From: Jiaqi Yan <jiaqiyan@google.com>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: Peter Xu <peterx@redhat.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
Gavin Shan <gshan@redhat.com>,
Catalin Marinas <catalin.marinas@arm.com>,
x86@kernel.org, Ingo Molnar <mingo@redhat.com>,
Andrew Morton <akpm@linux-foundation.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Alistair Popple <apopple@nvidia.com>,
kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
Sean Christopherson <seanjc@google.com>,
Oscar Salvador <osalvador@suse.de>,
Borislav Petkov <bp@alien8.de>, Zi Yan <ziy@nvidia.com>,
Axel Rasmussen <axelrasmussen@google.com>,
David Hildenbrand <david@redhat.com>,
Yan Zhao <yan.y.zhao@intel.com>, Will Deacon <will@kernel.org>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
Alex Williamson <alex.williamson@redhat.com>
Subject: Re: [PATCH v2 00/19] mm: Support huge pfnmaps
Date: Wed, 28 Aug 2024 09:10:34 -0700 [thread overview]
Message-ID: <CACw3F53QfJ4anR0Fk=MHJv8ad_vcG-575DX=bp7mfPpzLgUxbQ@mail.gmail.com> (raw)
In-Reply-To: <20240828142422.GU3773488@nvidia.com>
On Wed, Aug 28, 2024 at 7:24 AM Jason Gunthorpe <jgg@nvidia.com> wrote:
>
> On Tue, Aug 27, 2024 at 05:42:21PM -0700, Jiaqi Yan wrote:
>
> > Instead of removing the whole pud, can driver or memory_failure do
> > something similar to non-struct-page-version of split_huge_page? So
> > driver doesn't need to re-fault good pages back?
>
> It would be far nicer if we didn't have to poke a hole in a 1G mapping
> just for memory failure reporting.
If I follow this, which of the following sounds better? 1. remove pud
and rely on the driver to re-fault PFNs that it knows are not poisoned
(what Peter suggested), or 2. keep the pud and allow access to both
good and bad PFNs.
Or provide some knob (configured by ?) so that kernel + driver can
switch between the two?
>
> Jason
next prev parent reply other threads:[~2024-08-28 16:10 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-26 20:43 Peter Xu
2024-08-26 20:43 ` [PATCH v2 01/19] mm: Introduce ARCH_SUPPORTS_HUGE_PFNMAP and special bits to pmd/pud Peter Xu
2024-08-26 20:43 ` [PATCH v2 02/19] mm: Drop is_huge_zero_pud() Peter Xu
2024-08-26 20:43 ` [PATCH v2 03/19] mm: Mark special bits for huge pfn mappings when inject Peter Xu
2024-08-28 15:31 ` David Hildenbrand
2024-08-26 20:43 ` [PATCH v2 04/19] mm: Allow THP orders for PFNMAPs Peter Xu
2024-08-28 15:31 ` David Hildenbrand
2024-08-26 20:43 ` [PATCH v2 05/19] mm/gup: Detect huge pfnmap entries in gup-fast Peter Xu
2024-08-26 20:43 ` [PATCH v2 06/19] mm/pagewalk: Check pfnmap for folio_walk_start() Peter Xu
2024-08-28 7:44 ` David Hildenbrand
2024-08-28 14:24 ` Peter Xu
2024-08-28 15:30 ` David Hildenbrand
2024-08-28 19:45 ` Peter Xu
2024-08-28 23:46 ` Jason Gunthorpe
2024-08-29 6:35 ` David Hildenbrand
2024-08-29 18:45 ` Peter Xu
2024-08-29 15:10 ` David Hildenbrand
2024-08-29 18:49 ` Peter Xu
2024-08-26 20:43 ` [PATCH v2 07/19] mm/fork: Accept huge pfnmap entries Peter Xu
2024-08-29 15:10 ` David Hildenbrand
2024-08-29 18:26 ` Peter Xu
2024-08-29 19:44 ` David Hildenbrand
2024-08-29 20:01 ` Peter Xu
2024-09-02 7:58 ` Yan Zhao
2024-09-03 21:23 ` Peter Xu
2024-09-09 22:25 ` Andrew Morton
2024-09-09 22:43 ` Peter Xu
2024-09-09 23:15 ` Andrew Morton
2024-09-10 0:08 ` Peter Xu
2024-09-10 2:52 ` Yan Zhao
2024-09-10 12:16 ` Peter Xu
2024-09-11 2:16 ` Yan Zhao
2024-09-11 14:34 ` Peter Xu
2024-08-26 20:43 ` [PATCH v2 08/19] mm: Always define pxx_pgprot() Peter Xu
2024-08-26 20:43 ` [PATCH v2 09/19] mm: New follow_pfnmap API Peter Xu
2024-08-26 20:43 ` [PATCH v2 10/19] KVM: Use " Peter Xu
2024-08-26 20:43 ` [PATCH v2 11/19] s390/pci_mmio: " Peter Xu
2024-08-26 20:43 ` [PATCH v2 12/19] mm/x86/pat: Use the new " Peter Xu
2024-08-26 20:43 ` [PATCH v2 13/19] vfio: " Peter Xu
2024-08-26 20:43 ` [PATCH v2 14/19] acrn: " Peter Xu
2024-08-26 20:43 ` [PATCH v2 15/19] mm/access_process_vm: " Peter Xu
2024-08-26 20:43 ` [PATCH v2 16/19] mm: Remove follow_pte() Peter Xu
2024-09-01 4:33 ` Yu Zhao
2024-09-01 13:39 ` David Hildenbrand
2024-08-26 20:43 ` [PATCH v2 17/19] mm/x86: Support large pfn mappings Peter Xu
2024-08-26 20:43 ` [PATCH v2 18/19] mm/arm64: " Peter Xu
2025-03-19 22:22 ` Keith Busch
2025-03-19 22:46 ` Peter Xu
2025-03-19 22:53 ` Keith Busch
2024-08-26 20:43 ` [PATCH v2 19/19] vfio/pci: Implement huge_fault support Peter Xu
2024-08-27 22:36 ` [PATCH v2 00/19] mm: Support huge pfnmaps Jiaqi Yan
2024-08-27 22:57 ` Peter Xu
2024-08-28 0:42 ` Jiaqi Yan
2024-08-28 0:46 ` Jiaqi Yan
2024-08-28 14:24 ` Jason Gunthorpe
2024-08-28 16:10 ` Jiaqi Yan [this message]
2024-08-28 23:49 ` Jason Gunthorpe
2024-08-29 19:21 ` Jiaqi Yan
2024-09-04 15:52 ` Jason Gunthorpe
2024-09-04 16:38 ` Jiaqi Yan
2024-09-04 16:43 ` Jason Gunthorpe
2024-09-04 16:58 ` Jiaqi Yan
2024-09-04 17:00 ` Jason Gunthorpe
2024-09-04 17:07 ` Jiaqi Yan
2024-09-09 3:56 ` Ankit Agrawal
2024-08-28 14:41 ` Peter Xu
2024-08-28 16:23 ` Jiaqi Yan
2024-09-09 4:03 ` Ankit Agrawal
2024-09-09 15:03 ` Peter Xu
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