From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Thomas Monjalon <thomas@monjalon.net>
Cc: david.marchand@redhat.com, ajit.khaparde@broadcom.com,
alejandro.lucero@netronome.com, anatoly.burakov@intel.com,
beilei.xing@intel.com, bruce.richardson@intel.com, dev@dpdk.org,
hyonkim@cisco.com, igor.russkikh@aquantia.com,
jerinj@marvell.com, jingjing.wu@intel.com,
john.mcnamara@intel.com, johndale@cisco.com,
kirankumark@marvell.com, konstantin.ananyev@intel.com,
marko.kovacevic@intel.com, matan@mellanox.com,
ndabilpuram@marvell.com, pavel.belous@aquantia.com,
qi.z.zhang@intel.com, qiming.yang@intel.com, rmody@marvell.com,
shahafs@mellanox.com, shshaikh@marvell.com,
somnath.kotur@broadcom.com, viacheslavo@mellanox.com,
wenzhuo.lu@intel.com, xiao.w.wang@intel.com, yskoh@mellanox.com
Subject: Re: [dpdk-dev] [PATCH v4 2/4] eal: fix IOVA mode selection as VA for PCI drivers
Date: Mon, 25 Nov 2019 12:03:44 +0000 [thread overview]
Message-ID: <7d735fc8-a80c-3517-8d8e-8eced554d13f@intel.com> (raw)
In-Reply-To: <9486799.kn5VEkfAUu@xps>
On 11/25/2019 10:22 AM, Thomas Monjalon wrote:
> 25/11/2019 10:33, Ferruh Yigit:
>> It looks like DPDK application initialized as IOVA=VA,
>> and the new device is bound to 'igb_uio' which forces it to PA,
>> fails on above check.
>
> Do you mean this use case was not tested earlier with DPDK 19.08?
Perhaps, just a guess, this can be side affect of only using LTS.
>
>
>> I would like to get your comment on the issue.
>>
>> For the OvS mode, hopefully binding the device to 'vfio-pci'
>> can be a solution, but for the cases we don't have that option,
>> can/should we force the DPDK to PA mode after initialization?
>
> I think this is expected, because VA is the new default since 19.08:
> http://doc.dpdk.org/guides/rel_notes/release_19_08.html#new-features
>
> In case, there is no constraint on initialization,
> we have to decide which mode is preferred.
> Previously PA was preferred.
> For the sake of modernity (and because it fits with some new devices),
> the preference has been changed to VA.
>
> If igb_uio device is used at initialization,
> the PA mode should be used.
> If igb_uio (PA-only) device is hotplugged, no luck!
> If VA-only device is hotplugged, it works!
>
> I think this change is one step in deprecating igb_uio.
>
I just want to confirm/clarify that this behavior change is by design, not a defect.
Should we document this behavior change more clearly, or highlight more, to not
let catch others too?
next prev parent reply other threads:[~2019-11-25 12:03 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-10 21:48 [dpdk-dev] [PATCH 0/2] Fixes on IOVA mode selection 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 [this message]
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
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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