Bug 2079582
| Summary: | [libvirt] virtiofsd: Allow option --thread-pool-size=X | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 8 | Reporter: | Vivek Goyal <vgoyal> |
| Component: | libvirt | Assignee: | Ján Tomko <jtomko> |
| Status: | CLOSED ERRATA | QA Contact: | Lili Zhu <lizhu> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 8.4 | CC: | dgilbert, dzheng, jdenemar, jsuchane, jtomko, lmen, nilal, virt-maint, xuzhang |
| Target Milestone: | rc | Keywords: | Triaged |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | libvirt-8.0.0-9.module+el8.7.0+15830+85788ab7 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2022-11-08 09:19:55 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | 8.5.0 |
| Embargoed: | |||
|
Description
Vivek Goyal
2022-04-27 18:59:10 UTC
Upstream patches adding <thread_pool size='%i'/> element: https://listman.redhat.com/archives/libvir-list/2022-June/232406.html Pushed upstream as:
commit 0df2e7df80452f81edbfeb0ee355235b533346a9
Author: Ján Tomko <jtomko>
CommitDate: 2022-06-16 14:58:25 +0200
conf: virtiofs: add thread_pool element
Add an element to configure the thread pool size:
...
<binary>
<thread_pool size='16'/>
</binary>
...
https://bugzilla.redhat.com/show_bug.cgi?id=2072905
Signed-off-by: Ján Tomko <jtomko>
Reviewed-by: Michal Privoznik <mprivozn>
git describe: v8.4.0-256-g0df2e7df80
fedora ~/work/libvirt $ post HEAD^^ HEAD
commit 2753eba20ce76d3d8785b23a6e940574ca12fe3c
Author: Ján Tomko <jtomko>
CommitDate: 2022-06-16 14:58:25 +0200
qemu: virtiofs: format --thread-pool-size
https://bugzilla.redhat.com/show_bug.cgi?id=2079582
Signed-off-by: Ján Tomko <jtomko>
Reviewed-by: Michal Privoznik <mprivozn>
commit 0df2e7df80452f81edbfeb0ee355235b533346a9
Author: Ján Tomko <jtomko>
CommitDate: 2022-06-16 14:58:25 +0200
conf: virtiofs: add thread_pool element
Add an element to configure the thread pool size:
...
<binary>
<thread_pool size='16'/>
</binary>
...
https://bugzilla.redhat.com/show_bug.cgi?id=2072905
Signed-off-by: Ján Tomko <jtomko>
Reviewed-by: Michal Privoznik <mprivozn>
git describe: v8.4.0-257-g2753eba20c
(In reply to Ján Tomko from comment #4) > Pushed upstream as: > Thanks Jan Tomko for taking care of this. Verify this bug with:
libvirt-daemon-8.0.0-9.module+el8.7.0+15830+85788ab7.x86_64
qemu-kvm-6.2.0-16.module+el8.7.0+15743+c774064d.x86_64
1. prepare a guest with the following xml snippet
<filesystem type='mount' accessmode='passthrough'>
<driver type='virtiofs' queue='1024'/>
<binary path='/usr/libexec/virtiofsd' xattr='on'>
<thread_pool size='32'/>
</binary>
<source dir='/path1'/>
<target dir='mount_tag1'/>
<alias name='fs0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
</filesystem>
2. start the guest
# virsh start avocado-vt-vm1
Domain 'avocado-vt-vm1' started
3. check the virtiofsd process
# ps aux |grep virtiofs
root 235785 0.0 0.0 122808 4836 ? Sl 22:53 0:00 /usr/libexec/virtiofsd --fd=44 -o source=/path1,xattr --thread-pool-size=32
root 235830 0.0 0.0 1318848 1900 ? Sl 22:53 0:00 /usr/libexec/virtiofsd --fd=44 -o source=/path1,xattr --thread-pool-size=32
4. check the qemu cmdline
...
-chardev socket,id=chr-vu-fs0,path=/var/lib/libvirt/qemu/domain-14-avocado-vt-vm1/fs0-fs.sock -device vhost-user-fs-pci,id=fs0,chardev=chr-vu-fs0,queue-size=1024,tag=mount_tag1,bus=pcie.0,addr=0x9
...
5.login the guest then mount the virtiofs:
[guest os]# mkdir /root/mount1; mount -t virtiofs mount_tag1 /root/mount1
6. Generate a file on the mountpoint in the guest:
(guest os)# dd if=/dev/random of=testfile bs=1M count=1024
7. check the md5sum value
[guest os]# md5sum /mount1/testfile
24007156c378fb3a7ec0d937c03775b8 testfile
[host os]# md5sum testfile
24007156c378fb3a7ec0d937c03775b8 testfile
After added the option --thread-pool-size=X, functions work well. Mark the bug as verified.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Low: virt:rhel and virt-devel:rhel security, bug fix, and enhancement update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2022:7472 |