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 265FDC982FA for ; Tue, 22 Sep 2026 11:59:13 +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:Content-Type:MIME-Version: Message-ID:Date:References:In-Reply-To:Subject:Cc:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=HWV8VPdptiBeMeQOpQB0KZQcSjJ+YKNTLPJopvTQN40=; b=YG8qF4cAMTmq7ydU3zUuVGrR15 s4HyR3ggt4eQJ4zytRANm0VWYiubf/BUyGF4PE70hfGRjfgtNoUL3keHQMdXGM4XJ6Bcu8M58Vn4S QLGSvLd5iZbuxY/G/PbYIkoOlrWaE6rToutuEQAIwRjIskyPicu7nY8QhVCyEKaACftMVP1Cg7avh 1DJkf7N/UrQp4oD1+2LNjPl4grsRoiKXyqyIp/b0YlrVBly2oxXJPOQrgBun3iTiJIaIAkwhTP8s+ SSTIg/MGfZJjhQbVOOdXU1zAVPnZwoUYW7MwbESNscNezk9fD8cDMKowfbWvq0xk38RkLwBHYP5e1 mugyIGkA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8z9T-00000005FtA-2Vec; Tue, 22 Sep 2026 11:59:11 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x8z9T-00000005Ft2-18Gp for kexec@lists.infradead.org; Tue, 22 Sep 2026 11:59:11 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 5B5EF601F7; Tue, 22 Sep 2026 11:59:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 113A61F000FF; Tue, 22 Sep 2026 11:59:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790078350; bh=HWV8VPdptiBeMeQOpQB0KZQcSjJ+YKNTLPJopvTQN40=; h=From:To:Cc:Subject:In-Reply-To:References:Date; b=XsS7whYVEozZ3YLFpFFcGaoNfReDX1brkr/7JIBgcT0QIQ8ij5zLiLdifdCqZWgx9 +fRa5XDq62q/SW15wAwOBYAjGhvbHfwQywREwed5Sx+kvac45jdB2kxHFIR7JxfzXT tOa9/Y/Nw4WNsnLHtfUUyu4pWxuosDRINvT50+v+EqY6h4R1x5iSxvhJ0khYZYnzSU fLrkjRkXjLQrWAhCjcgzP2Xmv/NGzCLbCPLwPACHv1zadE8qCjp6ZbkT6HUOGe25JX b6PPS1W3jk3LcbB/DzpTTQCjW60A8LKchRQoqL0NaHEf92rwUVU+3ciJu8lwYibVn/ VxqFN7FHjwnfQ== From: Pratyush Yadav To: Tal Zussman Cc: Andrew Morton , Baoquan He , Mike Rapoport , Pasha Tatashin , Pratyush Yadav , Dave Young , linux-mm@kvack.org, linux-s390@vger.kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: [PATCH] vmcore: convert mmap_vmcore_fault() to use folios In-Reply-To: <20260915-vmcore-fault-folio-v1-1-a0cb6278670f@columbia.edu> (Tal Zussman's message of "Tue, 15 Sep 2026 19:42:15 -0400") References: <20260915-vmcore-fault-folio-v1-1-a0cb6278670f@columbia.edu> Date: Tue, 22 Sep 2026 13:59:06 +0200 Message-ID: <2vxzh5jh5wfp.fsf@kernel.org> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain 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 Tue, Sep 15 2026, Tal Zussman wrote: > Use a folio for the page cache page the s390 fault handler reads the > old kernel's memory into. This removes four compound_head() calls and > one of the last callers of find_or_create_page(). > > The vmcore mapping only has order-0 folios, so the logic is unchanged. > > Compile tested for s390. > > Signed-off-by: Tal Zussman Acked-by: Pratyush Yadav [...] -- Regards, Pratyush Yadav