From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 BF8B0307AEC; Wed, 15 Oct 2025 09:02:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760518960; cv=none; b=TK3TpYdsk+k2Py2HnIP7S0rlqYVB0F9jPxVEkebHhctr7sXLdMZSkZfXj7XEVtFLOh7KsoAT/B0bbDuNIzLYp9p+McRpMlh8Nh4Wp4JcMQtOAsJPw7R+WCRPD18w43sp58fxXEUtY6F8bZSK5sTIIsquNmeh6O3nZ2swFSZvmEE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760518960; c=relaxed/simple; bh=NnFyGjBoL4vGg7ADG2ActUbXLTE11O5QDFufreKmw1o=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=aknxa0lSCTZ6pqC/eFgF+hdHGx7U4grFbfhM8edp1r097Gm489JIKyiTHVpRiBvy856NmgL88MnEFLYmmrtZvNJ1lENdArEdcUTh1mgQwjWSSO2NgGArrwCRajbqv5rq+pM9WOa0dmh+vL3Q4mFFz+1gN8rF2bhGuvdqhElCncA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jGLnoEpN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="jGLnoEpN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 28134C4CEF8; Wed, 15 Oct 2025 09:02:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1760518960; bh=NnFyGjBoL4vGg7ADG2ActUbXLTE11O5QDFufreKmw1o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=jGLnoEpNwn1R41Qc3IIZWGmcD6MeEK4GVqMrDhSSc8fN7VJuVkNMDCZ6AQflu63GG UK0nFSVBkXOxB/KgPc2mfZ+1Pa47f9DwOlOxLuWdZ0cEnY5WCIqelN5Gbt4+TgnOKJ WKw11Oz6Xpru/Ylb9p+eAidWCosit/ZcLmNoa4aUvNQW4V75q42xXScHUgf2MFvkYl D08bz/w7rnbxImSwUzRViQB6J9yV8DznSHr0alrfz+/UDiJl9aEHUX9NyVORrhAI8d +q40uiiZceCBnd0y8AcQcgQB4GOeHjv2QUvMJzA8vWbPAsCqNpaJB0JUVBA9F8rXNI aAwTNFMgrDruQ== Date: Wed, 15 Oct 2025 12:02:31 +0300 From: Mike Rapoport To: David Hildenbrand Cc: Itamar Dalal , "linux-mm@kvack.org" , "linux-kselftest@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , "lorenzo.stoakes@oracle.com" , "riel@surriel.com" , "Liam.Howlett@oracle.com" , "vbabka@suse.cz" , "harry.yoo@oracle.com" , "jannh@google.com" , "surenb@google.com" , "mhocko@suse.com" , "shuah@kernel.org" Subject: Re: selftests/mm/rmap: verify correct RMAP handling of COW pages after fork() Message-ID: References: <8c2c9721-e2ca-488b-b7be-c58170f6ceba@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <8c2c9721-e2ca-488b-b7be-c58170f6ceba@redhat.com> On Wed, Oct 15, 2025 at 10:49:48AM +0200, David Hildenbrand wrote: > On 15.10.25 10:43, Itamar Dalal wrote: > > Add a new test `migrate.cow_after_fork` that verifies correct RMAP handling > > of Copy-On-Write (COW) pages after fork(). > > > > Before a write, the parent and child share the same PFN. After a write, the > > child’s PFN differs. This confirms that proper COW duplication occurred and > > that RMAP correctly tracks page ownership transitions during COW events. > > > > Signed-off-by: Itamar-Dalal > > --- > > Se my reply to your other patch. > > For the next time > > a) Use git-format-patch that will automatically add [PATCH] > > b) Use versioning, e.g., [PATCH v1], explain changes since the last version > under the "---" the > > c) Use RESEND for resends, e.g., [PATCH v1 RESEND] > > d) Use git-send-email to send mails out > > The b4 tool might help as well. And e) please don't respin new version as soon as you get a single feedback. https://docs.kernel.org/process/submitting-patches.html#don-t-get-discouraged-or-impatient -- Sincerely yours, Mike.