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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 645D0D374A0 for ; Thu, 17 Oct 2024 14:19:06 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 052826B0099; Thu, 17 Oct 2024 10:19:06 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id F1DD86B009A; Thu, 17 Oct 2024 10:19:05 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id DBEBB6B009C; Thu, 17 Oct 2024 10:19:05 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id BA7066B0099 for ; Thu, 17 Oct 2024 10:19:05 -0400 (EDT) Received: from smtpin04.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay08.hostedemail.com (Postfix) with ESMTP id 1DBC11414B0 for ; Thu, 17 Oct 2024 14:18:54 +0000 (UTC) X-FDA: 82683300882.04.68EB21F Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf17.hostedemail.com (Postfix) with ESMTP id 528E540008 for ; Thu, 17 Oct 2024 14:18:55 +0000 (UTC) Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=tvv6Ppsr; spf=none (imf17.hostedemail.com: domain of BATV+8fef01ffec99140bf63f+7725+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+8fef01ffec99140bf63f+7725+infradead.org+hch@bombadil.srs.infradead.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1729174669; a=rsa-sha256; cv=none; b=IFZioMRM8Qwue2b9k40YUrL/NA0HhmCAuEjsRPr3XPLx1c8GGu5mxHdlq+NHSl6zFOOhry XQfofiE3dRq78rK0wlC8Hhpz1BJnoToRHb1oh/bItgeZqqfE6zqShG6ECw6Rm8VmN+B1/v JcAqvcI5oclC2eYl8FZSmtNfelMoMgo= ARC-Authentication-Results: i=1; imf17.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=tvv6Ppsr; spf=none (imf17.hostedemail.com: domain of BATV+8fef01ffec99140bf63f+7725+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+8fef01ffec99140bf63f+7725+infradead.org+hch@bombadil.srs.infradead.org; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1729174669; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=VUpe5RP1fWYLGbbUSAQN8Sy0lKKV6KEg6Paot5a6ppc=; b=HyF5Otopul2xanmqRZp9V/AjXW9Nxrsds5XxmTwXbcYpz+D4Gj7bqZaL4A99mTKLDCr7Cl TEK7bCoeZ6VXBMFYmqkeNnS6UUWoj5kh5ndhv2bGtCtY+PkxhsJaY5dfNjYcopdKHi1JXC ln9EKvikA+NdmJV+4LzPkLWdV0VQIPo= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=VUpe5RP1fWYLGbbUSAQN8Sy0lKKV6KEg6Paot5a6ppc=; b=tvv6Ppsr9GSJLGFeYRLEOIeL2f dbWejfWHj9+awYPTEEkcbJ/9wo3+V9QROWHYLRcZzBxls8PC3PlGSr2pT63t34XiV0KP46cJv17Kb 88DkrhJ8kbdE5E1uTYcCl+B+P5HilAif1ZISvdEycKL6e450KWT15Euw1mQVCGDyE79KNqNONym7Q M+cQHEJSI67H6VJVLNojN+J6ML358u48TJP+RzffmY06NWZ0rOtzfeXUklhIbXFH9bGsJ7ieJIVOZ CaUuqEeTBdfDzBBcO174ra/NCnU48aUl3NUjGIx0hnteK932Ga5F0Ku6FjbvJuV6kFiNblFagbMlY lC2v23Rw==; Received: from hch by bombadil.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1t1RLA-0000000F5Su-2wpy; Thu, 17 Oct 2024 14:19:00 +0000 Date: Thu, 17 Oct 2024 07:19:00 -0700 From: Christoph Hellwig To: Jason Gunthorpe Cc: Christoph Hellwig , Yonatan Maman , nouveau@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, linux-mm@kvack.org, herbst@redhat.com, lyude@redhat.com, dakr@redhat.com, airlied@gmail.com, simona@ffwll.ch, leon@kernel.org, jglisse@redhat.com, akpm@linux-foundation.org, dri-devel@lists.freedesktop.org, apopple@nvidia.com, bskeggs@nvidia.com, Gal Shalom Subject: Re: [PATCH v1 1/4] mm/hmm: HMM API for P2P DMA to device zone pages Message-ID: References: <20241016154428.GD4020792@ziepe.ca> <20241016174445.GF4020792@ziepe.ca> <20241017130539.GA897978@ziepe.ca> <20241017134644.GA948948@ziepe.ca> <20241017140507.GB948948@ziepe.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241017140507.GB948948@ziepe.ca> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Stat-Signature: jy7ckeaddhbidbr45rn56pxzjdf5o1g8 X-Rspamd-Queue-Id: 528E540008 X-Rspam-User: X-Rspamd-Server: rspam10 X-HE-Tag: 1729174735-292438 X-HE-Meta: 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 j3GWnLb/ w3OYtAS8BOgIk7C+8Sk9D2qOKjjpOY4j70+u5bkef9Ehc3rKjzo+xD5yQkBfFhOaNaXJLNYDZ4yV/bjef1ctUMW10DRlNZdHvWE5QruiVgAsVk+RTkDYSoC7f3pRMKlpt6ttHjWAj3RIQAAbJQJTlytON1NGCjauANeW7UKpDETvikiNCMxsem3FcFYDvvW+0pJ73z8DPn+/jOG08ZqwI2G0bZb20SATJXcSlMtVWSx0N42eFak974M5Enjyu1oY5jK5tID81zRFZOJ4byWpCKAr26Nmu/uTZEcOySMr59Wps6pVxKowKJBkapCdp+gGqM9FZHLMY04olzpLyLXsVNzAX/iX24m75OB3up23Rt9qnumCO5sUJCgJPNwZNvRDVGT+sricfo56jE8rqQaHmX4papTuld/pDwwz7Dp0TfRRo/CgkpZ2zYpDpvoB0Tcbw1aRM9G4pbArG4wX5Fo490MBR8BNxY/lWpa2K X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Oct 17, 2024 at 11:05:07AM -0300, Jason Gunthorpe wrote: > BTW this: > > iommu: generalize the batched sync after map interface > > I am hoping to in a direction of adding a gather to the map, just like > unmap. So eventually instead of open coding iotlb_sync_map() you'd > flush the gather and it would do it. I don't really care either way, I just need something to not regress map behavior vs map_sg.