From: Jason Gunthorpe <jgg@ziepe.ca>
To: Michal Kalderon <mkalderon@marvell.com>
Cc: Ariel Elior <aelior@marvell.com>,
"dledford@redhat.com" <dledford@redhat.com>,
"bmt@zurich.ibm.com" <bmt@zurich.ibm.com>,
"galpress@amazon.com" <galpress@amazon.com>,
"sleybo@amazon.com" <sleybo@amazon.com>,
"leon@kernel.org" <leon@kernel.org>,
"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>
Subject: Re: [PATCH v11 rdma-next 3/7] RDMA/efa: Use the common mmap_xa helpers
Date: Mon, 23 Sep 2019 10:28:15 -0300 [thread overview]
Message-ID: <20190923132815.GB12047@ziepe.ca> (raw)
In-Reply-To: <MN2PR18MB31823E8EADC7E27A12D09423A1850@MN2PR18MB3182.namprd18.prod.outlook.com>
On Mon, Sep 23, 2019 at 09:15:54AM +0000, Michal Kalderon wrote:
> > This hidden detail should also be noted in the comment for
> > rdma_user_mmap_io..
>
> I actually misunderstood you before and thought that we want to
> maintain all mappings in umap. Now I understand you meant only the
> io mappings, since they're not referenced counted by the mm system.
> I'll revert the changes and add an additional parameter to
> rdma_user_mmap_io -> However, this means more changes in drivers
> that call this function and don't use the mmap_xa, Should I add an
> additional interface ? or are you OK with me sending NULL to the
> additional parameter from all drivers using the interface ? (hns,
> mlx4, mlx5)
It should be OK
> Also, who should increase the refcnt of rdma_user_mmap_entry when it
> is set to the vma private data ? The caller of rdma_user_mmap_io or
> inside rdma_user_mmap_io function ? This will definitely simplify
> things.
I generally prefer to see refcounts incrd at the spot the pointer is
copied, so the thing that sets vm_prviate_data should incr the refcount.
Jason
next prev parent reply other threads:[~2019-09-23 13:28 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-05 10:01 [PATCH v11 rdma-next 0/7] RDMA/qedr: Use the doorbell overflow recovery mechanism for RDMA Michal Kalderon
2019-09-05 10:01 ` [PATCH v11 rdma-next 1/7] RDMA/core: Move core content from ib_uverbs to ib_core Michal Kalderon
2019-09-05 10:01 ` [PATCH v11 rdma-next 2/7] RDMA/core: Create mmap database and cookie helper functions Michal Kalderon
2019-09-19 17:14 ` Jason Gunthorpe
2019-09-19 17:48 ` Jason Gunthorpe
2019-09-19 18:07 ` Jason Gunthorpe
2019-09-23 9:36 ` [EXT] " Michal Kalderon
2019-09-23 13:30 ` Jason Gunthorpe
2019-09-24 8:31 ` Michal Kalderon
2019-09-24 12:37 ` Jason Gunthorpe
2019-09-05 10:01 ` [PATCH v11 rdma-next 3/7] RDMA/efa: Use the common mmap_xa helpers Michal Kalderon
2019-09-19 17:37 ` Jason Gunthorpe
2019-09-23 9:15 ` Michal Kalderon
2019-09-23 13:28 ` Jason Gunthorpe [this message]
2019-09-05 10:01 ` [PATCH v11 rdma-next 4/7] RDMA/siw: " Michal Kalderon
2019-09-05 10:01 ` [PATCH v11 rdma-next 5/7] RDMA/qedr: Use the common mmap API Michal Kalderon
2019-09-19 17:55 ` Jason Gunthorpe
2019-09-20 13:39 ` Gal Pressman
2019-09-23 9:21 ` Michal Kalderon
2019-09-23 13:29 ` Jason Gunthorpe
2019-09-24 8:25 ` [EXT] " Michal Kalderon
2019-09-24 8:49 ` Pressman, Gal
2019-09-24 9:31 ` Michal Kalderon
2019-10-20 7:19 ` Gal Pressman
2019-10-21 17:33 ` Jason Gunthorpe
2019-10-23 6:40 ` Gal Pressman
2019-10-23 14:41 ` Jason Gunthorpe
2019-10-24 8:06 ` Gal Pressman
2019-09-05 10:01 ` [PATCH v11 rdma-next 6/7] RDMA/qedr: Add doorbell overflow recovery support Michal Kalderon
2019-09-19 18:02 ` Jason Gunthorpe
2019-09-20 13:30 ` Gal Pressman
2019-09-20 13:38 ` Jason Gunthorpe
2019-09-20 14:00 ` Gal Pressman
2019-09-23 9:37 ` Michal Kalderon
2019-09-25 19:16 ` [EXT] " Michal Kalderon
2019-09-25 19:21 ` Jason Gunthorpe
2019-09-25 19:37 ` Michal Kalderon
2019-09-26 19:10 ` Jason Gunthorpe
2019-09-23 9:30 ` Michal Kalderon
2019-09-23 13:26 ` Jason Gunthorpe
2019-09-05 10:01 ` [PATCH v11 rdma-next 7/7] RDMA/qedr: Add iWARP doorbell " Michal Kalderon
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