Date: Tue, 24 Jun 1997 12:07:01 -0600 From: Steve Passe <smp@csn.net> To: Peter Wemm <peter@spinner.dialix.com.au> Cc: Bob Willcox <bob@luke.pmr.com>, lars@fredriks-1.pr.mcs.net, dyson@FreeBSD.ORG, freebsd-smp@FreeBSD.ORG Subject: Re: Recent (last two days) smp kernel is hanging for me Message-ID: <199706241807.MAA11971@Ilsa.StevesCafe.com> In-Reply-To: Your message of "Tue, 24 Jun 1997 20:53:00 %2B0800." <199706241253.UAA10065@spinner.dialix.com.au>
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Hi,
> Bob Willcox wrote:
> > On Tue, Jun 24, 1997 at 01:32:10AM -0600, Steve Passe wrote:
> > >
> > > I found something that would explain the new code working on the intels,
> > > but failing on both the ASUS and the P6DNF.
> > > ...
> > Well, that seemed to do the trick on my system!! :-)
>
> Well, pass me the pointy hat! *-<8-)
>
> Cheers,
> -Peter
sorry, Peter, but if thats the only thing you missed in that massive set of
changes you don't get to wear the hat!
John Dyson also reports that SMP is working again for him. Lars reports
that this fix gets him further along, but is still hanging in swapon.
---
So to summarize the failure on Lar's system:
I just booted the SMP kernel and broke into the debugger when
it got hung (after saying that all 2 cpus are online). Well it isn't
actually the kernel per se that is hung. It is in the smp_idleloop.
The problem is that one of the rc scripts is running swapon and it
is hung - on wait channel 0xf0b60a00 (i'll try to find out what this
is)
I have 2 scsi controllers in my system; a 2940 and a 2944.
-
config:
# ahc1 is the controller for sd0, swap devices on ahc0
controller ahc0
controller ahc1
controller scbus0 at ahc0
controller scbus1 at ahc1
disk sd0 at scbus1 target 0 unit 0
#disk sd1 at scbus0 target 1
tape st0 at scbus1 target 2
tape st1 at scbus1 target 5
device sd0 #Only need one of these, the code dynamically grows
device st0
device cd0
-
dmesg:
ahc0: <Adaptec 2944 SCSI host adapter> rev 0x03 int a irq 11 on pci0.19.0
using shared irq11.
ahc0: Reading SEEPROM...done.
low byte termination enabled, high byte termination enabled
ahc0: aic7870 Wide Channel, SCSI Id=7, 16/255 SCBs
ahc0: Resetting Channel A
ahc0: Downloading Sequencer Program...ahc0: 411 instructions downloaded
Done
ahc0: Probing channel A
Choosing drivers for scbus configured at 0
ahc0: waiting for scsi devices to settle
scbus0 at ahc0 bus 0
ahc0: target 0 synchronous at 8.0MHz, offset = 0xf
ahc0: target 0 Tagged Queuing Device
scbus0 target 0 lun 0: <SEAGATE KS23483 0901> type 0 fixed SCSI 2
sd1 at scbus0 target 0 lun 0
sd1: Direct-Access 2030MB (4159462 512 byte sectors)
sd1: with 2626 cyls, 19 heads, and an average 83 sectors/track
ahc0: target 1 synchronous at 4.4MHz, offset = 0xf
scbus0 target 1 lun 0: <IMPRIMIS KS23483 0959> type 0 fixed SCSI 1
sd2 at scbus0 target 1 lun 0
sd2: Direct-Access 955MB (1956864 512 byte sectors)
sd2: with 1931 cyls, 15 heads, and an average 67 sectors/track
ahc0: target 2 synchronous at 10.0MHz, offset = 0x8
ahc0: target 2 Tagged Queuing Device
scbus0 target 2 lun 0: <HP C2247 0BA4> type 0 fixed SCSI 2
sd3 at scbus0 target 2 lun 0
sd3: Direct-Access 1003MB (2054864 512 byte sectors)
sd3: with 2051 cyls, 13 heads, and an average 77 sectors/track
ahc0: target 3 using asynchronous transfers
ahc0:A:3: Warning - unknown message received from target (0x1). SEQ_FLAGS ==
0x6. Rejecting
scbus0 target 3 lun 0: <EXABYTE EXB-8500-85Qanx0 06X0> type 1 removable SCSI 2
st2 at scbus0 target 3 lun 0
st2: Sequential-Access density code 0x0, drive empty
ahc0: target 4 synchronous at 4.4MHz, offset = 0xf
scbus0 target 4 lun 0: <IMPRIMIS KS23483 0959> type 0 fixed SCSI 1
sd4 at scbus0 target 4 lun 0
sd4: Direct-Access 955MB (1956864 512 byte sectors)
sd4: with 1931 cyls, 15 heads, and an average 67 sectors/track
ahc0: target 5 synchronous at 4.4MHz, offset = 0xf
scbus0 target 5 lun 0: <IMPRIMIS KS23483 0959> type 0 fixed SCSI 1
sd5 at scbus0 target 5 lun 0
sd5: Direct-Access 955MB (1956864 512 byte sectors)
sd5: with 1931 cyls, 15 heads, and an average 67 sectors/track
ahc0: target 6 synchronous at 4.4MHz, offset = 0xf
scbus0 target 6 lun 0: <IMPRIMIS KS23483 0959> type 0 fixed SCSI 1
sd6 at scbus0 target 6 lun 0
sd6: Direct-Access 955MB (1956864 512 byte sectors)
sd6: with 1931 cyls, 15 heads, and an average 67 sectors/track
probe0(ahc0:9:0): scsi_cmd
probe0(ahc0:9:0): scsi_done
scbus0 target 9 lun 0: command: 0,0,0,0,0,0-[0 bytes]
probe0(ahc0:9:0): scsi_cmd
probe0(ahc0:9:0): scsi_done
scbus0 target 9 lun 0: command: 12,0,0,0,2c,0-[44 bytes]
------------------------------
000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
016: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
032: 00 00 00 00 00 00 00 00 00 00 00 00
------------------------------
found-> vendor=0x9004, dev=0x8178, revid=0x00
class=01-00-00, hdrtype=0x00, mfdev=0
intpin=a, irq=14
map[0]: type 4, range 32, base 0000e800, size 8
map[1]: type 1, range 32, base fe3e7000, size 12
ahc1: <Adaptec 2940 Ultra SCSI host adapter> rev 0x00 int a irq 14 on pci0.20.0
ahc1: Reading SEEPROM...done.
