Comment 22 for bug 2048945

On Mon, Nov 13, 2023 at 03:30:57AM +0000, <email address hidden> wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=217914
>
> Christian Kujau (<email address hidden>) changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |<email address hidden>
>
> --- Comment #7 from Christian Kujau (<email address hidden>) ---
> Noticed the same here when upgrading from 6.1.0-13-amd64 to
> 6.5.0-0.deb12.1-amd64 (both Debian kernels) earlier this month:
>
> ============================================================================
> $ sar -f /var/log/sysstat/sa20231108
> CPU %user %nice %system %iowait %steal
> %idle
> [...]
> 18:30:03 all 1.03 0.00 0.45 0.04 0.00
> 98.47
> 18:40:01 all 1.07 0.00 0.52 0.05 0.00
> 98.36
> 18:50:01 all 1.07 0.00 0.53 0.04 0.00
> 98.37
> 19:00:01 all 1.35 0.00 0.69 0.08 0.00
> 97.88
> 19:10:04 all 1.09 0.00 0.52 0.07 0.00
> 98.31
> 19:20:02 all 1.14 0.00 0.51 0.05 0.00
> 98.30
> 19:30:04 all 1.62 0.00 0.65 0.08 0.00
> 97.65
> Average: all 1.06 0.00 0.50 0.06 0.00
> 98.38
>
> 19:32:27 LINUX RESTART (2 CPU)
>
> 19:40:03 CPU %user %nice %system %iowait %steal
> %idle
> 19:50:00 all 2.27 0.00 3.23 57.40 0.00
> 37.11
> 20:00:02 all 1.29 0.00 2.70 59.27 0.00
> 36.75
> 20:10:03 all 1.48 0.00 2.93 58.38 0.00
> 37.21
> 20:20:03 all 1.40 0.00 2.94 58.93 0.00
> 36.73
> 20:30:02 all 1.39 0.00 2.87 59.99 0.00
> 35.74
> 20:40:03 all 1.48 0.00 3.44 59.83 0.00
> 35.26
> 20:50:00 all 1.29 0.00 2.88 60.84 0.00
> 34.98
> 21:00:03 all 1.31 0.00 2.63 59.81 0.00
> 36.25
> 21:10:03 all 1.33 0.00 2.72 59.85 0.00
> 36.09
> 21:20:01 all 1.31 0.00 2.82 59.28 0.00
> 36.59
> 21:30:01 all 1.39 0.00 2.92 60.51 0.00
> 35.18
> 21:40:01 all 1.34 0.00 3.04 60.04 0.00
> 35.57
> 21:50:03 all 1.29 0.00 2.51 59.79 0.00
> 36.41
> 22:00:03 all 1.36 0.00 3.23 59.81 0.00
> 35.59
> 22:10:03 all 1.37 0.00 2.56 59.13 0.00
> 36.93
> 22:20:03 all 1.36 0.00 2.88 58.46 0.00
> 37.29
> 22:30:03 all 1.31 0.00 2.65 59.07 0.00
> 36.97
> 22:40:00 all 1.32 0.00 2.72 59.61 0.00
> 36.35
> 22:50:01 all 1.32 0.00 2.72 59.35 0.00
> 36.61
> 23:00:03 all 1.29 0.00 2.68 59.30 0.00
> 36.72
> 23:10:03 all 1.35 0.00 2.62 60.11 0.00
> 35.91
> 23:20:02 all 1.29 0.00 2.91 59.55 0.00
> 36.25
> 23:30:03 all 1.32 0.00 2.72 58.37 0.00
> 37.59
> 23:40:01 all 1.34 0.00 2.97 57.74 0.00
> 37.95
> 23:50:00 all 1.33 0.00 2.54 59.90 0.00
> 36.24
> Average: all 1.38 0.00 2.83 59.37 0.00
> 36.41
>
> $ last -n 3 reboot
> reboot system boot 6.5.0-0.deb12.1- Wed Nov 8 19:32 still running
> reboot system boot 6.1.0-13-amd64 Mon Oct 9 23:14 - 19:32 (29+21:17)
> reboot system boot 6.1.0-13-amd64 Mon Oct 9 22:39 - 23:14 (00:35)
> ============================================================================
>
> And top only shows a single [scsi_eh_2] thread using ~50% of CPU time,
> sometimes there's an events thread too.
>
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 336 root 20 0 0.0m 0.0m 0.0m D 50.0 0.0 53,37
> [scsi_eh_2]
> 3794126 root 20 0 0.0m 0.0m 0.0m I 25.7 0.0 0:06.27
> [kworker/0:0-events]
>
> This is a Debian/amd64 VM running on a VMware ESX host. There's a virtual
> CDROM
> drive, but nothing is attached here and I'm not using it, all:
>
>
> ============================================================================
> $ lsblk -d --scsi
> NAME HCTL TYPE VENDOR MODEL REV SERIAL
> TRAN
> sda 0:0:0:0 disk VMware Virtual disk 2.0
> sr0 2:0:0:0 rom NECVMWar VMware Virtual IDE CDROM Drive 1.00
> 10000000000000000001 ata
>
>
> $ dmesg -t | grep -i scsi
> Block layer SCSI generic (bsg) driver version 0.4 loaded (major 247)
> SCSI subsystem initialized
> VMware PVSCSI driver - version 1.0.7.0-k
> vmw_pvscsi: using 64bit dma
> vmw_pvscsi: max_id: 65
> vmw_pvscsi: setting ring_pages to 32
> vmw_pvscsi: enabling reqCallThreshold
> vmw_pvscsi: driver-based request coalescing enabled
> vmw_pvscsi: using MSI-X
> scsi host0: VMware PVSCSI storage adapter rev 2, req/cmp/msg rings: 32/32/1
> pages, cmd_per_lun=254
> vmw_pvscsi 0000:03:00.0: VMware PVSCSI rev 2 host #0
> scsi 0:0:0:0: Direct-Access VMware Virtual disk 2.0 PQ: 0 ANSI: 6
> sd 0:0:0:0: [sda] Attached SCSI disk
> sd 0:0:0:0: Attached scsi generic sg0 type 0
> scsi host1: ata_piix
> scsi host2: ata_piix
> scsi 2:0:0:0: CD-ROM NECVMWar VMware IDE CDR10 1.00 PQ: 0 ANSI: 5
> scsi 2:0:0:0: Attached scsi generic sg1 type 5
> sr 2:0:0:0: [sr0] scsi3-mmc drive: 1x/1x writer dvd-ram cd/rw xa/form2 cdda
> tray
> sr 2:0:0:0: Attached scsi CD-ROM sr0
> ============================================================================
>
> Will that "scsi: Do no try to probe for CDL on old drives" patch land in
> mainline or is this still under discussion?

It has been in mainline for a while:

2132df16f53b ("scsi: core: ata: Do no try to probe for CDL on old drives")

$ git tag --contains 2132df16f53b
v6.6
v6.6-rc4
v6.6-rc5
v6.6-rc6
v6.6-rc7
v6.6.1
v6.7-rc1

Kind regards,
Niklas