From: Jason Gunthorpe <jgg@nvidia.com>
To: Peter Xu <peterx@redhat.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Sean Christopherson <seanjc@google.com>,
Oscar Salvador <osalvador@suse.de>,
Axel Rasmussen <axelrasmussen@google.com>,
linux-arm-kernel@lists.infradead.org, x86@kernel.org,
Will Deacon <will@kernel.org>, Gavin Shan <gshan@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>, Zi Yan <ziy@nvidia.com>,
Andrew Morton <akpm@linux-foundation.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Ingo Molnar <mingo@redhat.com>,
Alistair Popple <apopple@nvidia.com>,
Borislav Petkov <bp@alien8.de>,
David Hildenbrand <david@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
kvm@vger.kernel.org, Dave Hansen <dave.hansen@linux.intel.com>,
Alex Williamson <alex.williamson@redhat.com>,
Yan Zhao <yan.y.zhao@intel.com>
Subject: Re: [PATCH 03/19] mm: Mark special bits for huge pfn mappings when inject
Date: Wed, 14 Aug 2024 09:40:00 -0300 [thread overview]
Message-ID: <20240814124000.GD2032816@nvidia.com> (raw)
In-Reply-To: <20240809160909.1023470-4-peterx@redhat.com>
On Fri, Aug 09, 2024 at 12:08:53PM -0400, Peter Xu wrote:
> We need these special bits to be around to enable gup-fast on pfnmaps.
It is not gup-fast you are after but follow_pfn/etc for KVM usage
right?
GUP family of functions should all fail on pfnmaps.
> Mark properly for !devmap case, reflecting that there's no page struct
> backing the entry.
>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
> mm/huge_memory.c | 4 ++++
> 1 file changed, 4 insertions(+)
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Jason
next prev parent reply other threads:[~2024-08-14 12:40 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-09 16:08 [PATCH 00/19] mm: Support huge pfnmaps Peter Xu
2024-08-09 16:08 ` [PATCH 01/19] mm: Introduce ARCH_SUPPORTS_HUGE_PFNMAP and special bits to pmd/pud Peter Xu
2024-08-09 16:34 ` David Hildenbrand
2024-08-09 17:16 ` Peter Xu
2024-08-09 18:06 ` David Hildenbrand
2024-08-09 16:08 ` [PATCH 02/19] mm: Drop is_huge_zero_pud() Peter Xu
2024-08-09 16:34 ` David Hildenbrand
2024-08-14 12:38 ` Jason Gunthorpe
2024-08-09 16:08 ` [PATCH 03/19] mm: Mark special bits for huge pfn mappings when inject Peter Xu
2024-08-14 12:40 ` Jason Gunthorpe [this message]
2024-08-14 15:23 ` Peter Xu
2024-08-14 15:53 ` Jason Gunthorpe
2024-08-09 16:08 ` [PATCH 04/19] mm: Allow THP orders for PFNMAPs Peter Xu
2024-08-14 12:40 ` Jason Gunthorpe
2024-08-09 16:08 ` [PATCH 05/19] mm/gup: Detect huge pfnmap entries in gup-fast Peter Xu
2024-08-09 16:23 ` David Hildenbrand
2024-08-09 16:59 ` Peter Xu
2024-08-14 12:42 ` Jason Gunthorpe
2024-08-14 15:34 ` Peter Xu
2024-08-14 12:41 ` Jason Gunthorpe
2024-08-09 16:08 ` [PATCH 07/19] mm/fork: Accept huge pfnmap entries Peter Xu
2024-08-09 16:32 ` David Hildenbrand
2024-08-09 17:15 ` Peter Xu
