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