Re: [v3 0/9] parallelized "struct page" zeroing

David Miller
2017-05-12T16:57:08Z

From: Pasha Tatashin <pasha.tatashin@oracle.com>
Date: Thu, 11 May 2017 16:59:33 -0400

> We should either keep memset() only for deferred struct pages as what
> I have in my patches.
>
> Another option is to add a new function struct_page_clear() which
> would default to memset() and to something else on platforms that
> decide to optimize it.
>
> On SPARC it would call STBIs, and we would do one membar call after
> all "struct pages" are initialized.

No membars will be performed for single individual page struct clear,
the cutoff to use the STBI is larger than that.