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Mon, 13 Jun 2022 21:36:10 -0700 (PDT) From: zhenwei pi To: akpm@linux-foundation.org, naoya.horiguchi@nec.com Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, david@redhat.com, linmiaohe@huawei.com, zhenwei pi Subject: [PATCH v4 0/2] mm/memory-failure: don't allow to unpoison hw corrupted page Date: Tue, 14 Jun 2022 12:38:28 +0800 Message-Id: <20220614043830.99607-1-pizhenwei@bytedance.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1655181373; a=rsa-sha256; cv=none; b=lKKLrwvjqg+0MMoJgLsDTFkrTu86PO2xYwSQALafoJbUnvZ1+YtvfuP66QopbrzGLbAIMc SKKr+I2aAwautbeT1YtLhgMSf4jnk8P9d+hIrKlB67F6WZ81iwY6EwmaEcaz3smxR91lgs 9w3UNXw5QAUWmMVdJoVHk+U86ACcYSs= ARC-Authentication-Results: i=1; imf29.hostedemail.com; dkim=pass header.d=bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b=YSlYb9Ta; spf=pass (imf29.hostedemail.com: domain of pizhenwei@bytedance.com designates 209.85.214.181 as permitted sender) smtp.mailfrom=pizhenwei@bytedance.com; dmarc=pass (policy=none) header.from=bytedance.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1655181373; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:references:dkim-signature; bh=4Z/iX7YmEjnq0jimjHRt+ZujFMeKDetwMwYzfGE9+NY=; b=Ut3GEjZ/NmTugDXwZmErpqKH1sfjKxJADcpnOv59crMrZPxAsc/buGRnufld+F+kLqP3M5 Ye4Sfh6orh0/Ddt0LO3SMsvO9axusbxkYDuoLx6DeXmVRGhEFaURSbWn+2uC6MauygcF7X /mI1cb2EDD4cV99ytBBhaGiQXXfddAw= X-Stat-Signature: cmc8k3me7cfjkwgnr6tdytw64mknpt69 X-Rspamd-Queue-Id: 881C1120088 Authentication-Results: imf29.hostedemail.com; dkim=pass header.d=bytedance-com.20210112.gappssmtp.com header.s=20210112 header.b=YSlYb9Ta; spf=pass (imf29.hostedemail.com: domain of pizhenwei@bytedance.com designates 209.85.214.181 as permitted sender) smtp.mailfrom=pizhenwei@bytedance.com; dmarc=pass (policy=none) header.from=bytedance.com X-Rspamd-Server: rspam07 X-Rspam-User: X-HE-Tag: 1655181372-593236 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000002, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: v3 -> v4: - Add debug entry "hwpoisoned-pages" to show the number of hwpoisoned pages. - Disable unpoison when a read HW memory failure occurs. v2 -> v3: - David pointed out that virt_to_kpte() is broken(no pmd_large() test on a PMD), so drop this API in this patch, walk kmap instead. v1 -> v2: - this change gets protected by mf_mutex - use -EOPNOTSUPP instead of -EPERM v1: - check KPTE to avoid to unpoison hardware corrupted page zhenwei pi (2): mm/memory-failure: introduce "hwpoisoned-pages" entry mm/memory-failure: disable unpoison once hw error happens Documentation/vm/hwpoison.rst | 7 ++++++- mm/hwpoison-inject.c | 25 ++++++++++++++++++++++++- mm/memory-failure.c | 1 + 3 files changed, 31 insertions(+), 2 deletions(-) -- 2.20.1