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Date: Thu, 14 Oct 2021 17:52:35 +0100 From: Matthew Wilcox <willy@...radead.org> 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, jgg@...dia.com, jglisse@...hat.com, apopple@...dia.com Subject: Re: [PATCH v1 2/2] mm: remove extra ZONE_DEVICE struct page refcount On Thu, Oct 14, 2021 at 10:39:28AM -0500, Alex Sierra wrote: > From: Ralph Campbell <rcampbell@...dia.com> > > ZONE_DEVICE struct pages have an extra reference count that complicates the > code for put_page() and several places in the kernel that need to check the > reference count to see that a page is not being used (gup, compaction, > migration, etc.). Clean up the code so the reference count doesn't need to > be treated specially for ZONE_DEVICE. > > Signed-off-by: Ralph Campbell <rcampbell@...dia.com> > Signed-off-by: Alex Sierra <alex.sierra@....com> > Reviewed-by: Christoph Hellwig <hch@....de> Reviewed-by: Matthew Wilcox (Oracle) <willy@...radead.org>
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