Re: [PATCH 2/2] mm: Indicate pfmemalloc pages in compound_head
From: Matthew Wilcox <willy@infradead.org>
Date: 2021-04-17 21:29:06
Also in:
linux-mips, linux-mm, linuxppc-dev, lkml, netdev
On Sat, Apr 17, 2021 at 09:13:45PM +0000, David Laight wrote:
quoted
struct { /* page_pool used by netstack */ - /** - * @dma_addr: might require a 64-bit value on - * 32-bit architectures. - */ + unsigned long pp_magic; + unsigned long xmi; + unsigned long _pp_mapping_pad; unsigned long dma_addr[2]; };You've deleted the comment.
Yes. It no longer added any value. You can see dma_addr now occupies two words.
I also think there should be a comment that dma_addr[0] must be aliased to ->index.
That's not a requirement. Moving the pfmemalloc indicator is a requirement so that we _can_ use index, but there's no requirement about how index is used. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel