry=0x56149ffde500) at ../src/iothread.c:67
-#19 0x000056149e3d0859 in qemu_thread_start (args=0x7fd6c09b26f0) at ../src/util/qemu-thread-posix.c:504
-#20 0x00007fd6c36b9ea7 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
-#21 0x00007fd6c35d9aef in clone () from /lib/x86_64-linux-gnu/libc.so.6
-```
-
-The crash was bisected to:
-
-```
-commit b1c073490553f80594b903ceedfc7c1aef6b1b19
-Author: Hanna Reitz <hreitz@redhat.com>
-Date: Tue Mar 29 11:35:45 2022 +0200
-
- main-loop: Disable GLOBAL_STATE_CODE() assertions
-```
-
-I have not been able to reproduce the bug with a linux guest nor with a fresh windows installation.
-
-The crashes appears with either `writethrough` and `directsync` cache modes but not with `writeback` `none` and `unsafe`.
-
-Note: if needed I can extract (privately) provide a disk image demonstrating the behavior