Messages in this thread | | | Date | Fri, 27 Mar 2015 06:11:44 -0500 (CDT) | From | Christoph Lameter <> | Subject | Re: [RFC] vmstat: Avoid waking up idle-cpu to service shepherd work |
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On Fri, 27 Mar 2015, Peter Zijlstra wrote:
> > We could align the base on 8 bytes to gain an extra bit in the pointer > > and use that bit to indicate the running state. Then these sites can > > spin on that bit while we can change the actual base pointer. > > Even though tvec_base has ____cacheline_aligned stuck on, most are > allocated using kzalloc_node() which does not actually respect that but > already guarantees a minimum u64 alignment, so I think we can use that > third bit without too much magic.
Create a new slab cache for this purpose that does the proper aligning?
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