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bh=xNjcXkzBl0rT1jua2g5Gzg5y2mYFMrHw3FMsPVkHyeA=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=G2J5Ld4T7TV7ZlsznfjwSTiR/SuoHamqf7xMsSdDi2YnU7+Qlq1LkmorcWRK0F1aE m94APRGdhWMf+6QrKNjzvruBKIwDnjQPBvybxoWj2daM2D+4kMRgoxAe2j+OoCABQ4 9d7naNJ+Oz+YQK9/ipsqYo3MRwGq3wAaM/RQjYgk= Date: Wed, 18 Jan 2023 15:29:20 -0800 From: Andrew Morton To: Jiaqi Yan Cc: kirill.shutemov@linux.intel.com, kirill@shutemov.name, shy828301@gmail.com, tongtiangen@huawei.com, tony.luck@intel.com, wangkefeng.wang@huawei.com, naoya.horiguchi@nec.com, linmiaohe@huawei.com, linux-mm@kvack.org, osalvador@suse.de Subject: Re: [PATCH v9 0/2] Memory poison recovery in khugepaged collapsing Message-Id: <20230118152920.570334ca836e84a0dbf870be@linux-foundation.org> In-Reply-To: <20221205234059.42971-1-jiaqiyan@google.com> References: <20221205234059.42971-1-jiaqiyan@google.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: czaddq4ukpaxaxufospq7w7g1wewdmoi X-Rspam-User: X-Rspamd-Queue-Id: E46544000D X-Rspamd-Server: rspam06 X-HE-Tag: 1674084564-22575 X-HE-Meta: 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 1eg4Zkuz xwIMBHIefBIfWY8GwggqDEDVRmO06nSxcyI1dhLxMGcMVJkWTLiqmE/TnqQuOJvt0O5O5K1mOiX5orCo= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, 5 Dec 2022 15:40:57 -0800 Jiaqi Yan wrote: > Problem > ======= > Memory DIMMs are subject to multi-bit flips, i.e. memory errors. > As memory size and density increase, the chances of and number of > memory errors increase. The increasing size and density of server > RAM in the data center and cloud have shown increased uncorrectable > memory errors. There are already mechanisms in the kernel to recover > from uncorrectable memory errors. This series of patches provides > the recovery mechanism for the particular kernel agent khugepaged > when it collapses memory pages. Could we please have some reviewer input on this series? Thanks.