From: Matthew Wilcox <willy@infradead.org>
To: Sean Christopherson <seanjc@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Jane Chu <jane.chu@oracle.com>,
linux-mm@kvack.org, kvm@vger.kernel.org,
Paolo Bonzini <pbonzini@redhat.com>,
Ackerley Tng <ackerleytng@google.com>,
Michael Roth <michael.roth@amd.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Muchun Song <muchun.song@linux.dev>,
Oscar Salvador <osalvador@suse.de>,
David Hildenbrand <david@kernel.org>,
Miaohe Lin <linmiaohe@huawei.com>,
Naoya Horiguchi <nao.horiguchi@gmail.com>,
Jan Kara <jack@suse.cz>,
linux-fsdevel@vger.kernel.org,
Christian Brauner <christian@brauner.io>,
Jiaqi Yan <jiaqiyan@google.com>
Subject: Re: [PATCH v4 05/14] guest_memfd: Use folio_has_hwpoisoned_page()
Date: Fri, 24 Jul 2026 19:04:52 +0100 [thread overview]
Message-ID: <amOpRMpkyFGm0j9c@casper.infradead.org> (raw)
In-Reply-To: <amOByZH4oWzmO3Zj@google.com>
On Fri, Jul 24, 2026 at 08:16:25AM -0700, Sean Christopherson wrote:
> Heh, you don't want to sign up for a week or two of onion peeling?
Oh, you have no idea!
Here's my onion so far ...
1. I want to simplify filemap_fault()
2. That requires changing all the architecture fault handlers
3. So let's push some of that down to the MM with a new wrapper around
handle_mm_fault()
4. This would be easier if we could hoist the creation of struct
vm_fault from __handle_mm_fault() to handle_mm_fault()
5. Which would be possible if Jane's series to fix hugetlb use of pgoff
had landed
6. Oh, hang on, handling hwpoison on hugetlb is actually broken in a
few different ways (some pointed out by Sashiko, some I noticed
myself)
I honestly thought I was just going to rearrange Jane's patch series
a bit and resubmit it, but fixing the hugetlb hwpoison handling has
consumed me for the past couple of weeks.
next prev parent reply other threads:[~2026-07-24 18:05 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-23 14:30 [PATCH v4 00/14] Use generic_file_read_iter() in hugetlbfs Matthew Wilcox (Oracle)
2026-07-23 14:30 ` [PATCH v4 01/14] memory-failure: Fix hardware poison check in unpoison_memory() again Matthew Wilcox (Oracle)
2026-07-24 12:32 ` Matthew Wilcox
2026-07-23 14:30 ` [PATCH v4 02/14] memory-failure: Test the page is hwpoison before taking the mutex Matthew Wilcox (Oracle)
2026-07-24 12:34 ` Matthew Wilcox
2026-07-23 14:30 ` [PATCH v4 03/14] mm: Rename folio_contain_hwpoison_page() to folio_has_hwpoison_page() Matthew Wilcox (Oracle)
2026-07-24 12:36 ` Matthew Wilcox
2026-07-24 12:52 ` Michael S. Tsirkin
2026-07-24 13:24 ` Matthew Wilcox
2026-07-23 14:30 ` [PATCH v4 04/14] hugetlb: Mark some function arguments as const Matthew Wilcox (Oracle)
2026-07-24 12:38 ` Matthew Wilcox
2026-07-23 14:30 ` [PATCH v4 05/14] guest_memfd: Use folio_has_hwpoisoned_page() Matthew Wilcox (Oracle)
2026-07-24 12:44 ` Matthew Wilcox
2026-07-24 15:16 ` Sean Christopherson
2026-07-24 16:51 ` Ackerley Tng
2026-07-24 18:04 ` Matthew Wilcox [this message]
2026-07-24 15:16 ` Sean Christopherson
2026-07-24 16:40 ` Ackerley Tng
2026-07-23 14:30 ` [PATCH v4 06/14] memory-failure: Remove raw_hwp_list_head() Matthew Wilcox (Oracle)
2026-07-24 12:45 ` Matthew Wilcox
2026-07-23 14:30 ` [PATCH v4 07/14] hugetlb: Use the has_hwpoisoned flag Matthew Wilcox (Oracle)
2026-07-24 13:21 ` Matthew Wilcox
2026-07-23 14:30 ` [PATCH v4 08/14] mm: Remove locking mf_mutex in is_raw_hwpoison_page_in_hugepage() Matthew Wilcox (Oracle)
2026-07-24 13:41 ` Matthew Wilcox
2026-07-23 14:30 ` [PATCH v4 09/14] mm: Check individual hugetlb pages for poison Matthew Wilcox (Oracle)
2026-07-24 14:00 ` Matthew Wilcox
2026-07-23 14:30 ` [PATCH v4 10/14] filemap: Add hwpoison handling to filemap_read() Matthew Wilcox (Oracle)
2026-07-24 16:06 ` Matthew Wilcox
2026-07-23 14:30 ` [PATCH v4 11/14] filemap: Remove checks in mapping_set_folio_order_range() Matthew Wilcox (Oracle)
2026-07-24 16:08 ` Matthew Wilcox
2026-07-23 14:30 ` [PATCH v4 12/14] hugetlb: Set mapping folio order Matthew Wilcox (Oracle)
2026-07-24 16:16 ` Matthew Wilcox
2026-07-23 14:30 ` [PATCH v4 13/14] filemap: Add support for authoritative mappings Matthew Wilcox (Oracle)
2026-07-24 16:15 ` Matthew Wilcox
2026-07-24 16:29 ` Matthew Wilcox
2026-07-23 14:30 ` [PATCH v4 14/14] hugetlb: replace hugetlbfs_read_iter() with generic_file_read_iter() Matthew Wilcox (Oracle)
2026-07-24 16:36 ` Matthew Wilcox
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