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b=l0J1WW1NdC8WUCI+4hObk9BmgQxnhkoM5huUcC2I9a8fgeLpyDG+w8x6XSXMb/8G5 sIm5hRmA4p+smRwNrCiLU09vUZyeobDqwyLdbp8AuGN1I/9KSHfoq5n5FnYcdcXcVl vcziya8SDDOlEJC7tZlrqDsd+YvKSvEq0h+kHaFGpeL9c9GnheAcfBomKLqKJdbjIi +VBPi2jblFrzPStVsKWuqyhE0hV2ycsBtYK38gH5f4+nuRA+ES7S0XOu5wQyjT8Pzt lWHtufmEY41W/Da7nfjvrsLcVQOJSiE5GhPUijyo9kUYEXA9TxcULKh7QsON1XrPlY nrUj/W3+nFzJg== Message-ID: <32873b50-c900-4fe5-9dc1-cb086bba77e7@kernel.org> Date: Thu, 13 Aug 2026 09:20:54 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 05/15] guest_memfd: Use folio_has_hwpoisoned_page() To: "Matthew Wilcox (Oracle)" , Andrew Morton , Jane Chu , linux-mm@kvack.org Cc: Muchun Song , Oscar Salvador , Miaohe Lin , Naoya Horiguchi , Jan Kara , linux-fsdevel@vger.kernel.org, Christian Brauner , Jiaqi Yan , Sean Christopherson , Ackerley Tng , Gregory Price References: <20260805210557.1118966-1-willy@infradead.org> <20260805210557.1118966-6-willy@infradead.org> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 8D878100004 X-Stat-Signature: kxok9okh3s5fzpdu78n4iqakcqg7h39g X-Rspam-User: X-Rspamd-Server: rspam11 X-HE-Tag: 1786605660-716468 X-HE-Meta: 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 WKELhShu EWRXx5f2NTqYRwryit4hzgEdIF+EAuk37jzqijjMaC48VlMNy3Pgoh/3vDrwrAlfALeiq5eQLp0h3O1lxAvU557iup9EmKVCoU1YsOJEE2cWNOdlQSu4EU9BSYf4Q3rWvyOdbY29PZnRkGizQ7PPTAP+XLvXKldJeTPa38AhaALYKL9s0j3AwnZR2m4WyoDYbd3Q21dCFawM8Eur1c176qKOcfEuOBtwBhU84NcTgjNp0AQvuj2gVJQpDsRneM4qASoVg5QrQ/p1uHgi7ld1GX7U5OHoGPZmAQIWC4TiHlbc/vNdXZwGt4saPS+HIhuVbtTX41dyTET0Fz0D3W64WDdkibd9PwMRp3kIBL6sQtJOrDevwD7RdrR45uJMZM3nBrWgaEW1H5HkwSqBOlxuDt1DaAuzSh16OCSV65z6aJc2i9CssW5o5XtCRyLsP6HAtpPZ1wiFO2QeLorIX8FtOb6f9SCDC4N8IuRKVPWGOI8OKDPdSDjJX2mPko28yUw3B0h3aYM4GmeD0VoJCS80AR7lB21fP+v1EEfQSkIPgm78bu7IRh+YY5T2KeXDbQ9xOy3GI Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 8/5/26 23:05, Matthew Wilcox (Oracle) wrote: > folio_test_hwpoison() only works on hugetlb folios today and will give > the wrong answer for other large folios. folio_has_hwpoisoned_page() > works on both. > > Signed-off-by: Matthew Wilcox (Oracle) > Acked-by: Sean Christopherson > Reviewed-by: Ackerley Tng > Reviewed-by: Gregory Price > Reviewed-by: Jane Chu > --- > virt/kvm/guest_memfd.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c > index db57c5766ab6..94eedcc7f1a9 100644 > --- a/virt/kvm/guest_memfd.c > +++ b/virt/kvm/guest_memfd.c > @@ -774,7 +774,7 @@ static struct folio *__kvm_gmem_get_pfn(struct file *file, > if (IS_ERR(folio)) > return folio; > > - if (folio_test_hwpoison(folio)) { > + if (folio_has_hwpoisoned_page(folio)) { > folio_unlock(folio); > folio_put(folio); > return ERR_PTR(-EHWPOISON); guest_memfd only uses small folios, so it doesn't really matter. Acked-by: David Hildenbrand (Arm) -- Cheers, David