Messages in this thread | | | Date | Tue, 25 Jan 2011 14:32:13 +0100 | From | Tejun Heo <> | Subject | Re: [PATCH RESEND percpu#for-next] percpu: align percpu readmostly subsection to cacheline |
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On Mon, Dec 27, 2010 at 02:37:19PM +0100, Tejun Heo wrote: > 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> > --- > Shaohua, can you please verify this achieves the same result? If no > one objects, I'll route it through the percpu tree.
Applied to percpu#for-2.6.39.
Thanks.
-- tejun
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