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From: David Marchand <david.marchand@redhat.com>
To: Nithin Dabilpuram <ndabilpuram@marvell.com>
Cc: "Burakov, Anatoly" <anatoly.burakov@intel.com>,
	David Christensen <drc@linux.vnet.ibm.com>,
	 Jerin Jacob Kollanukkaran <jerinj@marvell.com>,
	dev <dev@dpdk.org>, dpdk stable <stable@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v8 1/3] vfio: revert changes for map contiguous areas in one go
Date: Fri, 5 Mar 2021 08:50:28 +0100
Message-ID: <CAJFAV8zq13bSLUMKAg7FmD9i2qHBJNrMsnpPZff-d-Q6s67cBw@mail.gmail.com> (raw)
In-Reply-To: <20210115073243.7025-2-ndabilpuram@marvell.com>

On Fri, Jan 15, 2021 at 8:33 AM Nithin Dabilpuram
<ndabilpuram@marvell.com> wrote:
>
> In order to save DMA entries limited by kernel both for externel
> memory and hugepage memory, an attempt was made to map physically
> contiguous memory in one go. This cannot be done as VFIO IOMMU type1
> does not support partially unmapping a previously mapped memory
> region while Heap can request for multi page mapping and
> partial unmapping.
> Hence for going back to old method of mapping/unmapping at
> memseg granularity, this commit reverts
> commit d1c7c0cdf7ba ("vfio: map contiguous areas in one go")
>
> Also add documentation on what module parameter needs to be used
> to increase the per-container dma map limit for VFIO.
>
> Fixes: d1c7c0cdf7ba ("vfio: map contiguous areas in one go")
> Cc: anatoly.burakov@intel.com
> Cc: stable@dpdk.org
>
> Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
> Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
> Acked-by: David Christensen <drc@linux.vnet.ibm.com>

There is a regression reported in bz: https://bugs.dpdk.org/show_bug.cgi?id=649

I assigned it to Anatoly for now.
Nithin, can you have a loo too?

Thanks.


-- 
David Marchand


  reply	other threads:[~2021-03-05  7:50 UTC|newest]

