On Thu, 15 Jan 2015, Andrew Morton wrote: > And perhaps some explanation here as to why virt_to_head_page() can > safely use compound_head_fast(). There's an assumption here that > nobody will be dismantling the compound page while virt_to_head_page() > is in progress, yes? And this assumption also holds for the calling > code, because otherwise the virt_to_head_page() return value is kinda > meaningless.
I think this assumption is pretty natural to make. A coupound_head that works well while dismantling a compound page should be marked specially and Joonsoo's definition should be the standard. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
