devd(8) complains loudly when DVD player is empty, possibly due to r298134

[Trond Endrestøl]

On Wed, 27 Apr 2016 13:46-0400, Scott Long wrote:

> Thanks for the report.  I might be mistaken, but the default system 
> is not configured to direct devd messages to user.info, so I didn’t 
> see this during my development.  However, what you’re reporting is 
> definitely annoying, so Warner Losh and I are working on a solution.
> 
> Scott

I solved the problem by running devd with -q, i.e. devd_flags="-q" in 
/etc/rc.conf. This should probably be the default anyway.

All of my systems (stable/10) have custom logging where each facility 
has its own file. Also *.*;mark.* is sent to /dev/ttyvb and to the 
central log host. /dev/ttyvb was pretty busy on the log host.

Making devd less chatty does have its merits.
The next servers I buy will probably exclude a DVD player.

Happy hacking.

> > On Apr 27, 2016, at 1:23 PM, Trond Endrestøl <Trond.Endrestol at fagskolen.gjovik.no> wrote:
> > 
> > Hi,
> > 
> > The symptoms began after upgrading from stable/10 r298033 to stable/10 r298573.
> > 
> > Apr 27 18:40:00 <user.info> [HOSTNAME] devd: Processing event '!system=CAM subsystem=periph type=error device=cd0 serial="R8KL6GKC900AFG" cam_status="0xcc" scsi_status=2 scsi_sense="70 02 04 01" CDB="00 00 00 00 00 00 " '
> > 
> > These messages are just seconds apart:
> > 
> > Apr 27 18:40:01 <user.info> [HOSTNAME] devd: Processing event '!system=CAM subsystem=periph type=error device=pass1 serial="R8KL6GKC900AFG" cam_status="0xcc" scsi_status=2 scsi_sense="70 02 04 01" CDB="00 00 00 00 00 00 " '
> > Apr 27 18:40:03 <user.info> [HOSTNAME] devd: Processing event '!system=CAM subsystem=periph type=error device=pass1 serial="R8KL6GKC900AFG" cam_status="0xcc" scsi_status=2 scsi_sense="70 02 04 01" CDB="00 00 00 00 00 00 " '
> > Apr 27 18:40:05 <user.info> [HOSTNAME] devd: Processing event '!system=CAM subsystem=periph type=error device=pass1 serial="R8KL6GKC900AFG" cam_status="0xcc" scsi_status=2 scsi_sense="70 02 04 01" CDB="00 00 00 00 00 00 " '
> > 
> > When I put a CD or DVD in the DVD player, the messages stop. As soon 
> > as I eject the disc, they start appearing again.
> > 
> > Here's the relevant part from dmesg:
> > 
> > cd0 at ahcich1 bus 0 scbus1 target 0 lun 0
> > cd0: <TSSTcorp DVD+-RW SN-208BB D500> Removable CD-ROM SCSI device
> > cd0: Serial Number R8KL6GKC900AFG
> > cd0: 150.000MB/s transfers (SATA 1.x, UDMA5, ATAPI 12bytes, PIO 8192bytes)
> > cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
> > 
> > This is on a mid-2012 Dell Latitude E5530 with the stock DVD player.
> > 
> > Upgrading to stable/10 r298705 doesn't resolve this issue.
> > 
> > Does anyone else see this?
> > 
> > Maybe r298134 is to blame:
> > 
> >  stable/10/sys/cam/cam_periph.c
> > 
> >  MFC r298004:
> > 
> >  Add a devctl/devd notification conduit for CAM errors that happen at the
> >  periph level.
> > 
> >  Due to not merging the changes to ata_res_sbuf(), this version is a little
> >  messy.
> > 
> >  Sponsored by:	Netflix
> > 
> > http://svnweb.freebsd.org/base?view=revision&revision=298134

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