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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:07 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 16:52:17 +0200 |
| commit | 9260319e7411ff8281700a532caa436f40120ec4 (patch) | |
| tree | 2f6bfe5f3458dd49d328d3a9eb508595450adec0 /gitlab/issues_text/target_missing/host_missing/accel_missing/997 | |
| parent | 225caa38269323af1bfc2daadff5ec8bd930747f (diff) | |
| download | qemu-analysis-9260319e7411ff8281700a532caa436f40120ec4.tar.gz qemu-analysis-9260319e7411ff8281700a532caa436f40120ec4.zip | |
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Diffstat (limited to 'gitlab/issues_text/target_missing/host_missing/accel_missing/997')
| -rw-r--r-- | gitlab/issues_text/target_missing/host_missing/accel_missing/997 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gitlab/issues_text/target_missing/host_missing/accel_missing/997 b/gitlab/issues_text/target_missing/host_missing/accel_missing/997 new file mode 100644 index 000000000..1c19b47b4 --- /dev/null +++ b/gitlab/issues_text/target_missing/host_missing/accel_missing/997 @@ -0,0 +1,17 @@ +Iothread is stuck at 100% CPU usage with virtio-scsi on QEMU 7.0.0 +Description of problem: +Starting with QEMU 7.0.0, the iothread associated attached to a virtio-scsi controller is stuck at 100% CPU usage. Bisected to: https://gitlab.com/qemu-project/qemu/-/commit/826cc32423db2a99d184dbf4f507c737d7e7a4ae + +- Works as expected without the iothread +- No issue with virtio-blk + iothread +- Same behavior regardless of io=threads/native/io_uring +- Same behavior with default vs increased queue count +- The issue is triggered when the guest OS initializes the virtio driver +Steps to reproduce: +1. Add virtio-scsi controller with iothread +2. Boot VM +3. Check per-thread CPU usage such as in htop +Additional information: +[fedora.log](/uploads/776fbf8e5b823d0ab326946684ef9022/fedora.log) + +[fedora.xml](/uploads/54879e5adfb227ddef79d382e86fc608/fedora.xml) |