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Date: Thu, 14 Oct 2021 13:25:06 -0300 From: Jason Gunthorpe <jgg@...dia.com> To: Alex Sierra <alex.sierra@....com> Cc: akpm@...ux-foundation.org, Felix.Kuehling@....com, linux-mm@...ck.org, rcampbell@...dia.com, linux-ext4@...r.kernel.org, linux-xfs@...r.kernel.org, amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org, hch@....de, jglisse@...hat.com, apopple@...dia.com, willy@...radead.org Subject: Re: [PATCH v1 1/2] ext4/xfs: add page refcount helper On Thu, Oct 14, 2021 at 10:39:27AM -0500, Alex Sierra wrote: > From: Ralph Campbell <rcampbell@...dia.com> > > There are several places where ZONE_DEVICE struct pages assume a reference > count == 1 means the page is idle and free. Instead of open coding this, > add a helper function to hide this detail. > > Signed-off-by: Ralph Campbell <rcampbell@...dia.com> > Signed-off-by: Alex Sierra <alex.sierra@....com> > Reviewed-by: Christoph Hellwig <hch@....de> > Acked-by: Theodore Ts'o <tytso@....edu> > Acked-by: Darrick J. Wong <djwong@...nel.org> > --- > v3: > [AS]: rename dax_layout_is_idle_page func to dax_page_unused > > v4: > [AS]: This ref count functionality was missing on fuse/dax.c. > --- > fs/dax.c | 4 ++-- > fs/ext4/inode.c | 5 +---- > fs/fuse/dax.c | 4 +--- > fs/xfs/xfs_file.c | 4 +--- > include/linux/dax.h | 10 ++++++++++ > 5 files changed, 15 insertions(+), 12 deletions(-) Reviewed-by: Jason Gunthorpe <jgg@...dia.com> Jason
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