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b=haCcH78Zp/m539QhWqu+sd7oXAcejudjaL37QL9yWQGnsiobVQeble+LIE9uHZWdh wkZ3PV/mcdhwo52hfyTMQBO1Ysj6eJjhWkRnZoD5Gj75WtgLRp+3EMSQq7XpzeXB6d rOLVKpUYwo7QHTAYPQSDjffNYj2iGRmc8M8+EV/+cPHBoBlIZ7Lo8xq73w68lD7vbt KIGrqaSxgrlPxmUvFn5B6jkeAlUWlYGXajPb48a4hHaYd176H0OBNV6e+4eZQFFI22 NMySX+bOPrd0h2nG01qqgGjtyb5wlJ/moLFtMivrUCLyqJsNyu8f8maiZ8gQJEAEKc fInbwEp5x7fnA== Message-ID: <3e609c64-a393-4667-be74-6cb2bbdcb717@kernel.org> Date: Thu, 13 Aug 2026 09:25:07 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v9 06/15] kpageflags: Use is_page_hwpoison() to set KPF_HWPOISON 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 , "Gregory Price (Meta)" References: <20260805210557.1118966-1-willy@infradead.org> <20260805210557.1118966-7-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-Server: rspam02 X-Rspamd-Queue-Id: 77A6340002 X-Stat-Signature: umqie9bsmmr1ufhweju3g7mu1g1xrhr7 X-Rspam-User: X-HE-Tag: 1786605914-339600 X-HE-Meta: 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 JQSMZtt8 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 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: > Instead of knowing how hugetlb handles hwpoison, just ask > is_page_hwpoison(). This gives us the flexibility to change how hwpoison > is handled without updating this function in the future. > > Signed-off-by: Matthew Wilcox (Oracle) > Reviewed-by: Jane Chu > Reviewed-by: Gregory Price (Meta) > --- > fs/proc/page.c | 8 ++------ > 1 file changed, 2 insertions(+), 6 deletions(-) > > diff --git a/fs/proc/page.c b/fs/proc/page.c > index 7d9387143435..323e4c049f69 100644 > --- a/fs/proc/page.c > +++ b/fs/proc/page.c > @@ -233,12 +233,8 @@ u64 stable_page_flags(const struct page *page) > u |= kpf_copy_bit(k, KPF_UNEVICTABLE, PG_unevictable); > u |= kpf_copy_bit(k, KPF_MLOCKED, PG_mlocked); > > -#ifdef CONFIG_MEMORY_FAILURE > - if (u & (1 << KPF_HUGE)) > - u |= kpf_copy_bit(k, KPF_HWPOISON, PG_hwpoison); > - else > - u |= kpf_copy_bit(ps.page_snapshot.flags.f, KPF_HWPOISON, PG_hwpoison); > -#endif > + if (is_page_hwpoison(page)) > + u |= 1 << KPF_HWPOISON; snapshot_page() takes a snapshot of the folio and the page. If you look at "page", you start going to the live version again. -- Cheers, David