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| author | Shaohua Li <shaohua.li@intel.com> | 2010-10-20 11:07:02 +0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-10-20 14:33:58 -0700 |
| commit | c957ef2c59e952803766ddc22e89981ab534606f (patch) | |
| tree | 3add0b22291af02c8675206861327f8314638bb9 /include/asm-generic | |
| parent | f01f7c56a1425b9749a99af821e1de334fb64d7e (diff) | |
| download | op-kernel-dev-c957ef2c59e952803766ddc22e89981ab534606f.zip op-kernel-dev-c957ef2c59e952803766ddc22e89981ab534606f.tar.gz | |
percpu: Introduce a read-mostly percpu API
Add a new readmostly percpu section and API. This can be used to
avoid dirtying data lines which are generally not written to, which is
especially important for data which may be accessed by processors
other than the one for which the percpu area belongs to.
[ hpa: moved it *after* the page-aligned section, for obvious
reasons. ]
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
LKML-Reference: <1287544022.4571.7.camel@sli10-conroe.sh.intel.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 8a92a17..d7e7b21 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -677,7 +677,9 @@ - LOAD_OFFSET) { \ VMLINUX_SYMBOL(__per_cpu_start) = .; \ *(.data..percpu..first) \ + . = ALIGN(PAGE_SIZE); \ *(.data..percpu..page_aligned) \ + *(.data..percpu..readmostly) \ *(.data..percpu) \ *(.data..percpu..shared_aligned) \ VMLINUX_SYMBOL(__per_cpu_end) = .; \ @@ -703,6 +705,8 @@ VMLINUX_SYMBOL(__per_cpu_load) = .; \ VMLINUX_SYMBOL(__per_cpu_start) = .; \ *(.data..percpu..first) \ + . = ALIGN(PAGE_SIZE); \ + *(.data..percpu..readmostly) \ *(.data..percpu..page_aligned) \ *(.data..percpu) \ *(.data..percpu..shared_aligned) \ |
