2.6.33-longterm review patch. If anyone has any objections, please let us know.
------------------ Content-Length: 1475 Lines: 39 From: Borislav Petkov <[email protected]> commit 14fb57dccb6e1defe9f89a66f548fcb24c374c1d upstream. Trying to enable the local APIC timer on early K8 revisions uncovers a number of other issues with it, in conjunction with the C1E enter path on AMD. Fixing those causes much more churn and troubles than the benefit of using that timer brings so don't enable it on K8 at all, falling back to the original functionality the kernel had wrt to that. Reported-and-bisected-by: Nick Bowler <[email protected]> Cc: Boris Ostrovsky <[email protected]> Cc: Andreas Herrmann <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Cc: Hans Rosenfeld <[email protected]> Cc: Nick Bowler <[email protected]> Cc: Joerg-Volker-Peetz <[email protected]> Signed-off-by: Borislav Petkov <[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(-) --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -566,7 +566,7 @@ static void __cpuinit init_amd(struct cp #endif /* As a rule processors have APIC timer running in deep C states */ - if (c->x86 >= 0xf && !cpu_has_amd_erratum(amd_erratum_400)) + if (c->x86 > 0xf && !cpu_has_amd_erratum(amd_erratum_400)) set_cpu_cap(c, X86_FEATURE_ARAT); /* _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
