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 778B530F92B for ; Fri, 28 Nov 2025 11:46:03 +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=1764330363; cv=none; b=qU4C4onWSvP05BX20T9ZeYXcjdVZJPW496mxz6pqZfhpD5mjETKH5yU6NzdV6OKaET0nZuamw8ltW7rnVs8FVX4MQdXwCKVkPLuC2BjhuAXAb5U5dGmPlxwnAhmKkSs2SRvztcNHxHIjSP7TN9iDfKJwZ/JiD0FwK02X/I66CHg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764330363; c=relaxed/simple; bh=vqplphJ1VoiCvxNWL1YV3ef/8TrqVxQk35wf0M+dKpE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Pum7q9l4WaKfXG4b3HP3Vjfnd981eHBiY+2CjUA2CEU36sBrQyDKGGLGDoML/TDbNhcZbULp31ajin2qsLiEHXJeJ2rKs+78wT2w8J2IF5tk1dR9RK8C9gF0fwBMLChdlTB31eTDPkvJ4tQ+nR4sTd/hP338+kvdruK5THsQY9A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NCDlaJ1x; 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="NCDlaJ1x" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EC58BC4CEF1; Fri, 28 Nov 2025 11:46:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1764330363; bh=vqplphJ1VoiCvxNWL1YV3ef/8TrqVxQk35wf0M+dKpE=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=NCDlaJ1xHq7jQKrG9HYERIFWL4+6bYQzSi84yWcrHIc+mJJJwfcJjCbahGIOCLGJk N9MgQCYV0gXSUhrIFLGQlHDQ1U0Tex0R5nHiCBATbIIrAQMWe5E11T46cKFjg5O5V9 CG8+OGkEC9vfC8Ug9PP3vjliWkM2EKMR8SfSZ8g3P7TetdMKvCyR7Z0GM5i1ZvuPMC /vToiwFKxj/lbcrcxoXnI0JWsQPq3bAAJpmfH86B5oCm/O8ZEGMIRSK6pQ/KOKuWZ+ 65YuH9Bnu9x00I4PG7CLbXhODhUFczkS2h73y9msGtTGRSfiBfcv/4wf1e4K3UiZRg ho3SwP6DLzF4w== Message-ID: <89b5b9e7-d8c1-4402-9fe6-b312630b3d50@kernel.org> Date: Fri, 28 Nov 2025 12:45:58 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v1 0/2] powerpc/pseries/cmm: two smaller fixes To: "Ritesh Harjani (IBM)" , linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, Andrew Morton , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy References: <20251021100606.148294-1-david@redhat.com> <557b5500-412a-4d26-8c4b-147c9a00d5fd@kernel.org> <87zf86n3vq.ritesh.list@gmail.com> <3cc7d401-c77c-4ac8-abb8-c264fbd9aaf0@kernel.org> <87y0nqmwaz.ritesh.list@gmail.com> <189ac734-b194-4b52-9752-18d8c0b71377@kernel.org> <87tsyemocw.ritesh.list@gmail.com> From: "David Hildenbrand (Red Hat)" Content-Language: en-US In-Reply-To: <87tsyemocw.ritesh.list@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 11/28/25 11:40, Ritesh Harjani (IBM) wrote: > "David Hildenbrand (Red Hat)" writes: > >>>> >>>> Right. Let me give it a try first with pseries Qemu. Otherwise I have an >>>> access to pseries LPAR too. I can verify it there. >>> >>> Ah, now I realize my problem: I tried with Fedora 43 in a powerpc VM but >>> the modprobe didn't do anything. >>> >>> Looking again: >>> >>> # grep CONFIG_CMM /boot/config-6.17.1-300.fc43.ppc64le >>> CONFIG_CMM=y >>> >>> So modprob'ing won't do as the module is built in. >> >> Right, so doing "cmm.simulate=1" on the cmdline in a Fedora 43 VMs >> properly creates the CMM device. >> > > Right verifying using simulate mode is very straightforward. Thanks for that! > So.. using various random echo X > simulate_loan_target_kb on a VM... > > ~# cat /proc/vmstat |grep balloon > nr_balloon_pages 16 > balloon_inflate 1638 > balloon_deflate 1622 > balloon_migrate 4 Thanks a bunch for the review and testing! -- Cheers David