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Date: Tue, 20 Jul 2021 13:43:21 +0300 From: Mike Rapoport <rppt@...nel.org> To: "Matthew Wilcox (Oracle)" <willy@...radead.org> Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, linux-fsdevel@...r.kernel.org, Christoph Hellwig <hch@....de>, Jeff Layton <jlayton@...nel.org>, "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>, Vlastimil Babka <vbabka@...e.cz>, William Kucharski <william.kucharski@...cle.com>, David Howells <dhowells@...hat.com> Subject: Re: [PATCH v14 010/138] mm: Add folio flag manipulation functions On Thu, Jul 15, 2021 at 04:34:56AM +0100, Matthew Wilcox (Oracle) wrote: > These new functions are the folio analogues of the various PageFlags > functions. If CONFIG_DEBUG_VM_PGFLAGS is enabled, we check the folio > is not a tail page at every invocation. This will also catch the > PagePoisoned case as a poisoned page has every bit set, which would > include PageTail. > > This saves 1684 bytes of text with the distro-derived config that > I'm testing due to removing a double call to compound_head() in > PageSwapCache(). > > Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org> > Reviewed-by: Christoph Hellwig <hch@....de> > Acked-by: Jeff Layton <jlayton@...nel.org> > Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com> > Acked-by: Vlastimil Babka <vbabka@...e.cz> > Reviewed-by: William Kucharski <william.kucharski@...cle.com> > Reviewed-by: David Howells <dhowells@...hat.com> > --- > include/linux/page-flags.h | 219 ++++++++++++++++++++++++++----------- > 1 file changed, 156 insertions(+), 63 deletions(-) Acked-by: Mike Rapoport <rppt@...ux.ibm.com>
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