2024-08-09 17:59 ` David Hildenbrand
2024-08-12 18:29 ` Peter Xu
2024-08-12 18:50 ` David Hildenbrand
2024-08-12 19:05 ` Peter Xu
2024-08-09 16:08 ` [PATCH 08/19] mm: Always define pxx_pgprot() Peter Xu
2024-08-14 13:09 ` Jason Gunthorpe
2024-08-14 15:43 ` Peter Xu
2024-08-09 16:08 ` [PATCH 09/19] mm: New follow_pfnmap API Peter Xu
2024-08-14 13:19 ` Jason Gunthorpe
2024-08-14 18:24 ` Peter Xu
2024-08-14 22:14 ` Jason Gunthorpe
2024-08-15 15:41 ` Peter Xu
2024-08-15 16:16 ` Jason Gunthorpe
2024-08-15 17:21 ` Peter Xu
2024-08-15 17:24 ` Jason Gunthorpe
2024-08-15 18:52 ` Peter Xu
2024-08-16 23:12 ` Sean Christopherson
2024-08-17 11:05 ` David Hildenbrand
2024-08-21 19:10 ` Peter Xu
2024-08-09 16:09 ` [PATCH 10/19] KVM: Use " Peter Xu
2024-08-09 17:23 ` Axel Rasmussen
2024-08-12 18:58 ` Peter Xu
2024-08-12 22:47 ` Axel Rasmussen
2024-08-12 23:44 ` Sean Christopherson
2024-08-14 13:15 ` Jason Gunthorpe
2024-08-14 14:23 ` Sean Christopherson
2024-08-09 16:09 ` [PATCH 11/19] s390/pci_mmio: " Peter Xu
2024-08-09 16:09 ` [PATCH 12/19] mm/x86/pat: Use the new " Peter Xu
2024-08-09 16:09 ` [PATCH 13/19] vfio: " Peter Xu
2024-08-14 13:20 ` Jason Gunthorpe
2024-08-09 16:09 ` [PATCH 14/19] acrn: " Peter Xu
2024-08-09 16:09 ` [PATCH 15/19] mm/access_process_vm: " Peter Xu
2024-08-09 16:09 ` [PATCH 16/19] mm: Remove follow_pte() Peter Xu
2024-08-09 16:09 ` [PATCH 17/19] mm/x86: Support large pfn mappings Peter Xu
2024-08-09 16:09 ` [PATCH 18/19] mm/arm64: " Peter Xu
2024-08-09 16:09 ` [PATCH 19/19] vfio/pci: Implement huge_fault support Peter Xu
2024-08-14 13:25 ` Jason Gunthorpe
2024-08-14 16:08 ` Alex Williamson
2024-08-14 16:24 ` Jason Gunthorpe
[not found] ` <20240809160909.1023470-7-peterx@redhat.com>
2024-08-09 16:20 ` [PATCH 06/19] mm/pagewalk: Check pfnmap early for folio_walk_start() David Hildenbrand
2024-08-09 16:54 ` Peter Xu
2024-08-09 17:25 ` David Hildenbrand
2024-08-09 21:37 ` Peter Xu
2024-08-14 13:05 ` Jason Gunthorpe
2024-08-16 9:30 ` David Hildenbrand
2024-08-16 14:21 ` Peter Xu
2024-08-16 17:38 ` Jason Gunthorpe
2024-08-21 18:42 ` Peter Xu
2024-08-16 17:56 ` David Hildenbrand
2024-08-19 12:19 ` Jason Gunthorpe
2024-08-19 14:19 ` Sean Christopherson
2024-08-09 18:12 ` [PATCH 00/19] mm: Support huge pfnmaps David Hildenbrand
2024-08-14 12:37 ` Jason Gunthorpe
2024-08-14 14:35 ` Sean Christopherson
2024-08-14 14:42 ` Paolo Bonzini
2024-08-14 14:43 ` Jason Gunthorpe
2024-08-14 20:54 ` Sean Christopherson
2024-08-14 22:00 ` Sean Christopherson
2024-08-14 22:10 ` Jason Gunthorpe
2024-08-14 23:36 ` Oliver Upton
2024-08-14 23:27 ` Oliver Upton
2024-08-14 23:38 ` Oliver Upton
2024-08-15 0:23 ` Sean Christopherson
2024-08-15 19:20 ` Peter Xu
2024-08-16 3:05 ` Kefeng Wang
2024-08-16 14:33 ` Peter Xu
2024-08-19 13:14 ` Kefeng Wang
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