From: Jason Gunthorpe <jgg@ziepe.ca>
To: Jacob Moroni <jmoroni@google.com>
Cc: Leon Romanovsky <leon@kernel.org>,
tatyana.e.nikolova@intel.com, linux-rdma@vger.kernel.org
Subject: Re: [PATCH rdma-next] RDMA/irdma: Check MR contiguity before PBLE alloc
Date: Tue, 13 Oct 2026 13:29:47 -0300 [thread overview]
Message-ID: <20261013162947.GM14213@ziepe.ca> (raw)
In-Reply-To: <CAHYDg1ReKsz_RNB_k3nc+qDu2vjGz+OQfNQhthNzW7TvGMLc6Q@mail.gmail.com>
On Tue, Oct 13, 2026 at 12:08:54PM -0400, Jacob Moroni wrote:
> Okay, I will respin to skip the best_pgsz call. I should have it out soon.
>
> Just to run this by you: The HW still requires a page size in contiguous mode
> and expects the DMA address to be aligned to that size. So, I'll use SZ_4K which
> should be safe in all cases and then ALIGN_DOWN the value of
> ib_umem_start_dma_addr().
That should be OK, it has a way to disable any unalignement right?
MR IOVA does not have to be page aligned, but the HW has to provide
security.
Jason
prev parent reply other threads:[~2026-10-13 16:29 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-10 19:48 [PATCH rdma-next] RDMA/irdma: Check MR contiguity before PBLE alloc Jacob Moroni
2026-10-10 19:57 ` sashiko-bot
2026-10-12 14:00 ` Leon Romanovsky
2026-10-12 18:50 ` Jason Gunthorpe
2026-10-13 11:22 ` Leon Romanovsky
2026-10-13 16:08 ` Jacob Moroni
2026-10-13 16:29 ` Jason Gunthorpe [this message]
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