From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DB21EC5516F for ; Fri, 31 Jul 2026 18:11:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To: Content-Transfer-Encoding:Content-Type:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=qgKGyimHWHWrS7GKqRrXGIY74zPdoBJNUqsWVCUzh6o=; b=w030CulUZtCuKtwn3rF+UN9uQl hrIXeRVEwAOLQbLQBaCaKhFNomMZ7uc5NiRSkEXWkI2mm3+m78AZGVKxwRdZwolsu+HRnEcnQrl34 lrOph3sv5B16EFVPmW6t7laLGOy9xhGgMXKfOKZcAhLJnfW23htp07KVWdn6naY1/yihqMda8M/rV w866ZGdMyv6369brcfKdTZV3SQLKWLQDDpl1eNOQzbBT08TQVQtoxgQt1TGtS8y5xS7o6QvfyGfUe V7q91aWvf8bfrfNq/RfFZUdiOyITzjIRq2B4SfOIBLZy0gtFIuL8pLFR5d/uvzPHCrm+3wCxy4Fce Pidlo5Ww==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wprhn-0000000DKdQ-3Pun; Fri, 31 Jul 2026 18:11:35 +0000 Received: from stravinsky.debian.org ([2001:41b8:202:deb::311:108]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wprhk-0000000DKc8-04VH for kexec@lists.infradead.org; Fri, 31 Jul 2026 18:11:34 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debian.org; s=smtpauto.stravinsky; h=X-Debian-User:In-Reply-To:Content-Transfer-Encoding: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date: Reply-To:Content-ID:Content-Description; bh=qgKGyimHWHWrS7GKqRrXGIY74zPdoBJNUqsWVCUzh6o=; b=NpNsu0N7Nk2pB2+SdDRWLmEnhq d3V0f55YufscXQEl5pXVlXrTfe6VEv5enoXClU+UvZLUheXpGmD0icDh6+RDW+6brJmY0ykZN491y A1xHIWBiR1s1YFIYbocN/mYdIbECKTcNF0K/c4B7iVtFc3dauPPx6tHdq6bXLAK6kA1TlIljgzzkK ok49T3dq8jmWghghVW4C7/rKanX1I8nIEW4Qtj5xQXKPOzthngAqG9SnnflegVRWO1cyR+3NKVDXd u5H1EXCl1XIlFPTevZbJOftj4jCor++oYXF+qJLTcNlVhI2a1hSQKp/sYypSR7HMx8S5fOEvdcA5U qVi2hIlA==; Received: from authenticated-user by stravinsky.debian.org with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from ) id 1wprhK-00AD5R-2f; Fri, 31 Jul 2026 18:11:07 +0000 Date: Fri, 31 Jul 2026 11:11:01 -0700 From: Breno Leitao To: Pratyush Yadav Cc: Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Baoquan He , Pasha Tatashin , Miaohe Lin , Naoya Horiguchi , linux-mm@kvack.org, linux-kernel@vger.kernel.org, kexec@lists.infradead.org, rmikey@meta.com, riel@surriel.com, kernel-team@meta.com, Kiryl Shutsemau Subject: Re: [PATCH v2] kexec: keep the next kernel off hardware-poisoned pages Message-ID: References: <20260730-kexec_posioned-v2-1-f92d18551f64@debian.org> <2vxzecgj6od4.fsf@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <2vxzecgj6od4.fsf@kernel.org> X-Debian-User: leitao X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260731_111132_072438_AE5DA1D6 X-CRM114-Status: UNSURE ( 8.71 ) X-CRM114-Notice: Please train this message. X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org On Fri, Jul 31, 2026 at 07:49:27PM +0200, Pratyush Yadav wrote: > > + * return phys_addr_t, thus this "extra" parameter, instead of returning > > + * the hit. > > + */ > > +bool range_contains_hwpoison(phys_addr_t start, unsigned long size, > > + phys_addr_t *poison) > > Perhaps > > phys_addr_t range_last_hwpoison(phys_addr_t start, unsigned long size) ? > > And if no poisoned page lands here then a default of 0 or ~0UL? That was my initial preference, but hypothetically phys_addr_t 0 could be a poisoned page. I hadn't considered ~0UL as a sentinel — that should work and is a good suggestion. let me prototype. Thanks for the review. --breno