Re: [tip:x86/mm] percpu: Introduce a read-mostly percpu API

[Eric Dumazet]

Le mercredi 20 octobre 2010 Ã 22:54 -0700, H. Peter Anvin a Ãcrit :

> L1_CACHE_BYTES is completely pointless, since if there is sharing to
> worry about *at all*, it's probably at the L2 or L3 cache levels.
> 

I see, and we dont have better way to express this hint/requirement than
using PAGE_SIZE or INTERNODE_CACHE_SHIFT ?

In your patch you force a PAGE_SIZE alignement *before*
*(.data..percpu..page_aligned)   

If this alignment is really needed, this should be part of another
patch, since this fixes a previous bug in 2.6.36 ?



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