From: David Miller <davem@davemloft.net>
To: ilias.apalodimas@linaro.org
Cc: willy@infradead.org, brouer@redhat.com, tariqt@mellanox.com,
toke@redhat.com, netdev@vger.kernel.org,
mgorman@techsingularity.net, linux-mm@kvack.org
Subject: Re: [RFC, PATCH] net: page_pool: Don't use page->private to store dma_addr_t
Date: Thu, 07 Feb 2019 13:25:19 -0800 (PST) [thread overview]
Message-ID: <20190207.132519.1698007650891404763.davem@davemloft.net> (raw)
In-Reply-To: <20190207152034.GA3295@apalos>
From: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Date: Thu, 7 Feb 2019 17:20:34 +0200
> Well updating struct page is the final goal, hence the comment. I am mostly
> looking for opinions here since we are trying to store dma addresses which are
> irrelevant to pages. Having dma_addr_t definitions in mm-related headers is a
> bit controversial isn't it ? If we can add that, then yes the code would look
> better
I fundamentally disagree.
One of the core operations performed on a page is mapping it so that a device
and use it.
Why have ancillary data structure support for this all over the place, rather
than in the common spot which is the page.
A page really is not just a 'mm' structure, it is a system structure.
next prev parent reply other threads:[~2019-02-07 21:25 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-07 14:36 [RFC, PATCH] net: page_pool: Don't use page->private to store dma_addr_t Ilias Apalodimas
2019-02-07 15:07 ` Matthew Wilcox
2019-02-07 15:20 ` Ilias Apalodimas
2019-02-07 21:25 ` David Miller [this message]
2019-02-07 21:34 ` Matthew Wilcox
2019-02-07 21:42 ` Ilias Apalodimas
2019-02-11 8:53 ` Tariq Toukan
2019-02-11 12:12 ` Matthew Wilcox
2019-02-11 15:38 ` Tariq Toukan
2019-02-11 17:14 ` Eric Dumazet
2019-02-12 12:39 ` Tariq Toukan
2019-02-12 13:49 ` Jesper Dangaard Brouer
2019-02-12 14:58 ` Tariq Toukan
2019-02-12 15:15 ` Eric Dumazet
2019-02-12 18:13 ` Alexander Duyck
2019-02-12 18:20 ` Ilias Apalodimas
2019-02-13 8:50 ` Tariq Toukan
2019-02-13 8:46 ` Tariq Toukan
2019-02-07 21:37 ` Ilias Apalodimas
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