Note: This bug is displayed in read-only format because the product is no longer active in Red Hat Bugzilla.

RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.

Description of problem:
Virtiofs performance in windows guest have 1/3 compared with RHEL guest

Version-Release number of selected component (if applicable):
virtiofsd-1.5.0-1.el9.x86_64
kernel-5.14.0-284.2.1.el9_2.x86_64
qemu-kvm-7.2.0-11.el9_2.x86_64

Steps to Reproduce:
1.start virtiofsd on host
/usr/libexec/virtiofsd --socket-path=/var/tmp/avocado_poxmt7pc/avocado-vt-vm1-viofs-virtiofsd.sock -o source=/root/avocado/data/avocado-vt/virtio_fs_test/ -o cache=auto
2.boot up win2022/RHEL9.2 guest with virtiofs device.
3.start the virtiofs service  and get the shared disk
4. do fio test on the shared disk.
Ws2022:
"C:\Program Files (x86)\fio\fio\fio.exe" --name=stress --filename=Z:/test_file --ioengine=windowsaio --rw=write/read --direct=1 --bs=4K --size=1G --iodepth=256 --numjobs=128 --runtime=1800 --thread

RHEL9:
/usr/bin/fio --name=stress --filename=/mnt/myfs/test_file --ioengine=libaio --rw=write/read --direct=1 --bs=4K --size=1G --iodepth=256 --numjobs=128 --runtime=1800

Actual results:
It indeed has a performance decreation compared with linux guest, it's about 1/3 compared with RHEL9.2 guest.

Expected results:
Basically there is no big degration compared

Additional info:

Issue migration from Bugzilla to Jira is in process at this time. This will be the last message in Jira copied from the Bugzilla bug.