> With 2.1.x, I have lot of "Running low on SCSI DMA..." messages on
> console and
> in /var/log/kernel:
> Nov 19 22:26:08 woxlab kernel: Module inserted: Generic CD-ROM driver,
v
> 1.21 1996/11/08 03:24:49
> Nov 19 22:26:08 woxlab kernel: Detected scsi CD-ROM sr0 at scsi0,
channel
> 0, id 3, lun 0
> Nov 19 22:26:08 woxlab kernel: Disc change detected.
> Nov 19 22:26:08 woxlab kernel: sr: use "Sony group" multisession code
> Nov 19 22:26:08 woxlab kernel: VFS: Disk change detected on device
0b:00
> Nov 19 22:26:08 woxlab kernel: Max size:340424 Log zone size:2048
> Nov 19 22:26:08 woxlab kernel: First datazone:36 Root inode number
> 73728
> Nov 19 22:26:08 woxlab kernel: ISO9660 Extensions: RRIP_1991A
> Nov 19 22:27:16 woxlab kernel: Cannot read proc file system.
> Nov 19 22:27:46 woxlab last message repeated 6511 times
> Nov 19 22:28:47 woxlab last message repeated 16548 times
[...]
> Nov 19 22:48:07 woxlab last message repeated 20295 times
> Nov 19 22:49:07 woxlab last message repeated 19428 times
>
> when I read big file from SCSI CD-ROM. (I can read it and file is
> correct).
>
> I don't have this problem with my SCSI disk (root fs).
> After a look to drivers/scsi/sr.c and drivers/scsi/sd.c, I found what's
> wrong:
> In sd.c ALL tests with ISA_DMA_THRESHOLD call virt_to_phys() and
> virt_to_phys() is ONLY call with ISA_DMA_THRESHOLD tests.
> In sr.c virt_to_phys() is NEVER call. In ALL tests with
> ISA_DMA_THRESHOLD I add
> the virt_to_phys() call. It's work fine with 2.1.10 and may apply to
> 2.1.11.
Edouard.Parmelan@France.NCR.COM
> --- drivers/scsi/sr.c.orig Thu Nov 21 22:58:02 1996
> +++
> drivers/scsi/sr.c Thu Nov 21 23:04:17 1996
> @@ -35,6 +35,7 @@
> #include
> <linux/interrupt.h>
Fucking Micro$oft Exchange :(
The patch:
[[ SR~1.C-P : 3867 in SR~1.C-P ]]
edouard
The following binary file has been uuencoded to ensure successful
transmission. Use UUDECODE to extract.
begin 600 SR~1.C-P
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`
end