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From: Mike Rapoport <rppt@kernel.org>
To: Matthew Wilcox <willy@infradead.org>
Cc: Vishal Moola <vishal.moola@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	linux-mm@kvack.org, linux-arch@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org,
	linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev,
	linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org,
	linux-openrisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org,
	linux-sh@vger.kernel.org, sparclinux@vger.kernel.org,
	linux-um@lists.infradead.org, xen-devel@lists.xenproject.org,
	kvm@vger.kernel.org
Subject: Re: [PATCH v2 05/34] mm: add utility functions for ptdesc
Date: Sun, 28 May 2023 08:47:45 +0300	[thread overview]
Message-ID: <20230528054745.GI4967@kernel.org> (raw)
In-Reply-To: <ZHIdK+170XoK2jVe@casper.infradead.org>

On Sat, May 27, 2023 at 04:09:31PM +0100, Matthew Wilcox wrote:
> On Sat, May 27, 2023 at 01:41:44PM +0300, Mike Rapoport wrote:
> > Sorry if I wasn't clear, by "page table page" I meant the page (or memory
> > for that matter) for actual page table rather than struct page describing
> > that memory.
> > 
> > So what we allocate here is the actual memory for the page tables and not
> > the memory for the metadata. That's why I think the name ptdesc_alloc is
> > confusing.
> 
> But that's going to be the common pattern in the Glorious Future.
> You allocate a folio and that includes both the folio memory descriptor
> and the 2^n pages of memory described by that folio.  Similarly for all
> the other memory descriptors.

I'm not arguing with that, I'm not happy about the naming. IMO, the name
should reflect that we allocate memory for page tables rather than for the
descriptor of that memory, say pgtable_alloc() or page_table_alloc().

-- 
Sincerely yours,
Mike.

  reply	other threads:[~2023-05-28  5:48 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-01 19:27 [PATCH v2 00/34] Split ptdesc from struct page Vishal Moola (Oracle)
2023-05-01 19:27 ` [PATCH v2 01/34] mm: Add PAGE_TYPE_OP folio functions Vishal Moola (Oracle)
2023-05-25  8:55   ` Mike Rapoport
2023-05-25 17:00     ` Vishal Moola
2023-05-25 20:20       ` Mike Rapoport
2023-05-25 20:38         ` Vishal Moola
2023-05-25 20:57           ` Matthew Wilcox
2023-05-01 19:27 ` [PATCH v2 02/34] s390: Use _pt_s390_gaddr for gmap address tracking Vishal Moola (Oracle)
2023-05-25  8:58   ` Mike Rapoport
2023-05-25 17:12     ` Vishal Moola
2023-05-01 19:27 ` [PATCH v2 03/34] s390: Use pt_frag_refcount for pagetables Vishal Moola (Oracle)
2023-05-01 19:27 ` [PATCH v2 04/34] pgtable: Create struct ptdesc Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 05/34] mm: add utility functions for ptdesc Vishal Moola (Oracle)
2023-05-25  9:09   ` Mike Rapoport
2023-05-25 18:04     ` Vishal Moola
2023-05-25 20:25       ` Mike Rapoport
2023-05-25 20:53         ` Vishal Moola
2023-05-27 10:41           ` Mike Rapoport
2023-05-27 15:09             ` Matthew Wilcox
2023-05-28  5:47               ` Mike Rapoport [this message]
2023-05-01 19:28 ` [PATCH v2 06/34] mm: Convert pmd_pgtable_page() to pmd_ptdesc() Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 07/34] mm: Convert ptlock_alloc() to use ptdescs Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 08/34] mm: Convert ptlock_ptr() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 09/34] mm: Convert pmd_ptlock_init() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 10/34] mm: Convert ptlock_init() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 11/34] mm: Convert pmd_ptlock_free() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 12/34] mm: Convert ptlock_free() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 13/34] mm: Create ptdesc equivalents for pgtable_{pte,pmd}_page_{ctor,dtor} Vishal Moola (Oracle)
2023-05-25  9:19   ` Mike Rapoport
2023-05-25 18:17     ` Vishal Moola
2023-05-01 19:28 ` [PATCH v2 14/34] powerpc: Convert various functions to use ptdescs Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 15/34] x86: " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 16/34] s390: Convert various gmap " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 17/34] s390: Convert various pgalloc " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 18/34] mm: Remove page table members from struct page Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 19/34] pgalloc: Convert various functions to use ptdescs Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 20/34] arm: " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 21/34] arm64: " Vishal Moola (Oracle)
2023-05-02  1:48   ` kernel test robot
2023-05-02  2:21   ` kernel test robot
2023-05-01 19:28 ` [PATCH v2 22/34] csky: Convert __pte_free_tlb() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 23/34] hexagon: " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 24/34] loongarch: Convert various functions " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 25/34] m68k: " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 26/34] mips: " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 27/34] nios2: Convert __pte_free_tlb() " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 28/34] openrisc: " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 29/34] riscv: Convert alloc_{pmd, pte}_late() " Vishal Moola (Oracle)
2023-05-01 20:59   ` Palmer Dabbelt
2023-05-01 19:28 ` [PATCH v2 30/34] sh: Convert pte_free_tlb() " Vishal Moola (Oracle)
2023-05-06 11:35   ` John Paul Adrian Glaubitz
2023-05-15 19:11     ` Vishal Moola
2023-05-01 19:28 ` [PATCH v2 31/34] sparc64: Convert various functions " Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 32/34] sparc: Convert pgtable_pte_page_{ctor, dtor}() to ptdesc equivalents Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 33/34] um: Convert {pmd, pte}_free_tlb() to use ptdescs Vishal Moola (Oracle)
2023-05-01 19:28 ` [PATCH v2 34/34] mm: Remove pgtable_{pmd, pte}_page_{ctor, dtor}() wrappers Vishal Moola (Oracle)
2023-05-18 12:12 ` [PATCH v2 00/34] Split ptdesc from struct page Jason Gunthorpe

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