[SCSI] Improve SCSI_LOGGING Kconfig entry
The Kconfig entry for SCSI_LOGGING refers the reader to drivers/scsi/scsi.c, but I didn't find any useful information there. There is certainly logging code in that file, but the logging types and logging levels are described in drivers/scsi/scsi_logging.h. Also, the procfs file referred to in the section is incorrect. It should be /proc/sys/dev/scsi/logging_level and not /proc/scsi/scsi. Signed-off-by: Robert Love <robert.w.love@intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
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@ -224,14 +224,15 @@ config SCSI_LOGGING
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can enable logging by saying Y to "/proc file system support" and
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"Sysctl support" below and executing the command
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echo "scsi log token [level]" > /proc/scsi/scsi
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echo <bitmask> > /proc/sys/dev/scsi/logging_level
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at boot time after the /proc file system has been mounted.
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where <bitmask> is a four byte value representing the logging type
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and logging level for each type of logging selected.
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There are a number of things that can be used for 'token' (you can
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find them in the source: <file:drivers/scsi/scsi.c>), and this
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allows you to select the types of information you want, and the
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level allows you to select the level of verbosity.
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There are a number of logging types and you can find them in the
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source at <file:drivers/scsi/scsi_logging.h>. The logging levels
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are also described in that file and they determine the verbosity of
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the logging for each logging type.
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If you say N here, it may be harder to track down some types of SCSI
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problems. If you say Y here your kernel will be somewhat larger, but
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