SCSI logging isn't documented very well, and what little there is
has a problem:
In Documentation/kernel-parameters.txt we have:
scsi_logging= [SCSI]
but it's really "scsi_logging_level", as seen here in drivers/scsi/scsi.c:
module_param(scsi_logging_level, int, S_IRUGO|S_IWUSR);
MODULE_PARM_DESC(scsi_logging_level, "a bit mask of logging levels");
Not exactly helpful. And the sysctl is called:
/proc/sys/dev/scsi/logging_level
Using scsi_logging.h, I came up with this:
0000 0000 0000 0000 0000 0000 0000 0000
0x7 111 Error
0x38 11 1 Timeout
0x1c0 1 11 Scan
0xe00 111 Midlevel queue
0x7000 111 Midlevel
completions
0x38000 11 1 Lowlevel queue
0x1c0000 1 11 Lowlevel
completions
0xe00000 111 Highlevel queue
0x7000000 111 Highlevel
completions
0x38000000 11 1 IOCTL
but I'm not sure if it's right.
And the actual implementation looks backwards, at least for highlevel
events. You need to set the level to 800000 to see driver loads and
that means wading through tons of extraneous crap. The logging
should show more verbosity at the higher numbers, not start
out with the most verbose output at the low numbers.
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