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From: "Stojaczyk, Dariusz" <dariusz.stojaczyk@intel.com>
To: Thomas Monjalon <thomas@monjalon.net>,
	David Marchand <david.marchand@redhat.com>,
	"Burakov, Anatoly" <anatoly.burakov@intel.com>,
	"jerinj@marvell.com" <jerinj@marvell.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v4 0/4] Fixes on IOVA mode selection
Date: Tue, 23 Jul 2019 03:35:44 +0000
Message-ID: <FBE7E039FA50BF47A673AD0BD3CD56A8464BF4C9@HASMSX105.ger.corp.intel.com> (raw)
In-Reply-To: <1735440.496QTsyyT4@xps>

This introduces a regression where uio-bound devies are attached
to a DPDK app at runtime.

When there are no devices attached at initialization, the only safe
default should be RTE_IOVA_PA. With RTE_IOVA_VA we just
won't be able to do any DMA to uio-bound PCI devices. 

Can we revert this patch?

D.

> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Thomas Monjalon
> Sent: Monday, July 22, 2019 5:53 PM
> To: David Marchand <david.marchand@redhat.com>; Burakov, Anatoly
> <anatoly.burakov@intel.com>; jerinj@marvell.com
> Cc: dev@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH v4 0/4] Fixes on IOVA mode selection
> 
> 22/07/2019 14:56, David Marchand:
> > Following the issues reported by Jerin and the discussion that emerged
> > from it, here are fixes to restore and document the behavior of the EAL
> > and the pci bus driver.
> >
> > I pondered all the arguments and tried to have the less changes
> > possible.
> > I can't find a need for a flag to just announce support of physical
> > addresses from the pmd point of view.
> > So it ended up with something really close to what Jerin had suggested.
> >
> > But the problem is that this is still unfinished wrt the documentation.
> > I will be offline for 10 days and we need this to move forward, so
> > sending
> > anyway.
> >
> > Changelog since v3:
> > - fixed typos in patch 2,
> > - updated patch 3 title,
> > - moved and reworded comments in the note section in patch 4,
> >
> > Changelog since v2 (Jerin):
> > - Patch 2/4 - Remove personal appeals in log messages(Anatoly)
> > - Patch 4/4 - Added documentation (Anatoly)
> >
> > Changelog since v1 (Jerin):
> > - Changed RTE_PCI_DRV_IOVA_AS_VA flag name as
> RTE_PCI_DRV_NEED_IOVA_AS_VA
> >   (patch 3/4)
> > - Changed IOVA mode as VA for default case(patch 4/4) with
> documentation
> > - Tested the patch series on octeontx2 platform
> 
> Applied, thanks Jerin, Anatoly and David for converging
> on a documented solution together.
> 
> 


