projects / people / teissler / ipfire-2.x.git / blame
| Commit | Line | Data |
|---|---|---|
| 00e5a55c BS |
1 | From: Nick Piggin <npiggin@suse.de> |
| 2 | Subject: Enable GB mapped linear KVA on x86 | |
| 3 | References: bnc#437674 | |
| 4 | Patch-upstream: should be in 2.6.28 or 29 | |
| 5 | ||
| 6 | GBPAGES should be turned on in SUSE x86-64 kernels. | |
| 7 | ||
| 8 | Signed-off-by: Nick Piggin <npiggin@suse.de> | |
| 9 | --- | |
| 10 | --- | |
| 11 | arch/x86/Kconfig | 9 +++++++++ | |
| 12 | arch/x86/Kconfig.debug | 12 ------------ | |
| 13 | 2 files changed, 9 insertions(+), 12 deletions(-) | |
| 14 | ||
| 15 | --- a/arch/x86/Kconfig | |
| 16 | +++ b/arch/x86/Kconfig | |
| 17 | @@ -960,6 +960,15 @@ config X86_PAE | |
| 18 | has the cost of more pagetable lookup overhead, and also | |
| 19 | consumes more pagetable space per process. | |
| 20 | ||
| 21 | +config DIRECT_GBPAGES | |
| 22 | + bool "Enable 1GB pages for kernel pagetables" if EMBEDDED | |
| 23 | + default y | |
| 24 | + depends on X86_64 | |
| 25 | + help | |
| 26 | + Allow the kernel linear mapping to use 1GB pages on CPUs that | |
| 27 | + support it. This can improve the kernel's performance a tiny bit by | |
| 28 | + reducing TLB pressure. If in doubt, say "Y". | |
| 29 | + | |
| 30 | # Common NUMA Features | |
| 31 | config NUMA | |
| 32 | bool "Numa Memory Allocation and Scheduler Support (EXPERIMENTAL)" | |
| 33 | --- a/arch/x86/Kconfig.debug | |
| 34 | +++ b/arch/x86/Kconfig.debug | |
| 35 | @@ -114,18 +114,6 @@ config DEBUG_RODATA | |
| 36 | data. This is recommended so that we can catch kernel bugs sooner. | |
| 37 | If in doubt, say "Y". | |
| 38 | ||
| 39 | -config DIRECT_GBPAGES | |
| 40 | - bool "Enable gbpages-mapped kernel pagetables" | |
| 41 | - depends on DEBUG_KERNEL && EXPERIMENTAL && X86_64 | |
| 42 | - help | |
| 43 | - Enable gigabyte pages support (if the CPU supports it). This can | |
| 44 | - improve the kernel's performance a tiny bit by reducing TLB | |
| 45 | - pressure. | |
| 46 | - | |
| 47 | - This is experimental code. | |
| 48 | - | |
| 49 | - If in doubt, say "N". | |
| 50 | - | |
| 51 | config DEBUG_RODATA_TEST | |
| 52 | bool "Testcase for the DEBUG_RODATA feature" | |
| 53 | depends on DEBUG_RODATA |