Opt-in Linux 7.0 Kernel for Proxmox VE 9 available

Galaxis · Aug 8, 2026

weppa said:
Is there a way to « Escalate « this to Kernel maintainers ?

This would probably have to be reported to the Ubuntu kernel people? I have tried skimming over the changes between Ubuntu-7.0.0-28.28 and Ubuntu-7.0.0-28.28i2, but there was nothing obvious to me.
The problem was still present in 7.0.14-9 - just now rebooted my test machine into 7.0.14-11, but it usually takes a few hours or a day to run into a sample...

huganega · Aug 11, 2026

Hello Galaxis,
is the problem fixed with version 7.0.14-11?

Galaxis · Aug 11, 2026

huganega said:
is the problem fixed with version 7.0.14-11?

No, still the same.

Galaxis · 2026-08-24T20:16:07+0200

No change with 7.0.14-12-pve, but I assume no one (except Munin users) is feeding on /sys/block/ data as statistics source nowadays, since I haven't seen the problem mentioned elsewhere ‍*shrug*

janus57 · 2026-08-24T21:41:19+0200

Hi,

t.lamprecht said:
as that kernel got 9c69b6190efc block: invalidate cached plug timestamp after task switch which fixes a commit introduced in v6.9.

FYI there is a fixe for a race condition "Fixes: fad156c ("block: invalidate cached plug timestamp after task switch")" => https://github.com/torvalds/linux/commit/691b052139c94ee6640ac39e0b764dd3867897c0 & https://patchew.org/linux/20260715192950.2488921-1-mike@waychison.com/

Best regards,

santiagobiali · 2026-08-24T22:34:02+0200

Zabbix is also reporting high disk queue size since kernel 7 update.
I haven't noticed performance impact on those hosts, tho. Just cosmetics?

Item definition:

Name	Description	Type	Key and additional info

{#DEVNAME}: Disk average queue size (avgqu-sz)

The current average disk queue; the number of requests outstanding on the disk while the performance data is being collected.

Dependent item

vfs.dev.queue_size[{#DEVNAME}]
Preprocessing

JSON Path: $[10]
Change per second
Custom multiplier: 0.001

{#DEVNAME}: Get stats

The contents of get /sys/block/{#DEVNAME}/stat to get the disk statistics.

Zabbix agent

vfs.file.contents[/sys/block/{#DEVNAME}/stat]
Preprocessing

JavaScript: return JSON.stringify(value.trim().split(/ +/));

PB01: Ryzen 7 5700X + TUF GAMING X570 + 2x 1TB NVMe SSD ZFS MIRROR (Force MP600)

Bash:

journalctl -g 'Linux version' --no-pager -S '2 months ago'
Jul 10 07:01:31 pb01 kernel: Linux version 6.17.13-15-pve (build@proxmox) (gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44) #1 SMP PREEMPT_DYNAMIC PMX 6.17.13-15 (2026-07-07T09:34Z) ()
Jul 15 07:00:43 pb01 kernel: Linux version 6.17.13-16-pve (build@proxmox) (gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44) #1 SMP PREEMPT_DYNAMIC PMX 6.17.13-16 (2026-07-09T10:34Z) ()
Jul 21 07:00:51 pb01 kernel: Linux version 6.17.13-18-pve (build@proxmox) (gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44) #1 SMP PREEMPT_DYNAMIC PMX 6.17.13-18 (2026-07-15T10:30Z) ()
Jul 24 07:00:41 pb01 kernel: Linux version 7.0.14-6-pve (build@proxmox) (gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44) #1 SMP PREEMPT_DYNAMIC PMX 7.0.14-6 (2026-07-20T14:45Z) ()
Aug 11 07:30:50 pb01 kernel: Linux version 7.0.14-11-pve (build@proxmox) (gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44) #1 SMP PREEMPT_DYNAMIC PMX 7.0.14-11 (2026-08-06T23:36Z) ()

PS02: i5-13400 + TUF B760M-PLUS + 2x 1,92TB SATA SSD ZFS MIRROR (Enterprise MK001920GWCFB, VK001920GWTTC)

Bash:

journalctl -g 'Linux version' --no-pager -S '2 months ago'
Jul 09 13:15:54 ps02 kernel: Linux version 6.17.13-15-pve (build@proxmox) (gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44) #1 SMP PREEMPT_DYNAMIC PMX 6.17.13-15 (2026-07-07T09:34Z) ()
Jul 15 07:00:48 ps02 kernel: Linux version 6.17.13-16-pve (build@proxmox) (gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44) #1 SMP PREEMPT_DYNAMIC PMX 6.17.13-16 (2026-07-09T10:34Z) ()
Jul 21 07:00:47 ps02 kernel: Linux version 6.17.13-18-pve (build@proxmox) (gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44) #1 SMP PREEMPT_DYNAMIC PMX 6.17.13-18 (2026-07-15T10:30Z) ()
Jul 23 07:46:42 ps02 kernel: Linux version 7.0.14-6-pve (build@proxmox) (gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44) #1 SMP PREEMPT_DYNAMIC PMX 7.0.14-6 (2026-07-20T14:45Z) ()
Aug 10 13:10:55 ps02 kernel: Linux version 7.0.14-11-pve (build@proxmox) (gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44) #1 SMP PREEMPT_DYNAMIC PMX 7.0.14-11 (2026-08-06T23:36Z) ()

By sampling values, we can see high spikes:

Bash:

ps02: sda: Disk average queue size (avgqu-sz)
2026-08-24 16:44:26  0.01052
[...]
2026-08-24 15:55:26  0.00915
2026-08-24 15:54:26  0.01025
2026-08-24 15:53:26  20321.5902 <--
2026-08-24 15:52:26  0.0119
2026-08-24 15:51:26  0.0117
2026-08-24 15:50:26  0.009467
2026-08-24 15:49:26  0.00955
2026-08-24 15:48:26  0.009083
2026-08-24 15:47:26  0.009983
2026-08-24 15:46:26  0.01002
2026-08-24 15:45:26  20314.5085 <--
2026-08-24 15:44:26  0.01073
2026-08-24 15:43:26  0.0089
2026-08-24 15:42:26  0.009733
2026-08-24 15:41:26  0.01107
2026-08-24 15:40:26  0.009867
[...]
2026-08-24 15:14:26  0.008983
2026-08-24 15:13:26  0.009083
2026-08-24 15:12:26  0.01102
2026-08-24 15:11:26  0.01025
2026-08-24 15:10:26  20278.7035 <--
2026-08-24 15:09:26  0.008883
2026-08-24 15:08:26  0.01043
[...]
2026-08-24 14:34:26  0.008383
2026-08-24 14:33:26  0.008883
2026-08-24 14:32:26  20241.3041 <--
2026-08-24 14:31:26  0.01068
2026-08-24 14:30:26  0.009917
2026-08-24 14:29:26  40476.3976 <--
2026-08-24 14:28:26  0.01168
2026-08-24 14:27:26  0.00905
2026-08-24 14:26:26  0.01522

Opt-in Linux 7.0 Kernel for Proxmox VE 9 available

Galaxis

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huganega

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Galaxis

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Galaxis

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janus57

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santiagobiali

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