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authorLinus Torvalds <torvalds@linux-foundation.org>2011-10-28 05:03:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-10-28 05:03:12 -0700
commite34eb39c1c791fe79da6aae0d9057f0c74c2f0ed (patch)
treecfc27d987b2c888f189f35326702220b694596cc /Documentation
parent396e6e49c58bb23d1814d3c240c736c9f01523c5 (diff)
parent910b2c5122ab787179a790ca1dec616fc80f0173 (diff)
Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86, amd: Include linux/elf.h since we use stuff from asm/elf.h x86: cache_info: Update calculation of AMD L3 cache indices x86: cache_info: Kill the atomic allocation in amd_init_l3_cache() x86: cache_info: Kill the moronic shadow struct x86: cache_info: Remove bogus free of amd_l3_cache data x86, amd: Include elf.h explicitly, prepare the code for the module.h split x86-32, amd: Move va_align definition to unbreak 32-bit build x86, amd: Move BSP code to cpu_dev helper x86: Add a BSP cpu_dev helper x86, amd: Avoid cache aliasing penalties on AMD family 15h
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/kernel-parameters.txt13
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index a8ba119a4d5..6afd091bc1f 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -307,6 +307,19 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
behaviour to be specified. Bit 0 enables warnings,
bit 1 enables fixups, and bit 2 sends a segfault.
+ align_va_addr= [X86-64]
+ Align virtual addresses by clearing slice [14:12] when
+ allocating a VMA at process creation time. This option
+ gives you up to 3% performance improvement on AMD F15h
+ machines (where it is enabled by default) for a
+ CPU-intensive style benchmark, and it can vary highly in
+ a microbenchmark depending on workload and compiler.
+
+ 1: only for 32-bit processes
+ 2: only for 64-bit processes
+ on: enable for both 32- and 64-bit processes
+ off: disable for both 32- and 64-bit processes
+
amd_iommu= [HW,X86-84]
Pass parameters to the AMD IOMMU driver in the system.
Possible values are: