2.6.35-longterm review patch. If anyone has any objections, please let me know.
------------------ From: Boris Ostrovsky <[email protected]> commit e20a2d205c05cef6b5783df339a7d54adeb50962 upstream. Older AMD K8 processors (Revisions A-E) are affected by erratum 400 (APIC timer interrupts don't occur in C states greater than C1). This, for example, means that X86_FEATURE_ARAT flag should not be set for these parts. This addresses regression introduced by commit b87cf80af3ba4b4c008b4face3c68d604e1715c6 ("x86, AMD: Set ARAT feature on AMD processors") where the system may become unresponsive until external interrupt (such as keyboard input) occurs. This results, for example, in time not being reported correctly, lack of progress on the system and other lockups. Reported-by: Joerg-Volker Peetz <[email protected]> Tested-by: Joerg-Volker Peetz <[email protected]> Acked-by: Borislav Petkov <[email protected]> Signed-off-by: Boris Ostrovsky <[email protected]> Signed-off-by: Andi Kleen <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/x86/kernel/cpu/amd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-2.6.35.y/arch/x86/kernel/cpu/amd.c =================================================================== --- linux-2.6.35.y.orig/arch/x86/kernel/cpu/amd.c +++ linux-2.6.35.y/arch/x86/kernel/cpu/amd.c @@ -651,7 +651,7 @@ cpu_dev_register(amd_cpu_dev); */ const int amd_erratum_400[] = - AMD_OSVW_ERRATUM(1, AMD_MODEL_RANGE(0xf, 0x41, 0x2, 0xff, 0xf), + AMD_OSVW_ERRATUM(1, AMD_MODEL_RANGE(0x0f, 0x4, 0x2, 0xff, 0xf), AMD_MODEL_RANGE(0x10, 0x2, 0x1, 0xff, 0xf)); _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