internal50 cable is present
internal68 cable not present
brdctl == 0xac
external cable is present
eprom is present
brdctl == 0xac
low byte termination disabled, high byte termination enabled
ahc1: aic7880 Wide Channel, SCSI Id=7, 16/255 SCBs
ahc1: Resetting Channel A
ahc1: Downloading Sequencer Program...ahc1: 418 instructions downloaded
Done
ahc1: Probing channel A
Choosing drivers for scbus configured at 1
ahc1: waiting for scsi devices to settle
scbus1 at ahc1 bus 0
ahc1: target 0 synchronous at 4.4MHz, offset = 0xf
scbus1 target 0 lun 0: <IMPRIMIS KS23483 0959> type 0 fixed SCSI 1
sd is configured at 0
sd0 at scbus1 target 0 lun 0
sd0: Direct-Access 955MB (1956864 512 byte sectors)
sd0: with 1931 cyls, 15 heads, and an average 67 sectors/track
ahc1:A:3: refuses synchronous negotiation. Using asynchronous transfers
scbus1 target 3 lun 0: <NRC MBR-7 111t> type 5 removable SCSI 2
cd0 at scbus1 target 3 lun 0
cd0: CD-ROM cd present [78823 x 2048 byte records]
scbus1 target 3 lun 1: <NRC MBR-7 111t> type 5 removable SCSI 2
cd1 at scbus1 target 3 lun 1
cd1: CD-ROM can't get the size
scbus1 target 3 lun 2: <NRC MBR-7 111t> type 5 removable SCSI 2
cd2 at scbus1 target 3 lun 2
cd2: CD-ROM cd present [196535 x 2048 byte records]
scbus1 target 3 lun 3: <NRC MBR-7 111t> type 5 removable SCSI 2
cd3 at scbus1 target 3 lun 3
cd3: CD-ROM cd present [227432 x 2048 byte records]
scbus1 target 3 lun 4: <NRC MBR-7 111t> type 5 removable SCSI 2
cd4 at scbus1 target 3 lun 4
cd4: CD-ROM cd present [167490 x 2048 byte records]
scbus1 target 3 lun 5: <NRC MBR-7 111t> type 5 removable SCSI 2
cd5 at scbus1 target 3 lun 5
cd5: CD-ROM cd present [87066 x 2048 byte records]
scbus1 target 3 lun 6: <NRC MBR-7 111t> type 5 removable SCSI 2
cd6 at scbus1 target 3 lun 6
cd6: CD-ROM cd present [303991 x 2048 byte records]
ahc1: target 5 synchronous at 5.0MHz, offset = 0x8
scbus1 target 5 lun 0: <HP HP35480A 1109> type 1 removable SCSI 2
st is configured at 1
st1 at scbus1 target 5 lun 0
st1: Sequential-Access density code 0x13, drive empty
probe0(ahc1:9:0): scsi_cmd
probe0(ahc1:9:0): scsi_done
scbus1 target 9 lun 0: command: 0,0,0,0,0,0-[0 bytes]
probe0(ahc1:9:0): scsi_cmd
probe0(ahc1:9:0): scsi_done
scbus1 target 9 lun 0: command: 12,0,0,0,2c,0-[44 bytes]
------------------------------
000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
016: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
032: 00 00 00 00 00 00 00 00 00 00 00 00
------------------------------
-------------------------------------------------------------------------------
I noticed long ago that a line in the config file like:
config kernel root on sd0 swaps on sd0
^^^^^^^^^^^^
would hang SMP.
So since these might be related, I am going to try adding that here and
hopefully attack the problem locally. If anyone has any clues/theories
plese speak up...
--
Steve Passe | powered by
smp@csn.net | Symmetric MultiProcessor FreeBSD
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