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Date: Thu, 16 Jan 2014 02:16:54 +0200 From: "Kirill A. Shutemov" <kirill@...temov.name> To: Dave Hansen <dave@...1.net> Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org, akpm@...ux-foundation.org, penberg@...nel.org, cl@...ux-foundation.org Subject: Re: [RFC][PATCH 3/9] mm: page->pfmemalloc only used by slab/skb On Tue, Jan 14, 2014 at 10:00:51AM -0800, Dave Hansen wrote: > > From: Dave Hansen <dave.hansen@...ux.intel.com> > > page->pfmemalloc does not deserve a spot in 'struct page'. It is > only used transiently _just_ after a page leaves the buddy > allocator. > > Instead of declaring a union, we move its functionality behind a > few quick accessor functions. This way we could also much more > easily audit that it is being used correctly in debugging > scenarios. For instance, we could store a magic number in there > which could never get reused as a page->index and check that the > magic number exists in page_pfmemalloc(). > > Signed-off-by: Dave Hansen <dave.hansen@...ux.intel.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com> -- Kirill A. Shutemov -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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