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Thu, 06 Feb 2025 13:11:05 -0500 X-MC-Unique: 8E3rdXJoPkCOp7n7f2PNnw-1 X-Mimecast-MFC-AGG-ID: 8E3rdXJoPkCOp7n7f2PNnw Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 8B6E61955BC0; Thu, 6 Feb 2025 18:10:26 +0000 (UTC) Received: from localhost (unknown [10.2.16.145]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id EA005180087A; Thu, 6 Feb 2025 18:10:21 +0000 (UTC) Date: Thu, 6 Feb 2025 13:10:19 -0500 From: Stefan Hajnoczi To: Albert Esteve Cc: Vivek Goyal , Dan Williams , Alistair Popple , akpm@linux-foundation.org, linux-mm@kvack.org, alison.schofield@intel.com, lina@asahilina.net, zhang.lyra@gmail.com, gerald.schaefer@linux.ibm.com, vishal.l.verma@intel.com, dave.jiang@intel.com, logang@deltatee.com, bhelgaas@google.com, jack@suse.cz, jgg@ziepe.ca, catalin.marinas@arm.com, will@kernel.org, mpe@ellerman.id.au, npiggin@gmail.com, dave.hansen@linux.intel.com, ira.weiny@intel.com, willy@infradead.org, djwong@kernel.org, tytso@mit.edu, linmiaohe@huawei.com, david@redhat.com, peterx@redhat.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, nvdimm@lists.linux.dev, linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, jhubbard@nvidia.com, hch@lst.de, david@fromorbit.com, chenhuacai@kernel.org, kernel@xen0n.name, loongarch@lists.linux.dev, Hanna Czenczek , German Maglione Subject: Re: [PATCH v6 01/26] fuse: Fix dax truncate/punch_hole fault path Message-ID: <20250206181019.GA413673@fedora> References: <67a3fde7da328_2d2c2942b@dwillia2-xfh.jf.intel.com.notmuch> <20250206143032.GA400591@fedora> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="9gaKO0MQEl4+jp8i" Content-Disposition: inline In-Reply-To: X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 --9gaKO0MQEl4+jp8i Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Feb 06, 2025 at 03:59:03PM +0100, Albert Esteve wrote: > Hi! >=20 > On Thu, Feb 6, 2025 at 3:30=E2=80=AFPM Stefan Hajnoczi wrote: > > > > On Thu, Feb 06, 2025 at 08:37:07AM -0500, Vivek Goyal wrote: > > > And then there are challenges at QEMU level. virtiofsd needs addition= al > > > vhost-user commands to implement DAX and these never went upstream in > > > QEMU. I hope these challenges are sorted at some point of time. > > > > Albert Esteve has been working on QEMU support: > > https://lore.kernel.org/qemu-devel/20240912145335.129447-1-aesteve@redh= at.com/ > > > > He has a viable solution. I think the remaining issue is how to best > > structure the memory regions. The reason for slow progress is not > > because it can't be done, it's probably just because this is a > > background task. >=20 > It is partially that, indeed. But what has me blocked for now on posting = the > next version is that I was reworking a bit the MMAP strategy. > Following David comments, I am relying more on RAMBlocks and > subregions for mmaps. But this turned out more difficult than anticipated. >=20 > I hope I can make it work this month and then post the next version. > If there are no major blockers/reworks, further iterations on the > patch shall go smoother. >=20 > I have a separate patch for the vhost-user spec which could > iterate faster, if that'd help. Let's see if anyone needs the vhost-user spec extension now. Otherwise it seems fine to merge it together with the implementation of that spec. Stefan --9gaKO0MQEl4+jp8i Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhpWov9P5fNqsNXdanKSrs4Grc8gFAmek+wsACgkQnKSrs4Gr c8iv1AgAtw36d3ZukmPTk9VmX0NGRgWskCoroH9Kztfi3UeYUTi5bn/AL9yD+73x aQ8w4QvmQQBq/U85J8DNgOJ6hXW4uE2XpHCEtdgVWRFatuEwWtlLNZ46gUMD+AJb QtUvCLNwOtMYbADhEDUiIDIZS3DxHUvTI8JZWN6tNCFme7tuoUiJ4hWEhHhQ07yS yebWMNRoW2UmDtVWBMsp/v7zhoroqrrIcRvAaLUBTIE/k2myl3zxEPRW7j69jl9S 7XwGGLC9Odz8ssha4UIg5fbwuUqpbJQA/PwPQVeJWR0a4OXhbFWebWEGdrXiTKP4 04dxu53buvDo8JePVLkCaQZfazl9Cg== =cm2Y -----END PGP SIGNATURE----- --9gaKO0MQEl4+jp8i--