linux-kernel - Re: [PATCH 3/3] cnic,bnx2,bnx2x: use UIO_MEM_DMA

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Message-ID: <2023093003-city-pursuant-956e@gregkh>
Date:   Sat, 30 Sep 2023 20:29:59 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Jerry Snitselaar <jsnitsel@...hat.com>
Cc:     Chris Leech <cleech@...hat.com>, Christoph Hellwig <hch@....de>,
        Rasesh Mody <rmody@...vell.com>,
        Ariel Elior <aelior@...vell.com>,
        Sudarsana Kalluru <skalluru@...vell.com>,
        Manish Chopra <manishc@...vell.com>,
        Nilesh Javali <njavali@...vell.com>,
        Manish Rangankar <mrangankar@...vell.com>,
        John Meneghini <jmeneghi@...hat.com>,
        Lee Duncan <lduncan@...e.com>,
        Mike Christie <michael.christie@...cle.com>,
        Hannes Reinecke <hare@...nel.org>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] cnic,bnx2,bnx2x: use UIO_MEM_DMA_COHERENT

On Sat, Sep 30, 2023 at 02:10:50AM -0700, Jerry Snitselaar wrote:
> [1] https://github.com/open-iscsi/open-iscsi/blob/master/iscsiuio/README

That's IP offload, not what UIO is supposed to be for at all (yes, I
know DPDK abuses this api as well, and I hate it.)  But this is on a
network card, it shouldn't need UIO.  Why is iscsi somehow "special" for
this?

still confused,

greg k-h