Thread overview: 81+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-12  8:11 [dpdk-dev] [PATCH 0/2] fix issue with partial DMA unmap Nithin Dabilpuram
2020-10-12  8:11 ` [dpdk-dev] [PATCH 1/2] test: add test case to validate VFIO DMA map/unmap Nithin Dabilpuram
2020-10-14 14:39   ` Burakov, Anatoly
2020-10-15  9:54     ` [dpdk-dev] [EXT] " Nithin Dabilpuram
2020-10-12  8:11 ` [dpdk-dev] [PATCH 2/2] vfio: fix partial DMA unmapping for VFIO type1 Nithin Dabilpuram
2020-10-14 15:07   ` Burakov, Anatoly
2020-10-15  6:09     ` [dpdk-dev] [EXT] " Nithin Dabilpuram
2020-10-15 10:00       ` Burakov, Anatoly
2020-10-15 11:38         ` Nithin Dabilpuram
2020-10-15 11:50         ` Nithin Dabilpuram
2020-10-15 11:57         ` Nithin Dabilpuram
2020-10-15 15:10           ` Burakov, Anatoly
2020-10-16  7:10             ` Nithin Dabilpuram
2020-10-17 16:14               ` Burakov, Anatoly
2020-10-19  9:43                 ` Nithin Dabilpuram
2020-10-22 12:13                   ` Nithin Dabilpuram
2020-10-28 13:04                     ` Burakov, Anatoly
2020-10-28 14:17                       ` Nithin Dabilpuram
2020-10-28 16:07                         ` Burakov, Anatoly
2020-10-28 16:31                           ` Nithin Dabilpuram
2020-11-05  9:04 ` [dpdk-dev] [PATCH v2 0/3] fix issue with partial DMA unmap Nithin Dabilpuram
2020-11-05  9:04   ` [dpdk-dev] [PATCH v2 1/3] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2020-11-05  9:04   ` [dpdk-dev] [PATCH v2 2/3] vfio: fix DMA mapping granularity for type1 iova as va Nithin Dabilpuram
2020-11-10 14:04     ` Burakov, Anatoly
2020-11-10 14:22       ` Burakov, Anatoly
2020-11-10 14:17     ` Burakov, Anatoly
2020-11-11  5:08       ` Nithin Dabilpuram
2020-11-11 10:00         ` Burakov, Anatoly
2020-11-05  9:04   ` [dpdk-dev] [PATCH v2 3/3] test: add test case to validate VFIO DMA map/unmap Nithin Dabilpuram
2020-12-01 19:32 ` [dpdk-dev] [PATCH v3 0/4] fix issue with partial DMA unmap Nithin Dabilpuram
2020-12-01 19:32   ` [dpdk-dev] [PATCH v3 1/4] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2020-12-01 19:33   ` [dpdk-dev] [PATCH v3 2/4] vfio: fix DMA mapping granularity for type1 IOVA as VA Nithin Dabilpuram
2020-12-01 19:33   ` [dpdk-dev] [PATCH v3 3/4] test: add test case to validate VFIO DMA map/unmap Nithin Dabilpuram
2020-12-01 19:33   ` [dpdk-dev] [PATCH v3 4/4] test: change external memory test to use system page sz Nithin Dabilpuram
2020-12-01 23:23     ` David Christensen
2020-12-02  5:40       ` Nithin Dabilpuram
2020-12-02  5:46 ` [dpdk-dev] [PATCH v4 0/4] fix issue with partial DMA unmap Nithin Dabilpuram
2020-12-02  5:46   ` [dpdk-dev] [PATCH v4 1/4] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2020-12-02 18:36     ` David Christensen
2020-12-02  5:46   ` [dpdk-dev] [PATCH v4 2/4] vfio: fix DMA mapping granularity for type1 IOVA as VA Nithin Dabilpuram
2020-12-02 18:38     ` David Christensen
2020-12-02  5:46   ` [dpdk-dev] [PATCH v4 3/4] test: add test case to validate VFIO DMA map/unmap Nithin Dabilpuram
2020-12-02 19:23     ` David Christensen
2020-12-03  7:14       ` Nithin Dabilpuram
2020-12-14  8:24         ` Nithin Dabilpuram
2020-12-02  5:46   ` [dpdk-dev] [PATCH v4 4/4] test: change external memory test to use system page sz Nithin Dabilpuram
2020-12-14  8:19 ` [dpdk-dev] [PATCH v5 0/4] fix issue with partial DMA unmap Nithin Dabilpuram
2020-12-14  8:19   ` [dpdk-dev] [PATCH v5 1/4] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2020-12-14  8:19   ` [dpdk-dev] [PATCH v5 2/4] vfio: fix DMA mapping granularity for type1 IOVA as VA Nithin Dabilpuram
2020-12-14  8:19   ` [dpdk-dev] [PATCH v5 3/4] test: add test case to validate VFIO DMA map/unmap Nithin Dabilpuram
2020-12-14  8:19   ` [dpdk-dev] [PATCH v5 4/4] test: change external memory test to use system page sz Nithin Dabilpuram
2020-12-17 19:06 ` [dpdk-dev] [PATCH v6 0/4] fix issue with partial DMA unmap Nithin Dabilpuram
2020-12-17 19:06   ` [dpdk-dev] [PATCH v6 1/4] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2020-12-17 19:06   ` [dpdk-dev] [PATCH v6 2/4] vfio: fix DMA mapping granularity for type1 IOVA as VA Nithin Dabilpuram
2020-12-17 19:06   ` [dpdk-dev] [PATCH v6 3/4] test: add test case to validate VFIO DMA map/unmap Nithin Dabilpuram
2020-12-17 19:10     ` Nithin Dabilpuram
2021-01-05 19:33       ` David Christensen
2021-01-06  8:40         ` Nithin Dabilpuram
2021-01-06 21:20           ` David Christensen
2020-12-17 19:06   ` [dpdk-dev] [PATCH v6 4/4] test: change external memory test to use system page sz Nithin Dabilpuram
2020-12-23  5:13   ` [dpdk-dev] [PATCH v6 0/4] fix issue with partial DMA unmap Nithin Dabilpuram
2021-01-04 22:29     ` David Christensen
2021-01-12 17:39 ` [dpdk-dev] [PATCH v7 0/3] " Nithin Dabilpuram
2021-01-12 17:39   ` [dpdk-dev] [PATCH v7 1/3] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2021-01-12 17:39   ` [dpdk-dev] [PATCH v7 2/3] vfio: fix DMA mapping granularity for type1 IOVA as VA Nithin Dabilpuram
2021-01-12 17:39   ` [dpdk-dev] [PATCH v7 3/3] test: change external memory test to use system page sz Nithin Dabilpuram
2021-01-14 16:30     ` David Marchand
2021-01-15  6:57       ` Nithin Dabilpuram
2021-01-15  7:32 ` [dpdk-dev] [PATCH v8 0/3] fix issue with partial DMA unmap Nithin Dabilpuram
2021-01-15  7:32   ` [dpdk-dev] [PATCH v8 1/3] vfio: revert changes for map contiguous areas in one go Nithin Dabilpuram
2021-03-05  7:50     ` David Marchand [this message]
2021-03-05 13:54       ` Burakov, Anatoly
2021-03-05 15:50         ` Nithin Dabilpuram
2021-04-01 11:27           ` Burakov, Anatoly
2021-01-15  7:32   ` [dpdk-dev] [PATCH v8 2/3] vfio: fix DMA mapping granularity for type1 IOVA as VA Nithin Dabilpuram
2021-01-15  7:32   ` [dpdk-dev] [PATCH v8 3/3] test: change external memory test to use system page sz Nithin Dabilpuram
2021-02-11 11:21     ` Burakov, Anatoly
2021-02-16 13:14   ` [dpdk-dev] [PATCH v8 0/3] fix issue with partial DMA unmap Burakov, Anatoly
2021-02-22  9:41     ` Nithin Dabilpuram
2021-02-22 10:06       ` David Marchand
2021-03-01 12:13   ` David Marchand

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