Commit 1cc5753f authored by Randy Dunlap's avatar Randy Dunlap Committed by Linus Torvalds
Browse files

[PATCH] Doc: update oops-tracing.txt (Tainted flags)



Update Documentation/oops-tracing.txt:

- add descriptions of 3 more "Tainted" flags;
- fix some typos;
Signed-off-by: default avatarRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 438e5c5e
......@@ -205,8 +205,8 @@ Phone: 701-234-7556
Tainted kernels:
Some oops reports contain the string 'Tainted: ' after the program
counter, this indicates that the kernel has been tainted by some
mechanism. The string is followed by a series of position sensitive
counter. This indicates that the kernel has been tainted by some
mechanism. The string is followed by a series of position-sensitive
characters, each representing a particular tainted value.
1: 'G' if all modules loaded have a GPL or compatible license, 'P' if
......@@ -214,16 +214,25 @@ characters, each representing a particular tainted value.
MODULE_LICENSE or with a MODULE_LICENSE that is not recognised by
insmod as GPL compatible are assumed to be proprietary.
2: 'F' if any module was force loaded by insmod -f, ' ' if all
2: 'F' if any module was force loaded by "insmod -f", ' ' if all
modules were loaded normally.
3: 'S' if the oops occurred on an SMP kernel running on hardware that
hasn't been certified as safe to run multiprocessor.
Currently this occurs only on various Athlons that are not
SMP capable.
hasn't been certified as safe to run multiprocessor.
Currently this occurs only on various Athlons that are not
SMP capable.
4: 'R' if a module was force unloaded by "rmmod -f", ' ' if all
modules were unloaded normally.
5: 'M' if any processor has reported a Machine Check Exception,
' ' if no Machine Check Exceptions have occurred.
6: 'B' if a page-release function has found a bad page reference or
some unexpected page flags.
The primary reason for the 'Tainted: ' string is to tell kernel
debuggers if this is a clean kernel or if anything unusual has
occurred. Tainting is permanent, even if an offending module is
unloading the tainted value remains to indicate that the kernel is not
occurred. Tainting is permanent: even if an offending module is
unloaded, the tainted value remains to indicate that the kernel is not
trustworthy.
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