  reply index

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-10 21:48 [dpdk-dev] [PATCH 0/2] " David Marchand
2019-07-10 21:48 ` [dpdk-dev] [PATCH 1/2] Revert "bus/pci: add Mellanox kernel driver type" David Marchand
2019-07-16 10:37   ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-07-10 21:48 ` [dpdk-dev] [PATCH 2/2] eal: fix IOVA mode selection as VA for pci drivers David Marchand
2019-07-11 14:40   ` Thomas Monjalon
2019-07-12  8:05     ` Jerin Jacob Kollanukkaran
2019-07-12 11:03   ` Burakov, Anatoly
2019-07-12 12:43     ` Thomas Monjalon
2019-07-12 12:58       ` Burakov, Anatoly
2019-07-12 13:19         ` Bruce Richardson
2019-07-15 14:26       ` Jerin Jacob Kollanukkaran
2019-07-15 15:03         ` Thomas Monjalon
2019-07-15 15:35           ` Jerin Jacob Kollanukkaran
2019-07-15 16:06             ` Thomas Monjalon
2019-07-15 16:27               ` Jerin Jacob Kollanukkaran
2019-07-16 13:46 ` [dpdk-dev] [PATCH v2 0/4] Fixes on IOVA mode selection jerinj
2019-07-16 13:46   ` [dpdk-dev] [PATCH v2 1/4] Revert "bus/pci: add Mellanox kernel driver type" jerinj
2019-07-16 13:46   ` [dpdk-dev] [PATCH v2 2/4] eal: fix IOVA mode selection as VA for pci drivers jerinj
2019-07-16 14:26     ` Burakov, Anatoly
2019-07-16 15:07       ` Jerin Jacob Kollanukkaran
2019-07-16 13:46   ` [dpdk-dev] [PATCH v2 3/4] eal: change RTE_PCI_DRV_IOVA_AS_VA flag name jerinj
2019-07-16 13:46   ` [dpdk-dev] [PATCH v2 4/4] eal: select IOVA mode as VA for default case jerinj
2019-07-16 14:33     ` Burakov, Anatoly
2019-07-17  8:33       ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-07-17 12:38         ` Burakov, Anatoly
2019-07-17 14:04           ` Jerin Jacob Kollanukkaran
2019-07-18  6:45   ` [dpdk-dev] [PATCH v3 0/4] Fixes on IOVA mode selection jerinj
2019-07-18  6:45     ` [dpdk-dev] [PATCH v3 1/4] Revert "bus/pci: add Mellanox kernel driver type" jerinj
2019-07-18  6:45     ` [dpdk-dev] [PATCH v3 2/4] eal: fix IOVA mode selection as VA for pci drivers jerinj
2019-07-18  6:45     ` [dpdk-dev] [PATCH v3 3/4] eal: change RTE_PCI_DRV_IOVA_AS_VA flag name jerinj
2019-07-18  6:45     ` [dpdk-dev] [PATCH v3 4/4] eal: select IOVA mode as VA for default case jerinj
2019-07-22 11:28     ` [dpdk-dev] [PATCH v3 0/4] Fixes on IOVA mode selection David Marchand
2019-07-22 12:56 ` [dpdk-dev] [PATCH v4 " David Marchand
2019-07-22 12:56   ` [dpdk-dev] [PATCH v4 1/4] Revert "bus/pci: add Mellanox kernel driver type" David Marchand
2019-07-22 12:56   ` [dpdk-dev] [PATCH v4 2/4] eal: fix IOVA mode selection as VA for PCI drivers David Marchand
2019-11-25  9:33     ` Ferruh Yigit
2019-11-25 10:22       ` Thomas Monjalon
2019-11-25 12:03         ` Ferruh Yigit
2019-11-25 12:36           ` David Marchand
2019-11-25 12:58             ` Burakov, Anatoly
2019-11-25 14:29               ` Thomas Monjalon
2019-11-25 11:07       ` Jerin Jacob
2019-07-22 12:56   ` [dpdk-dev] [PATCH v4 3/4] drivers: change IOVA as VA PCI flag name David Marchand
2019-07-22 12:56   ` [dpdk-dev] [PATCH v4 4/4] eal: select IOVA as VA mode for default case David Marchand
2019-07-22 15:53   ` [dpdk-dev] [PATCH v4 0/4] Fixes on IOVA mode selection Thomas Monjalon
2019-07-23  3:35     ` Stojaczyk, Dariusz [this message]
2019-07-23  4:18       ` Jerin Jacob Kollanukkaran
2019-07-23  4:54         ` Stojaczyk, Dariusz
2019-07-23  5:27           ` Jerin Jacob Kollanukkaran
2019-07-23  7:21             ` Thomas Monjalon
2019-07-23  9:57             ` Burakov, Anatoly
2019-07-23 10:25               ` Thomas Monjalon
2019-07-23 13:56                 ` Burakov, Anatoly
2019-07-23 14:24                   ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-07-23 14:29                   ` [dpdk-dev] " Burakov, Anatoly
2019-07-23 14:36                     ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-07-23 15:47                       ` Burakov, Anatoly

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