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List:       linux-ultrasparc
Subject:    Re: shm problems ?
From:       Wesley Hosking <wes () atlantek ! com ! au>
Date:       1998-09-28 7:01:48
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David S. Miller writes:
 > 
 > Upgrade to and install latest CVS kernel.
 > 
 > ftp://vger.rutgers.edu/pub/linux/README.CVS
 > 
It turned out I had to do both....
Jakub put a fix into the CVS archive for sg.o
(the generic scsi device) 

AND it required the stuff below (I changed the 1024's for SHMMAX to
4096)... 

(cdrecord requires a 4Mbyte chunk to ensure the SCSI flow is kept 
full to the CD - I just made it 4 * larger to make sure ;-)

It works fine ! (now).

wes


In response to Wesley Hosking writes:
 > I am VGER 2.1.121 with shm enabled, on an Ultra 30.
 > 
 > When I use xcdroast to burn a CD it gives me :
 > /usr/lib/xcdroast-0.96d/bin/cdrecord-1.6: Invalid argument. shmget failed
 > Cdrecord release 1.6 Copyright (C) 1995-1998 Jörg Schilling
 > 
 > (I also get the same in sparc32 mode :
 > 
 > /usr/lib/xcdroast-0.96d/bin/cdrecord-1.6: Invalid argument. shmget failed
 > Cdrecord release 1.6 Copyright (C) 1995-1998 Jörg Schilling
 > 
 > .....
 > 
 > ok - its probably the 
 > #define SHMMAX (1024 * 1024)
 > in include/asm-sparc64/shmparam.h   
 > 
 > 
 > cdrecord requires a 4M chunk...
 > will try it at 16Mb, and see if that is the problem.
 > 
 > If you don't hear from me there thats probably what the fix is ;-)
 > 
 > wes

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