From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 70C1F53D0DB; Tue, 22 Sep 2026 11:59:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790078351; cv=none; b=WAZ1QFqW9F3cvDiEg7kjwJmzqNAC2RKsoWINALLBVkbtkz9wB//gexibeIx0xOX1H1FN7rk3aJ8gcsw9lvZT5655X1w1YcD2KQhkaHyfYvzhLoFAYTdMeVeS5RXyKLqMTHZM/xp+NCEYb3lUzamr1SAVLsf2rMMGCDWUTkiYpek= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790078351; c=relaxed/simple; bh=4+z6JheyaIK1PdzOeYPbOgPfQt/6lcU6+M8SiblnRv8=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=Ud285nS6yks1SLAtqYuSel2OGviB3Uiums5k4AKR1lykHZiUDEzFc4U8FukCPYMBkMTIw//3wOvYqnL2KfUAoW1xhmTgnIimiaPFqCf8OaB6e00SV2NEGHkgYNEb2PzUVv/Tf/8ii5LRUo9deE1w7irvwojB4aNXSCRdZ8lbeU8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XsS7whYV; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XsS7whYV" 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) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain 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