From: Maor Gottlieb <maorg@nvidia.com>
To: Jason Gunthorpe <jgg@nvidia.com>,
Bob Pearson <rpearsonhpe@gmail.com>,
Leon Romanovsky <leonro@nvidia.com>,
Christoph Hellwig <hch@lst.de>
Cc: <linux-rdma@vger.kernel.org>
Subject: Re: dynamic-sg patch has broken rdma_rxe
Date: Thu, 15 Oct 2020 10:44:44 +0300 [thread overview]
Message-ID: <e2763434-2f4f-9971-ae9d-62bab62b2e93@nvidia.com> (raw)
In-Reply-To: <20201014225125.GC5316@nvidia.com>
On 10/15/2020 1:51 AM, Jason Gunthorpe wrote:
> On Tue, Oct 13, 2020 at 09:33:14AM -0500, Bob Pearson wrote:
>> Jason,
>>
>> Just pulled for-next and now hit the following warning.
>> Register user space memory is not longer working.
>> I am trying to debug this but if you have any idea where to look let me know.
> The offset_in_page is wrong, but it is protecting some other logic..
>
> Maor? Leon? Can you sort it out tomorrow?
Leon and I investigated it. This check existed before my series to
protect the alloc_table_from_pages logic. It's still relevant.
This patch that broke it: 54816d3e69d1 ("RDMA: Explicitly pass in the
dma_device to ib_register_device"), and according to below link it was
expected. The safest approach is to set the max_segment_size back the
2GB in all drivers. What do you think?
https://lore.kernel.org/linux-rdma/20200923072111.GA31828@infradead.org/
>
> Jason
next prev parent reply other threads:[~2020-10-15 7:44 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-13 14:33 dynamic-sg patch has broken rdma_rxe Bob Pearson
2020-10-13 16:34 ` Bob Pearson
2020-10-14 22:51 ` Jason Gunthorpe
2020-10-15 7:44 ` Maor Gottlieb [this message]
2020-10-15 11:23 ` Gal Pressman
2020-10-15 12:21 ` Maor Gottlieb
2020-10-16 0:31 ` Jason Gunthorpe
2020-10-16 7:13 ` Christoph Hellwig
[not found] ` <796ca31aed8f469c957cb850385b9d09@intel.com>
2020-10-16 11:58 ` Jason Gunthorpe
2020-10-19 9:50 ` Tvrtko Ursulin
2020-10-19 12:12 ` Jason Gunthorpe
2020-10-19 12:29 ` Tvrtko Ursulin
2020-10-19 12:48 ` Jason Gunthorpe
2020-10-20 11:37 ` Tvrtko Ursulin
2020-10-20 11:47 ` Jason Gunthorpe
2020-10-20 12:31 ` Tvrtko Ursulin
2020-10-20 12:56 ` Jason Gunthorpe
2020-10-20 13:09 ` Tvrtko Ursulin
2020-10-20 13:32 ` Jason Gunthorpe
2020-10-15 15:35 ` Bob Pearson
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