-128 errors after compiling kernel with clang tot (was: two issues after upgrading to a more up-to-date HEAD)

[Alexander Best]

On Sat Jun 25 11, Alexander Best wrote:
> On Fri Jun 17 11, Alexander Best wrote:
> > On Thu Jun 16 11, Alexander Best wrote:
> > > hi there,
> > 
> > i reverted my kernel back to r222890. everything works fine now and both issues
> > i mentioned below dissapeared.
> 
> the previous issues (xpt_action_default and DIOCSKERNELDUMP) have been fixed.
> however this one, where a lot of apps fail with errno -128 when accessing the
> disk, still exists. this really needs to be fixed before 9.0!
> 
> ...again...reverting to r222890 solves this completely. so it's not a problem
> with the disk or anything.
> 
> ..i'm guessing this is ahci related, but i'm not sure.

i was able to solve the issue. it seems clang tot was responsible for the
problem. i reverted back to compiling the kernel with gcc and the issue
dissapeared. i haven't tried with the clang revision that ships with world. i
think this problem only occurs with a more recent version of clang though.

cheers.
alex

ps: i've added freebsd-toolchain to CC. maybe some of the freebsd clang people
could confirm the issues with clang tot i was seeing.

> 
> cheers.
> alex
> 
> > 
> > i also discovered another issue with the more recent kernel:
> > 
> > i was getting errno -128 with a lot of apps. but only the first time i ran
> > them. e.g. with git:
> > 
> > 1) -128
> > 2) OK
> > 3) -128
> > 4) OK
> > 5) ...
> > 
> > the same with stuff like ./configure or ee(1). first time failures while
> > running or saving; second time it works.
> > 
> > this as well was fixed by reverting back to r222890.
> > 
> > cheers.
> > alex
> > 
> > > 
> > > i'm running HEAD on amd64. yesterday i updated my kernel to r223109. i'm now
> > > seeing two issues, which weren't there beforehand:
> > > 
> > > 1)
> > > ada0 at ahcich0 bus 0 scbus0 target 0 lun 0
> > > ada0: <SAMSUNG SP2504C VT100-50> ATA-7 SATA 2.x device
> > > ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
> > > ada0: Command Queueing enabled
> > > ada0: 238474MB (488395055 512 byte sectors: 16H 63S/T 16383C)
> > > ada1 at ahcich1 bus 0 scbus1 target 0 lun 0
> > > ada1: <SAMSUNG HD103SJ 1AJ10001> ATA-8 SATA 2.x device
> > > ada1: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
> > > ada1: Command Queueing enabled
> > > ada1: 953869MB (1953525168 512 byte sectors: 16H 63S/T 16383C)
> > > xpt_action_default: CCB type 0xe not supported
> > > xpt_action_default: CCB type 0xe not supported
> > > xpt_action_default: CCB type 0xe not supported
> > > cd0 at ahcich2 bus 0 scbus2 target 0 lun 0
> > > cd0: <HL-DT-ST DVDRAM GH24NS50 XP02> Removable CD-ROM SCSI-0 device 
> > > SMP: AP CPU #1 Launched!
> > > cd0: 150.000MB/s transfers (SATA 1.x, UDMA5, ATAPI 12bytes, PIO 8192bytes)
> > > cd0: cd present [2291664 x 2048 byte records]
> > > 
> > > ^^ i suspect the xpt_action_default messages have been introduced by the recent
> > > CAM changes. they appear to be harmless though.
> > > 
> > > 2)
> > > dumpon: ioctl(DIOCSKERNELDUMP): Device not configured
> > > /etc/rc: WARNING: unable to specify /dev/label/swapfs as a dump device
> > > 
> > > /dev/label/swapfs is a perfect swap partition and worked without any problems
> > > beforehand. specifying the device node instead of the label makes no
> > > difference:
> > > 
> > > taku% dumpon /dev/ada1p1
> > > dumpon: ioctl(DIOCSKERNELDUMP): Device not configured
> > > otaku% gpart show
> > > =>       34  488394988  ada0  GPT  (232G)
> > >          34        128     1  freebsd-boot  (64k)
> > >         162   16777216        - free -  (8.0G)
> > >    16777378  471617644     3  freebsd-ufs  (224G)
> > > 
> > > =>        34  1953525101  ada1  GPT  (931G)
> > >           34    20971520     1  freebsd-swap  (10G)
> > >     20971554     4194304     2  freebsd-ufs  (2.0G)
> > >     25165858  1928359277     3  freebsd-ufs  (919G)
> > > 
> > > otaku% glabel status
> > >                                       Name  Status  Components
> > >                                 label/boot     N/A  ada0p1
> > > gptid/e52df583-e446-11de-bb92-000fb58207c8     N/A  ada0p1
> > >                                 ufs/rootfs     N/A  ada0p3
> > >                               label/swapfs     N/A  ada1p1
> > >                                  ufs/varfs     N/A  ada1p2
> > >                                  ufs/usrfs     N/A  ada1p3
> > >      iso9660/Futurama Season 6 Ep 1-8 720p     N/A  cd0
> > > 
> > > cheers.
> > > alex
> > > 
> > > -- 
> > > a13x
> > 
> > -- 
> > a13x