Re: [PATCH v14 010/138] mm: Add folio flag manipulation functions
From: Mike Rapoport <rppt@kernel.org>
Date: 2021-07-20 10:45:50
Also in:
linux-fsdevel, lkml
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@infradead.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Jeff Layton <jlayton@kernel.org> Acked-by: Kirill A. Shutemov <redacted> Acked-by: Vlastimil Babka <redacted> Reviewed-by: William Kucharski <redacted> Reviewed-by: David Howells <dhowells@redhat.com> --- include/linux/page-flags.h | 219 ++++++++++++++++++++++++++----------- 1 file changed, 156 insertions(+), 63 deletions(-)
Acked-by: Mike Rapoport <redacted>