lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

percpu: align percpu readmostly subsection to cacheline

Browse Source 
Currently percpu readmostly subsection may share cachelines with other
percpu subsections which may result in unnecessary cacheline bounce
and performance degradation.

This patch adds @cacheline parameter to PERCPU() and PERCPU_VADDR()
linker macros, makes each arch linker scripts specify its cacheline
size and use it to align percpu subsections.

This is based on Shaohua's x86 only patch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Shaohua Li <shaohua.li@intel.com>
This commit is contained in:
Tejun Heo
2011-01-25 14:26:50 +01:00
parent c723fdab8a
commit 19df0c2fef
19 changed files with 41 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/tile/kernel/vmlinux.lds.S
View File

@@ -63,7 +63,7 @@ SECTIONS
*(.init.page)
} :data =0
INIT_DATA_SECTION(16)
PERCPU(PAGE_SIZE)
PERCPU(L2_CACHE_BYTES, PAGE_SIZE)
. = ALIGN(PAGE_SIZE);
VMLINUX_SYMBOL(_einitdata) = .;