diff options
| -rw-r--r-- | Documentation/admin-guide/sysctl/kernel.rst | 2 | ||||
| -rw-r--r-- | Documentation/admin-guide/tainted-kernels.rst | 23 | ||||
| -rwxr-xr-x | tools/debugging/kernel-chktaint | 2 |
3 files changed, 20 insertions, 7 deletions
diff --git a/Documentation/admin-guide/sysctl/kernel.rst b/Documentation/admin-guide/sysctl/kernel.rst index d7a17859adbd..1d56a6b73a4e 100644 --- a/Documentation/admin-guide/sysctl/kernel.rst +++ b/Documentation/admin-guide/sysctl/kernel.rst @@ -1336,7 +1336,7 @@ ORed together. The letters are seen in "Tainted" line of Oops reports. ====== ===== ============================================================== 1 `(P)` proprietary module was loaded 2 `(F)` module was force loaded - 4 `(S)` SMP kernel oops on an officially SMP incapable processor + 4 `(S)` kernel running on an out of specification system 8 `(R)` module was force unloaded 16 `(M)` processor reported a Machine Check Exception (MCE) 32 `(B)` bad page referenced or some unexpected page flags diff --git a/Documentation/admin-guide/tainted-kernels.rst b/Documentation/admin-guide/tainted-kernels.rst index f718a2eaf1f6..ceeed7b0798d 100644 --- a/Documentation/admin-guide/tainted-kernels.rst +++ b/Documentation/admin-guide/tainted-kernels.rst @@ -84,7 +84,7 @@ Bit Log Number Reason that got the kernel tainted === === ====== ======================================================== 0 G/P 1 proprietary module was loaded 1 _/F 2 module was force loaded - 2 _/S 4 SMP kernel oops on an officially SMP incapable processor + 2 _/S 4 kernel running on an out of specification system 3 _/R 8 module was force unloaded 4 _/M 16 processor reported a Machine Check Exception (MCE) 5 _/B 32 bad page referenced or some unexpected page flags @@ -116,10 +116,23 @@ More detailed explanation for tainting 1) ``F`` if any module was force loaded by ``insmod -f``, ``' '`` if all modules were loaded normally. - 2) ``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. + 2) ``S`` if the kernel is running on a processor or system that is out of + specification: hardware has been put into an unsupported configuration, + therefore proper execution cannot be guaranteed. + Kernel will be tainted if, for example: + + - on x86: PAE is forced through forcepae on intel CPUs (such as Pentium M) + which do not report PAE but may have a functional implementation, an SMP + kernel is running on non officially capable SMP Athlon CPUs, MSRs are + being poked at from userspace. + - on arm: kernel running on certain CPUs (such as Keystone 2) without + having certain kernel features enabled. + - on arm64: there are mismatched hardware features between CPUs, the + bootloader has booted CPUs in different modes. + - certain drivers are being used on non supported architectures (such as + scsi/snic on something else than x86_64, scsi/ips on non + x86/x86_64/itanium, have broken firmware settings for the + irqchip/irq-gic on arm64 ...). 3) ``R`` if a module was force unloaded by ``rmmod -f``, ``' '`` if all modules were unloaded normally. diff --git a/tools/debugging/kernel-chktaint b/tools/debugging/kernel-chktaint index 2240cb56e6e5..607b2b280945 100755 --- a/tools/debugging/kernel-chktaint +++ b/tools/debugging/kernel-chktaint @@ -72,7 +72,7 @@ if [ `expr $T % 2` -eq 0 ]; then addout " " else addout "S" - echo " * SMP kernel oops on an officially SMP incapable processor (#2)" + echo " * kernel running on an out of specification system (#2)" fi T=`expr $T / 2` |