From: Shakeel Butt <shakeelb@google.com>
To: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: Matthew Wilcox <willy@infradead.org>,
Matteo Croce <mcroce@linux.microsoft.com>,
netdev <netdev@vger.kernel.org>, Linux MM <linux-mm@kvack.org>,
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Subject: Re: [PATCH net-next v3 2/5] mm: add a signature in struct page
Date: Sat, 10 Apr 2021 10:42:30 -0700 [thread overview]
Message-ID: <CALvZod7UUxTavexGCzbKaK41LAW7mkfQrnDhFbjo-KvH9P6KsQ@mail.gmail.com> (raw)
In-Reply-To: <YHHPbQm2pn2ysth0@enceladus>
On Sat, Apr 10, 2021 at 9:16 AM Ilias Apalodimas
<ilias.apalodimas@linaro.org> wrote:
>
> Hi Matthew
>
> On Sat, Apr 10, 2021 at 04:48:24PM +0100, Matthew Wilcox wrote:
> > On Sat, Apr 10, 2021 at 12:37:58AM +0200, Matteo Croce wrote:
> > > This is needed by the page_pool to avoid recycling a page not allocated
> > > via page_pool.
> >
> > Is the PageType mechanism more appropriate to your needs? It wouldn't
> > be if you use page->_mapcount (ie mapping it to userspace).
>
> Interesting!
> Please keep in mind this was written ~2018 and was stale on my branches for
> quite some time. So back then I did try to use PageType, but had not free
> bits. Looking at it again though, it's cleaned up. So yes I think this can
> be much much cleaner. Should we go and define a new PG_pagepool?
>
>
Can this page_pool be used for TCP RX zerocopy? If yes then PageType
can not be used.
There is a recent discussion [1] on memcg accounting of TCP RX
zerocopy and I am wondering if this work can somehow help in that
regard. I will take a look at the series.
[1] https://lore.kernel.org/linux-mm/20210316013003.25271-1-arjunroy.kdev@gmail.com/
next prev parent reply other threads:[~2021-04-10 17:43 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-09 22:37 [PATCH net-next v3 0/5] page_pool: recycle buffers Matteo Croce
2021-04-09 22:37 ` [PATCH net-next v3 1/5] xdp: reduce size of struct xdp_mem_info Matteo Croce
2021-04-09 22:37 ` [PATCH net-next v3 2/5] mm: add a signature in struct page Matteo Croce
2021-04-10 15:48 ` Matthew Wilcox
2021-04-10 16:16 ` Ilias Apalodimas
2021-04-10 17:42 ` Shakeel Butt [this message]
2021-04-10 18:27 ` Ilias Apalodimas
2021-04-10 19:39 ` Matthew Wilcox
2021-04-11 10:05 ` Jesper Dangaard Brouer
2021-04-14 19:41 ` Jesper Dangaard Brouer
2021-04-14 20:09 ` Shakeel Butt
2021-04-14 20:51 ` Eric Dumazet
2021-04-19 5:12 ` Ilias Apalodimas
2021-04-19 14:57 ` Shakeel Butt
2021-04-19 15:43 ` Ilias Apalodimas
2021-04-19 16:21 ` Shakeel Butt
2021-04-19 18:41 ` Ilias Apalodimas
2021-04-19 11:22 ` Jesper Dangaard Brouer
2021-04-19 13:01 ` Matthew Wilcox
2021-04-20 8:10 ` Ilias Apalodimas
2021-04-09 22:37 ` [PATCH net-next v3 3/5] page_pool: Allow drivers to hint on SKB recycling Matteo Croce
2021-04-10 0:11 ` Ilias Apalodimas
2021-04-10 0:39 ` Matteo Croce
2021-04-09 22:38 ` [PATCH net-next v3 4/5] mvpp2: recycle buffers Matteo Croce
2021-04-09 22:38 ` [PATCH net-next v3 5/5] mvneta: " Matteo Croce
2021-04-29 8:27 ` [PATCH net-next v3 0/5] page_pool: " Yunsheng Lin
2021-04-29 18:51 ` Ilias Apalodimas
2021-04-30 3:01 ` Yunsheng Lin
2021-04-30 16:24 ` Ilias Apalodimas
2021-04-30 17:32 ` Ilias Apalodimas
2021-05-03 7:29 ` Jesper Dangaard Brouer
2021-05-06 12:34 ` Yunsheng Lin
2021-05-06 12:58 ` Ilias Apalodimas
2021-05-07 3:23 ` Yunsheng Lin
2021-05-07 7:06 ` Ilias Apalodimas
2021-05-07 8:28 ` Yunsheng Lin
2021-05-07 10:19 ` Jesper Dangaard Brouer
2021-05-07 11:31 ` Christoph Hellwig
2021-05-09 5:11 ` Shay Agroskin
2021-05-11 8:41 ` Ilias Apalodimas
2021-05-10 2:20 ` Yunsheng Lin
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